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Blood pressure and body size preference in traditional communities of Ilorin metropolis, Nigeria

Okoro, Emmanuel O.a; Etebu, Ebitimitula N.c; Oyejola, Benjamin A.b

Cardiovascular Endocrinology & Metabolism: June 2015 - Volume 4 - Issue 2 - p 53–59
doi: 10.1097/XCE.0000000000000048
Original articles
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Background Our previous work showed that many individuals with type 2 diabetes and in the background population may prefer larger body sizes. This prompted us to study the interaction between body size, body size perception and blood pressure.

Methods Anthropometric variables, body size perception and blood pressure were measured in adults of three Nigerian communities. The results were subjected to tests of correlation and regression to determine any association/functional relationship between predictor variables and blood pressure.

Results Participants with elevated blood pressure were older (52.75 vs. 39.58 years) and had a higher BMI (24.50 vs. 22.84), waist circumference (86.69 vs. 81.57) and hip circumference (95.23 vs. 92.49) compared with normotensives. There were significant (P<0.05) correlations between systolic blood pressure and age (0.401), weight (0.13), BMI (0.182), waist circumference (0.231), hip circumference (0.132), height (0.15), current body size perception (0.181), preferred body size (0.119) and preferred body size of the opposite gender (0.14). For normotensives, a 1 cm increment in waist circumference was associated with an increase in systolic blood pressure by 0.35 mmHg in those younger than 50 years of age. In older participants, an increase in BMI by 1 kg/m2 led to an increase in systolic blood pressure by 1.1 mmHg. Thirty-two per cent of the participants had hypertension. Less than 10% of the interindividual differences in blood pressure resulted from variations in body dimensions/or body size perception. Significantly, 66.5 versus 51.9% of hypertensive and normotensive individuals, respectively, desired a larger body size for self/spouse.

Conclusion The results indicated a dominant preference for larger body sizes, whereas body dimension predicted blood pressure only to a very limited degree.

aDepartment of Medicine, Division of Hypertension, Diabetes and Therapeutics, University of Ilorin Teaching Hospital

bDepartment of Statistics, University of Ilorin, Ilorin

cDepartment of Histopathology, Niger Delta University, Wilberforce Island, Bayelsa State, Nigeria

Correspondence to Emmanuel O. Okoro, MBBS, Department of Medicine, Division of Hypertension, Diabetes and Therapeutics, University of Ilorin Teaching Hospital, University of Ilorin, P.M.B 1515, Ilorin, Nigeria Tel: +234 803 730 1311; e-mail: eookoro2003@gmail.com

Received July 1, 2014

Accepted January 15, 2015

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Introduction

Weight reduction is a widely adopted intervention for minimizing the risk of developing and controlling hypertension in many jurisdictions including Nigeria 1–3. However, weight loss is not always easy for everyone, with some studies 4–6 indicating that fewer than 20% of individuals attempting to do so actually maintained lost weight over time. Moreover, many individuals with elevated blood pressure (BP) are neither overweight nor obese. In some groups, the dominant body type associated with hypertension is lean 7–9. These observations could raise the intriguing possibility that mechanism(s) beyond excess weight may be more important in driving an increase in BP, at least in some groups.

Furthermore, body size is often tied to the notion of beauty, and body figure preference can vary with community to the extent that what is considered desirable in one group may be viewed differently in another 10–17. Specifically, how individuals perceive their body size in relation to the preferred body figure in their group can affect self-esteem and influence weight-control behaviour 10,14. Not long ago, we observed 18 a preference for larger body figures in a cohort of middle-age/elderly Nigerians with type 2 diabetes. More recent data 19 suggest that this body size preference may be more widespread in the background population than considered previously, particularly in some Yoruba-speaking communities in the wider Ilorin city with a thriving metropolis of over one million individuals.

As these observations could have implications for interventions, aimed at minimizing the risk of hypertension on the basis of weight control, we examined the role of BMI, waist circumference (WC) and body size perception (perceived and desired) in the determination of BP. The study aimed to ascertain, if any, the relationship between indicators of body size and BP and to determine which indicators (if any) can be used to predict BP. In this work, BMI and WC were used as anthropometric measures of actual body size and shape, respectively 19–22. This work, therefore, describes our observations and is presented under the following headings: method (including the participants involved, experimental tools used and procedures adopted for data acquisition), results and comment on the findings.

An oral presentation of part of these data was made to the Nigerian Society of Endocrinology and Metabolism at its 33rd Annual Scientific Meeting in Kaduna, Nigeria, 21–23 September 2011 23, and to the World Health Organization Collaborating Centre for International Drug Monitoring Research Conference entitled ‘RISK: What risk? Whose risk?’ at Uppsala, Sweden, 22–23 May 2014 24.

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Methods

Study population, ethics and community mobilization

These have been detailed elsewhere 18,19. The study was carried out in the traditional communities of Okelele, Idi-Ape and Pakata communities in Ilorin, a thriving state capital of over one million individuals in Nigeria. Participants were indigenous individuals aged 18 years or older living in their ancestral homes within the greater Ilorin metropolis. Identified community leaders assisted in mobilizing potential participants. Participation was voluntary, and enrollees could exit the study at any stage without the need for explanations. Neither cash nor free medicines were offered as inducement. Data collection was carried out in 2008.

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Experimental tools and procedures

All measurements were carried out by trained research assistants in a tent located in a secluded corner within the compound of the community head.

Demographic/anthropometric parameters of interest including age (in years), body weight in kg, height in cm, WC and hip circumference (HPC) in cm were measured, whereas BMI in kg/m2 was calculated for each volunteer as detailed previously 1,2,20.

Body size perception/preference was measured using the Stunkard Body Figure Test as modified for black individuals 12,13,17. Specifically, volunteers indicated which figure (1–9 in increasing size) most represented their current body size (CBS) and the one they would ideally want to be, that is, preferred body size (PBS). In addition, participants were requested to choose a preferred body size for their spouse or the opposite gender (PBSOG). Reports 17,25 had indicated that how one gender views it body size can be influenced by the preference of the other.

BP was measured with a standard Accosson mercury sphygmomanometer [A.C. Cossor & Son (Surgical) Ltd, Harlow, Essex, UK] using an appropriate-sized cuff that covered at least two-thirds of the upper arm. BP was recorded with the participant sitting comfortably on a chair with the arm rested at the heart level on a table. All measurements were obtained after a 3-min rest by the same observers throughout the study. Systolic blood pressure (SBP) was determined by the first appearance of Kortkoff sound (phase 1) and diastolic blood pressure (DBP) was recorded at the point of disappearance (phase 5). BP readings were to the nearest 2 mmHg and recorded thrice for each participant. The average of the last two readings was considered as the BP for each participant. In volunteers with readings of SBP 140 mmHg or more and/or DBP 90 mmHg or more, BP measurement was repeated on two different dates within 1 week of the first. The average of the three values was used to classify the final BP status of the individual. Participants with persistent values of 140/90 mmHg or above were followed up in the Medical Outpatient Clinics of our hospital. For the purpose of this study, elevated BP was defined as SBP 140 mmHg or more and/or DBP 90 mmHg or more or both.

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Statistical analyses

Statistical analyses were carried out using the SPSS 15.0 and S-plus 2000 computer packages (SPSS Inc., Chicago, Illinois, USA). Descriptive statistics were calculated to characterize the sample. In addition, the t-test was used to determine differences in means, whereas the χ2-test was used to compare frequencies. The Pearson correlation coefficient was used to test for a linear relationship between two quantitative variables. In addition, linear regression was used to determine the functional relationship between BP and measures of body size and perception. Stepwise regression analysis was used to select those variables of body size and perception that best relate to BP values. Logistic regression was used to assess the odd ratios of being hypertensive (SBP≥140/90 mmHg and/or DBP≥90 mmHg). A P value of less than 0.05 was considered significant, except when otherwise stated. Cohen’s d, which is an effect size used to indicate the standardized difference between two means, was also calculated. The d values were interpreted as follows: d∼0 implies no or a near-zero effect, d less than 0.2 implies small-size effects, d=0.2–0.5 implies moderate-size effects and d more than 0.5 indicates a large effect.

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Results

The study sample included 523 participants, divided into those with elevated BP and a group with normal BP (Table 1). Those with elevated BP tended to have larger body dimensions. The differences in the means of the two groups in all variables were moderately large, except for WC/HPC, for which the means were similar (see P and d values in Table 1). However, the mean BMI values of both groups were lower than 25 kg/m2. A significantly higher proportion (38.1%; i.e. 64 out of 168) of participants with elevated BP had high BMI (≥25 kg/m2) against 26.4% (92 out of 348) of participants with normal BP (χ2=7.30, d.f.=1, P=0.007). The CBS, PBS and PBSOG scores were higher in participants with elevated BP compared with those with normal BP, but the general direction of preferred body figure relative to CBS was upward in both groups (Table 1). In addition, 66.5 and 51.9% of the participants with elevated BP and those with normal BP, respectively, chose a larger body figure of 5 and above (i.e. those with visible fat) as desirable.

Table 1

Table 1

SBP increased with age, but less so with indicators of body size (Table 2). A similar trend was evident with respect to DBP, but with lower correlations (data not shown for clarity).

Table 2

Table 2

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Relationship between blood pressure and variables of interest

The results of the stepwise linear regression analysis that was used to select indicators of body size that best relate to BP and the functional relationships are as follows:

For the entire group:

Standard errors are in brackets below the coefficients in the equations.

This preliminary analysis did not show any major role for actual body size (BMI) in the relationship with BP. The data were then divided by age into those younger than 50 years of age and those older than 50 years of age in accordance with a previous publication and also because hypertension in Nigerians usually manifests before this age 26–28. The relationship was then examined for each group and yielded the following results:

Those younger than 50 years:

For older participants:

None of the variables showed any significant relationship with DBP.

Similarly, the data were divided by BP into those with elevated BP and those with normal BP, and re-run. This yielded the following equations:

Those with normal BP:

Those with elevated BP:

No systematic relationship was observed between DBP and indicators of body size. Figure 1 summarizes the contribution of body dimensions towards variations in BP on the basis of the R2 value, failing to reach statistical significance (P=0.101) in the group with elevated BP. The results of stepwise logistic regression analyses are summarized in Table 3. CBS emerged as the best indicator of body size to determine whether a participant is likely to have elevated BP or not with a correct classification of BP status of 68.8% (Table 3). The contribution of CBI and any of the other body size indicators yielded a lower per cent of the correct classification. When the combination of age and CBI was used, the correct classification of BP increased marginally to 71%.

Fig. 1

Fig. 1

Table 3

Table 3

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Discussion

The results show that participants with larger body dimensions also had higher BP as indicated by the correlation values. In particular, as WC increased, so did BP (see r values in Table 2). Also, the differences in measurements of body size between the group with elevated BP and those with normal BP were moderately large, except for WC/HPC (Table 1). This is consistent with many previous reports 29–31. However, compared with findings 21,22,32–35 in non-Nigerian groups, particularly African–Americans and whites, the present association between BP and body size indicators appears weak. Even so, the present correlation values were higher than those for age (0.05), BMI (0.088) and WC (0.061) reported by Onwubere et al. 31 in another Nigerian traditional community of a different ethnicity with a prevalence of hypertension of 46.4% compared with 33.1% found in this study. This weak or lack of a relationship between body dimensions and BP has also been observed in other groups particularly within Africa 7,9,29–31,36–38. It should be noted that nearly two-thirds of individuals with elevated BP had a BMI of less than 25 kg/m2, thereby indicating that the dominant body type associated with hypertension in this group was lean. This is consistent with the findings of independent investigators 7,9,36–38. The corollary to this is that about a quarter (26.1%) of those with normal BP were overweight, thus showing that larger body sizes were not always associated with elevated BP in every group 36,39–41.

Importantly, the regression analyses showed that BMI or WC did not have the same effects on BP in all participants. In particular, the functional relationship between SBP and BMI, with a constant of 1.103 and an R2 value of 0.046 in older participants (≥50 years), was comparable with 1.17 and R2 of 0.050 reported by Cappuccio et al.30 from the same ethnic group and region, albeit in men. Interestingly, these quantitative effects of BMI and WC on SBP disappeared once BP was elevated as indicated by a P value of 0.101 of the functional relationship between BP and indicators of body dimensions in the group with elevated BP (see the Results section and Fig. 1). This could mean that the effects of body size on BP may depend on age and whether or not hypertension was present.

Furthermore, the results from the different methods used in the analysis of the present data consistently showed that BMI and WC were rather poor predictors of BP. This consistency reinforces our interpretation that body size was unlikely to be a major determinant of BP in this group, suggesting that differences in body dimensions may not be of major relevance in the determination of BP level in everyperson or group, especially when hypertension is present as others have also argued 7,9,39–43.

This work therefore extends our recent observations 19, whereby BMI and WC accounted for only about 1% of the interindividual differences in blood glucose in this same group that also showed a rather low prevalence of abnormal glucose metabolism, including overt type 2 diabetes, of 0.3% compared with 2.3% and above in other Nigerian cities at the time 44,45. It should be noted that compelling evidence 46–48 has emerged that suggests that hypertension and type 2 diabetes are linked and may share a common disease mechanism. To this extent, our data add to the growing body of evidence 6–8,28,30,32–41,43,44,49–53 showing that body size and/or changing body dimensions may not always affect BP and glucose metabolism in the same way in every individual/group, consistent with the possibility of heterogeneity in the interaction of body size and BP.

Surprisingly, the present results (Table 3) also suggest that how individuals perceive (particularly CBS) their actual body size could in some ways be related to BP (see also regression equations, Tables 2 and 3). This finding could be of concern, given that the majority of respondents (66.5 and 51.9% of the participants with elevated BP and normal BP, respectively), although predominantly of normal size, still desired a larger body figure. The level of correct classification of BP (Table 3) on the basis of CBS as an independent variable was, however, rather low at 68.8% and marginally increased to 71% when combined with age, which is the variable most associated with increasing BP (see the r values in Table 2).

More importantly, the results repeatedly failed to show that differences in body size (BMI), shape (WC) or and whether or not a different body type is desired contributed in any meaningful way towards interindividual differences in BP. This conclusion is reinforced by the R2 values of the various equations defining the functional relationship between BP and the various measures of body size that tend to suggest that over 91% of the participant-to-participant differences in BP are related more to differences other than those because of BMI, WC or body size perception.

Nevertheless, the data also show that large body sizes may be a valuable social asset in these communities as reported widely 10–16 in many black groups of diverse geographic locations and ethnicity. More recent studies 25,54 overseas, however, suggest that in some black groups, up to 80% of participants may prefer thinner body figures. One study 55 reported that the majority of young women in one university campus in Nigeria prefer slimmer figures, even when of normal size. These studies cited above mainly involved elites attempting to lose weight for health/beauty reasons and were in settings where intense media exposure was likely, unlike in the present study group 19, who were less educated and living traditionally. Together, these reports could indicate a possible cultural shift towards a more pervasive notion of beauty/health as thinner is better. Even so, it is to be noted that younger and, sometimes, older women are known to undergo a fattening process to improve appearance (as part of marriage/coming-of-age-rites, etc.) in several ethnic groups, for example, Efik, Ibani-Ijaw, Kalabari, Ogori, Boki, etc. in contemporary Nigeria 56–58.

These findings have implications for future research in raising a number of important issues of relevance to the prevention/control of hypertension. First, if the indicators of body size (BMI) and shape (WC) play such a minimal role in the variation in BP of adults in these communities, as this study strongly suggests, then it means that we do not know why the majority of those with elevated BP are those who are lean and why others, overweight, have normal BP. Second, preference for a particular body size can be a powerful motivation for weight-control behaviour in that an individual who desires a larger body size may be less inclined to lose weight. Weight-based interventions have been recommended to control/prevent hypertension. The relevance of a desire for larger body sizes as it relates to possible effects of weight reduction on individuals’ perception of body size is not clear as this is rarely monitored. Unfortunately, the cross-sectional nature of our study is a major limitation in answering these important questions including making any possible inference on causality from the present data set. To this extent, longitudinal studies are needed to investigate the interaction between indicators of body size/shape, perception of body size and BP in the absence/presence of a family history of hypertension, preferably beginning in early childhood.

In addition, our findings of the interaction between body size and BP in adult population were from only three traditional communities of the Yoruba, one of three major ethnic and linguistic groups in Nigeria, predominantly found in south-western and north–central geographic regions of the country. Nigeria is widely believed to have over 250 ethnic groups and 500 linguistic groups. For these reasons, it is not entirely clear the extent to which these findings can apply to other Yoruba groups in the same/or different regions or to other ethnic groups with distinct languages, cultures and traditions.

However, it is important to note that other independent investigators 7,8,29,30 have reported similar findings, whereby body size appears to play only a limited role in the variance of BP in rural/traditional Yoruba groups in another region. Indeed, some of these reports 38,59 indicate that in rural Yoruba communities similar to the ones we studied, where habitual exercise linked to daily living involves high energy expenditure, the role of body size in the determination of BP in adults is considerably reduced or even ceases to exist, similar to our findings in children and adolescents in the north-western region, where the increase in BP with age was less so in areas where the lifestyle was predominantly traditional/rural 60.

Finally, irrespective of these limitations, the present study strengthens our earlier conclusion 18,19 that a dominant notion of physical beauty that favourably views excess weight, as defined by the European standard, exists in this group. The data also showed that body size and/or its perception contributed towards the variance in BP between individuals, but only nominally so. Consequently, if these observations are confirmed in longitudinal studies, they could alter the standard view that a large body size or an increasing body size is fundamental to the increasing incidence of hypertension in Nigeria, at least in some traditional groups.

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Acknowledgements

A substantial part of the work was carried out during a sabbatical leave in Niger Delta University in Wilberforce Island, Bayelsa State, Nigeria. We thank Drs P.M. Kolo, A.D. Chijioke, H.O. Sholagberu and S.A. Adebisi for their help in organizing the logistics that facilitated field work and data acquisition. The study was partly funded by a small grant from the University of Ilorin Teaching Hospital.

This work is dedicated with gratitude to Marie Lindquist, PhD, for her untiring efforts in advancing pharmacovigilance for better treatment outcome in several developing countries including Nigeria.

E.O. Okoro conceptualized and designed the study with B.A. Oyejola, who also analysed the results. Data interpretation was carried out by E.O. Okoro, E.N. Etebu and B.A. Oyejola. Dr E.N. Etebu wrote the initial draft, which was reviewed by E.O. Okoro. Thereafter, all authors read the material and made critical inputs to the final manuscript.

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Conflicts of interest

There are no conflicts of interest.

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References

1. Kadiri S. Management of hypertension with special emphasis on Nigeria. Niger Clin Rev 2001; 5:5–8.
2. Odili VU, Oghagbon EK, Ugwu NA, Ochei UM, Aghomo OE. Adherence to international guidelines in the management of hypertension in a tertiary hospital in Nigeria. Trop J Pharm Res 2008; 7:945–952.
3. Jennings GL, Touyz RM. Hypertension guidelines: more challenges highlighted by Europe. Hypertension 2013; 62:660–665.
4. Wing RR, Phelan S. Long-term weight loss maintenance. Am J Clin Nutr 2005; 82 (Suppl):222S–225S.
5. Baradel LA, Gillespie C, Kicklighter JR, Doucette MM, Penumetcha M, Blanck HM. Temporal changes in trying to lose weight and recommended weight-loss strategies among overweight and obese Americans, 1996–2003. Prev Med 2009; 49:158–164.
6. Matheson EM, King DE, Everett CJ. Healthy lifestyle habits and mortality in overweight and obese individuals. J Am Board Fam Med 2012; 25:9–15.
7. Kerry SM, Micah FB, Plange-Rhule J, Eastwood JB, Cappuccio FP. blood pressure and body mass index in lean rural and semi-urban subjects in West Africa. J Hypertens 2005; 23:1645–1651.
8. Ekore RI, Ajayi IO, Arije A. Case finding for hypertension in young adult patients attending a missionary hospital in Nigeria. Afr Health Sci 2009; 9:193–199.
9. Tesfaye F, Nawi NG, Van Minh H, Byass P, Berhane Y, Bonita R, Wall S. Association between body mass index and blood pressure across three populations in Africa and Asia. J Hum Hypertens 2007; 21:28–37.
10. Mama SK, Quill BE, Fernandez-Esquer ME, Reese-Smith JY, Banda JA, Lee RE. Body image and physical activity among Latina and African American women. Ethn Dis 2011; 21:281–287.
11. Puoane T, Tsolekile L, Steyn N. Perceptions about body image and sizes among Black African girls living in Cape Town. Ethn Dis 2010; 20:29–34.
12. Becker DM, Yanek LR, Koffman DM, Bronner YC. Body image preferences among urban African Americans and whites from low income communities., Ethn Dis 1999; 9:377–386.
13. Szabo CP, Allwood CW. Body figure preference in South African adolescent females: a cross cultural study. Afr Health Sci 2006; 6:201–206.
14. Anderson LA, Eyler AA, Galuska DA, Brown DR, Brownson RC. Relationship of satisfaction with body size and trying to lose weight in a national survey of overweight and obese women aged 40 and older, United States. Prev Med 2002; 35:390–396.
15. Kronenfeld LW, Reba-Harrelson L, Von Holle A, Reyes ML, Bulik CM. Ethnic and racial differences in body size perception and satisfaction. Body Image 2010; 7:131–136.
16. Mintem GC, Horta BL, Domingues MR, Gigante DP. Body size dissatisfaction among young adults from the 1982 Pelotas’ birth cohort. Eur J Clin Nutr 2015; 69:55–61.
17. Bhuiyan AR, Gustat J, Srinivasan SR, Berenson GS. Differences in body shape representations among young adults from a biracial (black–white), semirural community: the Bogalusa Heart Study. Am J Epidemiol 2003; 158:792–797.
18. Okoro EO, Oyejola BA. Body image preference among Nigerians with type 2 diabetes. Pract Diab Int 2008; 25:228–231.
19. Okoro EO, Oyejola BA, Etebu EN, Sholagberu H, Kolo PM, Chijioke A, Adebisi SA. Body size preference among Yoruba in three Nigerian communities. Eat Weight Disord 2014; 19:77–88.
20. Okoro EO, Adeyemi MI. Physical stature of three groups of adolescent children in Ilorin metropolis: a comparative study. Niger Med Pract 1999; 37 (5/6):62–66.
21. Adams-Campbell LL, Wing R, Ukoli FA, Janney CA, Nwankwo MU. Obesity, body fat distribution, and blood pressure in Nigerian and African-American men and women. J Natl Med Assoc 1994; 86:60–64.
22. Jimoh KA, Adediran OS, Agboola SM, Tomi-Olugbodi D, Idowu AA, Adebisi SA, Adedeji AT. A study of correlation between derived and basic anthropometric indices in type 2 diabetes mellitus. Eur J Sci Res 2009; 36:437–444.
23. Okoro EO, Oyejola BA. Body size preference among Yoruba in three communities in Nigeria. 33rd Annual Scientific meeting of the Nigerian Society of Endocrinology and Metabolism. Kaduna, Nigeria; 21–23 September 2011.
24. Okoro EO. Risk and race/ethnicity: effects of body dimensions on blood pressure and glucose metabolism in some Nigerian groups. Risk: what risk? whose risk? Uppsala Monitoring Centre Research Conference 2014 on Patient Safety. Uppsala, Sweden; 22–23 May. Available at: http://www.who-umc.org/graphics/28154.pdf. [Accessed 15 June 2014].
25. Jumah NA, Duda RB. Comparison of the perception of ideal body images of Ghanaian men and women. Afr J Health Sci 2007; 14 (1–2):54–60.
26. Williams PT. Increases in weight and body size increase the odds for hypertension during 7 years of follow-up. Obesity (Silver Spring) 2008; 16:2541–2548.
27. Mbakwem AC, Oke DA, Ajuluchukwu JN, Abdulkareem FB, Ale O, Odunlami K. Trends in acute emergency room hypertension related deaths: an autopsy study. Niger J Clin Pract 2009; 12:15–19.
28. Obiorah CC, Amakiri CNT. Systemic analysis of sudden natural deaths at Braithwaite memorial specialist hospital, Port-Harcourt, Nigeria. Niger Health J 2012; 12:47–51.
29. Adedoyin RA, Mbada CE, Bisiriyu LA, Adebayo RA, Balogun MO, Akintomide AO. Relationship of anthropometric indicators with blood pressure levels and the risk of hypertension in Nigerian adults., Int J Gen Med 2008; 1: , 33–40.
30. Cappuccio FP, Kerry SM, Adeyemo A, Luke A, Amoah AG, Bovet P, et al.. Body size and blood pressure: an analysis of Africans and the African Diaspora. Epidemiology 2008; 19:38–46.
31. Onwubere BJC, Ejim EC, Okafor CI, Emehel A, Mbah AU, Onyia U, Mendis S. Pattern of blood pressure indices among the residents of a rural community in south eastern Nigeria. Int J Hypertens 2011; 2011:1–6.
32. Colin Bell A, Adair LS, Popkin BM. Ethnic differences in the association between body mass index and hypertension. Am J Epidemiol 2002; 155:346–353.
33. Adams-Campbell LL, Nwankwo M, Ukoli F, Omene J, Haile GT, Kuller LH. Body fat distribution patterns and blood pressure in black and white women. J Natl Med Assoc 1990; 82:573–576.
34. Okosun IS, Cooper RS, Rotimi CN, Osotimehin B, Forrester T. Association of waist circumference with risk of hypertension and type2 diabetes in Nigerians, Jamaicans, and African-Americans. Diabetes Care 1998; 21:1836–1842.
35. LA de Hoog M, van Eijsden M, Stronks K, Gemke RJ, Vrijkotte TG. Association between body size and blood pressure in children from different ethnic origins. Cardiovasc Diabetol 2012; 11:136.
36. Danon-Hersch N, Chiolero A, Shamlaye C, Paccaud F, Bovet P. Decreasing association between body mass index and blood pressure over time. Epidemiology 2007; 18:493–500.
37. Achie LN, Olorunshola KV, Toryila JE, Tende JA. The body mass index, waist circumference and blood pressure of post-menopausal women in Zaria, Northern, Nigeria. Curr Res J Biol Sci 2012; 4:329–332.
38. Luke A, Kramer H, Adeyemo A, Forrester T, Wilks R, Schoeller D, et al.. Relationship between blood pressure and physical activity assessed with stable isotopes. J Hum Hypertens 2005; 19:127–132.
39. Jennings CL, Lambert EV, Collins M, Joffe Y, Levitt NS, Goedecke JH. Determinants of insulin-resistant phenotypes in normal-weight and obese Black African women. Obesity (Silver Spring) 2008; 16:1602–1609.
40. Walker AR, Walker BF, Manetsi B, Tsotetsi NG, Walker AJ. Obesity in black women in Soweto, South Africa: minimal effects on hypertension, hyperlipidaemia and hyperglycaemia. J R Soc Health 1990; 110:101–103.
41. Walker AR, Walker BF, Walker AJ, Vorster HH. Obesity in indigent elderly rural African women: low frequency of adverse sequalae of obesity in South African rural black women. Int J Vitam Nutr Res 1989; 59:224–228.
42. Kuller HL. Weight loss and reduction of blood pressure and hypertension. Hypertension 2009; 54:700–701.
43. Jerant R, Franks P. Body mass index, diabetes, hypertension and short-term mortality: a population based observation study: 2000–2006. J Am Board Fam Med 2012; 25:422–431.
44. Nyenwe EA, Odia OJ, Ihekwaba AE, Ojule A, Babatunde S. Type 2 diabetes in adult Nigerians: a study of its prevalence and risk factors in Port Harcourt, Nigeria. Diabetes Res Clin Pract 2003; 62:177–185.
45. Puepet FH, Ohwovoriole AE. Prevalence of risk factors for diabetes mellitus in a non-diabetic population in Jos, Nigeria. Niger J Med 2008; 17:71–74.
46. Ologe FE, Okoro EO, Oyejola BA. Hearing function in Nigerian children with family history of type 2 diabetics. Int J Pediatr Otorhinolaryngol 2005; 69:387–391.
47. Okoro EO, Oyejola BA, Jolayemi ET. Pattern of salt taste perception and blood pressure in normotensive offspring of hypertensive and diabetic patients. Ann Saudi Med 2002; 22:249–251.
48. Talmud PJ, Cooper JA, Gaunt T, Holmes MV, Shah S, Palmen J, et al.. Variants o ADRA2A are associated with fasting glucose, blood pressure, body mass index and type 2 diabetes risk: meta-analysis of four prospective studies. Diabetologia 2011; 54:1701–1719.
49. Troiano RP, Frong EA Jr, Sobal J, Levitsky DA. The relationship between bodyweight & mortality: a quantitative analysis of combined information from existing studies. Int J Obes Relat Metab Disord 1996; 20:63–75.
50. Rheeder P, Stolk RP, Veenhouwer JF. The metabolic syndrome in black hypertensive women – waist circumference more strongly related than body mass index. S Afr Med J 2002; 92:637–641.
51. Danaei G, Finucane MM, Lu Y, Singh GM, Cowan MJ, Paciorek CJ, et al.. On behalf of the Global Burden of Metabolic Risk Factors of Chronic Diseases Collaborating Group (Blood Glucose). National, regional, and global trends in fasting plasma glucose and diabetes prevalence since 1980: systematic analysis of health examination surveys and epidemiological studies with 370 country-years and 2.7 million participants. Lancet 2011; 378: 31–40.
52. Finucane MM, Stevens GA, Cowan MJ, Danaei G, Lin JK, Paciorek CJ, et al.. On behalf of the Global Burden of Metabolic Risk Factors of Chronic Diseases Collaborating Group (Body Mass Index). National, regional, and global trends in body-mass index since 1980: systematic analysis of health examination surveys and epidemiological studies with 960 country-years and 9.1 million participants. Lancet 2011; 377:557–567.
53. Reis JP, Loria CM, Sorlie PD, Park Y, Hollenbeck A, Schatzkin A. Lifestyle factors and risk for new-onset diabetes: a population-based cohort study., Ann Intern Med 2011; 155:292–299.
54. Lieberman LS, Probart CK, Schoenberg NE. Body image among older, rural, African–American women with type 2 diabetes. Coll Antropol 2003; 27:79–86.
55. Dike IP. Anorexia and bulimia nervosa: the scenario among Nigerian female students. J Psychol Counsel 2009; 1:26–29.
56. Igbokwe C. Big bottom, Queen Elizabeth and our dying culture. Sunday Punch Newspaper; 2008; p. 53. Available at: http://www.punchng.com [Accessed 15 June 2008].
57. Oloruntoba-Oju T. Body image, beauty, culture and language in the Nigerian African context. Sex Afr Mag 2008; 5:4–6.
58. Anam N. Nigeria: Ebre cultural society in Ibibio land. The Guardian 28 November 2014; 31 (13118), p. 51. Available at: http://www.ngrguardiannews.com [Accessed 24 November 2014].
59. Luke A, Adeyemo A, Kramer H, Forrester T, Cooper RS. Association between blood pressure and resting energy expenditure independent of body size. Hypertension 2004; 43:555–560.
60. Hamidu LJ, Okoro EO, Ali MA. Blood pressure profile in Nigerian children. East Afr Med J 2000; 77:180–184.
Keywords:

blood pressure; body size; body size perception; Nigerians

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