Epidemiology and Social
Home visits during pregnancy enhance male partner HIV counselling and testing in Kenya: a randomized clinical trial
Osoti, Alfred Onyangoa,b; John-Stewart, Graceb,c,d; Kiarie, Jamese; Richardson, Barbrac,f,h; Kinuthia, Johng; Krakowiak, Daisyb; Farquhar, Careyb,c,d
aDepartment of Obstetrics & Gynecology, AIC Kijabe Hospital, Kijabe, Kenya
bDepartment of Epidemiology
cDepartment of Global Health
dDepartment of Medicine, University of Washington, Seattle, Washington, USA
eDepartment of Obstetrics & Gynecology, University of Nairobi, Nairobi, Kenya
fDepartment of Biostatistics, University of Washington, Seattle, Washington, USA
gDepartment of Obstetrics & Gynecology, Kenyatta National Hospital, Nairobi, Kenya
hVaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, USA.
Correspondence to Alfred Osoti, MBChB, MMed, MPH, AIC Kijabe Hospital, Kenya, International AIDS Research and Training Program, University of Washington, 325 9th Avenue, Box 359909, Seattle, WA 98104, USA. Tel: +1 206 543 4278; fax: +1 206 543 4818; e-mail: firstname.lastname@example.org
Received 7 June, 2013
Revised 17 July, 2013
Accepted 24 July, 2013
Background: HIV testing male partners of pregnant women may decrease HIV transmission to women and promote uptake of prevention of mother-to-child HIV transmission (PMTCT) interventions. However, it has been difficult to access male partners in antenatal care (ANC) clinics. We hypothesized that home visits to offer HIV testing to partners of women attending ANC would increase partner HIV testing.
Methods: Women attending their first ANC were enrolled, interviewed using smartphone audio-computer-assisted self-interviews and randomized to home visits or written invitations for male partners to come to clinic, if they were married or cohabiting, unaccompanied by partners and had no prior couple HIV counselling and testing (CHCT). Enrolled men were offered CHCT (HIV testing and mutual disclosure). Prevalence of CHCT, male HIV seropositivity, couple serodiscordance and intimate partner violence, reported as physical threat from partner, were compared at 6 weeks.
Results: Among 495 women screened, 312 were eligible, and 300 randomized to clinic-based or home-based CHCT. Median age was 22 years (interquartile range 20–26 years), and 87% were monogamous. CHCT was significantly higher in home-visit than in clinic-invitation arm (n = 128, 85% vs. n = 54, 36%; P < 0.001). Home-arm identified more HIV-seropositive men (12.0 vs. 8.0%; P = 0.248) and more HIV-discordant couples (14.7 vs. 4.7%; P = 0.003). There was no difference in intimate partner violence.
Conclusion: Home visits of pregnant women were safe and resulted in more male partner testing and mutual disclosure of HIV status. This strategy could facilitate prevention of maternal HIV acquisition, improve PMTCT uptake and increase male HIV diagnosis.
In developing countries, especially in sub-Saharan Africa, the male partner may strongly influence decisions affecting women's reproductive health and uptake of prevention of mother-to-child HIV transmission (PMTCT) interventions [1–4]. Women who undergo individual HIV counselling and testing (HCT) without male partner support may not disclose their HIV status to their partner due to fear of accusations of infidelity, violence, abandonment and loss of economic support [5,6]. Women who do not secure their male partners’ support are less likely to adhere to comprehensive PMTCT interventions [7,8]. Lack of male partner HIV testing among serodiscordant couples if the man is HIV infected may also result in maternal HIV seroconversion during pregnancy and breastfeeding, and these acutely infected women are at an exceptionally high risk of MTCT [9,10]. Despite the increasing evidence that couple HCT may increase uptake of PMTCT and benefit maternal and child health, male partner HCT remains low [11–13].
Increasing male partner involvement has been stymied by an inability to access male partners of pregnant women in antenatal care (ANC) clinics. Less than 20% of male partners undergo clinic-based HCT in most low-resource settings, even following adaptations to the ANC clinics to encourage male attendance [8,13,14]. One study noted increased uptake of male partner testing following community mobilization, sensitization and written invitation, but this only modestly increased testing to 32% . Barriers to male testing in ANC include inadequate infrastructure within the ANC clinics and cultural norms that view ANC clinics as limited to women [16,17].
In regions with high HIV prevalence, community-wide door-to-door home-based HIV counselling and testing (HBCT) has been feasible and leads to increased uptake of HIV testing [18,19]. However, in at least three studies, less than 30% of testers reached through door-to-door HBCT were men and few (∼4%) of the tested men were partners of women who were pregnant at the time [20–22].
Although some studies suggest an association between HIV infection and experiencing intimate partner violence or relationship instability by women [23,24], this association was not found in a recent review of data from 10 developing countries . On the contrary, couple counselling and testing may improve communication between couples and their coping with HIV infection [26,27].
It is unknown whether provider-initiated home-based couple HCT offered to women attending ANC clinics as male partner testing and mutual disclosure would be acceptable and effective in increasing male partner HCT. To evaluate whether home visits would increase male partner HIV testing among pregnant women attending ANC, we conducted a randomized clinical trial to compare male partner access, uptake and safety of couple HCT between pregnant women visited at home and those whose partners were invited to the clinic.
Materials and methods
Study design and setting
This was a randomized, single-blind clinical trial in which pregnant women seeking ANC underwent block randomization to either a home visit or an invitation to bring their male partner to the clinic for couple HCT. The study was conducted in a rural resource-constrained high HIV prevalence setting in Nyanza province, Kenya, at the Ahero Sub-district Hospital. The hospital provides PMTCT as well as comprehensive HIV care services, including antiretroviral therapy.
All pregnant women presenting to the clinic for their first ANC visit were screened for study eligibility. Women were eligible if they were at least 18 years old, in stable relationships and unaccompanied by their male partners during their first ANC visit. Eligible women could not have received couple HCT in the current pregnancy, prior to their first ANC visit. HIV-positive women were ineligible if they had previously disclosed their HIV status to their male partners. Women were enrolled if they understood and consented for randomization to a home visit or clinic invitation for proposed couples HCT, and planned to stay with their male partners in the study area for at least 6 weeks after enrolment.
Eligible women were interviewed through audio-computer-assisted self interview (ACASI), randomized to either home visit or to clinic invitation to bring their male partner to clinic for couples HCT and subsequently received routine HCT and ANC. A trained community health worker, who was also an experienced HIV counsellor, immediately accompanied women who were randomized to the home HCT arm to their homes to access the male partner and invite his participation in the study. If the male partner was not available, an appointment was scheduled. The counsellors obtained a physical address and global positioning system (GPS) coordinates for return visits. Pregnant women allocated to the clinic-based arm were given a written note inviting their male partners for reproductive health education and couple HCT at the ANC clinic and they also provided details of their physical home address. Women in the clinic HCT arm were encouraged to schedule appointments by calling the study counsellor or walking in on any clinic day for couple HCT. In both arms, if the man had not been reached 2 weeks after the enrolment of the woman, a phone call reminder was made and/or text message reminder sent to the woman to reschedule appointments. In both trial arms, male partners were enrolled after providing written informed consent, after which they were individually interviewed and then offered couple HCT. Male partners were considered not reachable if they had not been traced by the time the pregnant women were due for 6-week follow-up.
Prenatal and couple HCT were conducted according to Kenya National HIV AIDS and STIs Control Programme guidelines. Each woman's HIV status was known to the woman and provider following the enrolment visit but was only disclosed to their male partner after both had undergone couple HCT.
A 6-week follow-up visit either at home or at the clinic, as preferred by individual participant, was conducted to assess relationship status. Participants were reminded of their follow-up dates 2 weeks prior to the appointment through a phone call and short text message. Individuals were traced through cell phone contacts or home visits using the GPS coordinates and/or physical address. Loss to follow-up occurred if participants were not reached 2 weeks after their scheduled follow-up.
Study counsellors demonstrated to each study participant the correct use of a smartphone (Google Nexus S) for self-interview. Pregnant women underwent individual ACASI in a private room at the clinic. Invited male partners underwent ACASI at the clinic while those enrolled at home were interviewed at a private location within their homes. The interviews were conducted in the preferred language, either English or Dholuo (the local dialect), and obtained information on sociodemographics, reproductive health decisions, HIV risk factors and uptake of HIV prevention interventions. At follow-up, participants were interviewed either at home or in the clinic, on stability of their relationships and intimate partner violence
Randomization and blinding
An independent statistician used a computer-generated list of random numbers using Stata 11.0 (StataCorp, College Station, Texas, USA) statistical software in random blocks of 20 and a ratio of 1 : 1 to allocate study arms. The randomly generated numbers were contained in opaque sealed envelopes sequentially numbered with participant study identification numbers. The independent statistician was then called to issue the study arm corresponding to the random numbers.
The principal investigator and data analyst were blinded to the study arm. The study counsellors and women were unaware of the randomization assignment during enrolment, interviews and HCT. Postrandomization, it was not practical to blind the counsellors and study participants due to the nature of the study. Participating men adhered to the study arm randomly assigned to their female partners.
To detect a 50% increase in male partner tracing and uptake of couple HCT between the invited men and those visited at home, we determined that 268 pregnant women (134 per study arm) would provide at least 80% power assuming a two-sided test and type I error rate of 5%. We increased our sample size to 300 to account for approximately 10% loss to follow-up.
The primary study outcomes were number of male partners reached, interviewed and couple tested for HIV at 6 weeks. Secondary outcomes were male HIV status, couple serodiscordance, postcouple HCT relationship stability and intimate partner violence at follow-up.
Smartphone ACASI data were saved on an Open Data Kit (ODK) collect, then downloaded and submitted to an ODK aggregate database. Stored data were imported into Stata 12, which was used for analyses. The primary analysis was conducted on an intent-to-treat basis and included all randomized pregnant women. Chi-square tests were used to compare between trial arms: proportions of men who were interviewed and underwent couple HCT; baseline characteristics, including HIV prevalence, and intimate partner violence; and at follow-up the prevalence of relationship stability and intimate partner violence. Couple and male partner HIV status among those tested were compared using modified intention-to-treat analyses.
Institutional Review Boards at University of Washington, University of Nairobi and Kenyatta National Hospital approved the study protocol. All study participants provided written informed consent in either the local language (Dholuo) or English. The community advisory board provided oversight and advice. The study protocol was registered at ClinicalTrials.gov, registration number, NCT01620073.
Between July 2012 and February 2013, 495 women attending their first ANC visit were screened. Of the eligible 312 (63%) pregnant women, 300 (96.2%) were randomly assigned to home-based (n = 150) and clinic-based (n = 150) groups (Fig. 1). Among 183 ineligible women, reasons for ineligibility included known HIV positive prior to current pregnancy (n = 53), not planning to be in the area for at least 6 weeks (n = 32), single or separated women with no stable partner (n = 72), widows (n = 2), visitors or nonresidents (n = 8), already presented with their male partners or had previously undergone couple HCT in current pregnancy (n = 14) and negative urine pregnancy test (n = 2). Twelve (3.8%) of the eligible women were not enrolled because they wanted to consult their male partners (n = 5), were in a hurry (n = 4) or were participating in another study (n = 3).
The two groups had similar baseline characteristics (Table 1). Median age of women was 22 years (interquartile range 20–26 years) and 68.3% were aged 25 years or less. Overall, 48 (16%) of the 300 randomized women were HIV positive, 21 (14%) in the home-based arm and 27 (18%) in the clinic-based arm. About two-thirds (67.3%) had primary education or lower, and only 6% reported postsecondary level of education, while 95.7% were married of whom 91.3% were in monogamous partnerships. Most (74.7%) women reported a daily household income of less than $2, and the majority (74.3%) used cell phones daily. Whereas a substantial number of women (28.7%) perceived that their male partners had concurrent sexual relationships, only five (1.7%) women reported self-concurrent sexual partnerships. At enrolment, 23.0% of women reported being physically threatened by their male partner in the preceding 6 months and 2.7% experienced forced sex from their male partner in that same time period. Although interest in voluntary medical circumcision of male partner was high among women (>70%), only one-in-three women reported that their male partners were circumcised. Seventeen percent of women were primigravida, 28.7% primiparous and 54.3% multiparous. One woman in the home-based arm separated from her male partner for social reasons not related to couple HCT and was lost to follow-up.
Male partner access and uptake of couple HIV counselling and testing
A higher proportion of male partners were seen by healthcare workers in the home visit arm (n = 133, 88.7%) than in the clinic invitation arm (n = 55, 36.7%), P < 0.001) (Table 2). Similarly, a substantially higher proportion of women and their male partners underwent couple HCT at home (n = 128, 85.3%) than those in clinic (n = 54, 36.0%), P < 0.001). Male partners were more than twice as likely to be reached and to undergo couple HCT using the provider-initiated home HCT strategy compared with ANC clinic invitation (Table 2). Because far fewer men got tested in the clinic arm, more HIV-positive and more HIV-negative men were identified in the home-test arm. Eighteen (12%) male partners of 150 women in the home arm were HIV positive compared with 12 (8%) male partners of 150 women randomized to the clinic arm (P = 0.2). One hundred and ten (73%) male partners of women randomized to the home arm were HIV-negative compared with 42 (28%) women randomized to the clinic arm.
At the couple level, significantly more couples were likely to find out that they were HIV concordant negative if tested at home (66.0%) compared with clinic (26.0%). There was no difference in the proportions of couples who found out they were concordant positive (4.7% at home versus 5.3% at the clinic) (Table 2). However, couples were three times as likely to learn that they were HIV serodiscordant if they were in the home-based (14.7%) compared with the clinic arm (4.7%). Home visit arm participants were also significantly less likely to have undetermined couple HIV status (14.7%) compared with the clinic arm (64.0%).
Restricting analyses to the subset in each arm who underwent testing, the male partner HIV prevalence among couples tested at home was 14.1% (18 of 128) compared with 22.0% (12 of 54) of those tested at the clinic (P = 0.2) (Table 2). HIV serodiscordance was identified in 15.9% (29 of 182) of couples and was not statistically significantly different between the two arms: 17.2% in the home-based arm and 13.0% in the clinic-based arm (P = 0.477). Among the discordant couples, 15 HIV-negative women had HIV-positive partners, whereas 14 HIV-positive women had HIV-negative partners. Couples tested at the clinic were more likely to be HIV concordant positive (14.8%) than those tested at home (5.5%). Similar proportions of couples who underwent testing at home (77.3%) and at the clinic (72.2%) were concordant HIV negative.
Intimate partner violence and relationship stability
Intimate partner violence, reported as physical threats from male partners during the last 6 months, did not vary markedly at follow up from those reported at enrolment, (14.7 versus 22.7% at enrolment in home arm compared with 17.3 versus 24.0% at enrolment at the clinic) (Table 1 and Table 2). In each arm, 2% of women associated the physical threat they had experienced to couple HCT. Improved quality of the relationship was more than twice as likely to be reported by women whose partners were tested at home (67.1%), than those whose partners were tested at the clinic (28.4%) (Table 2, Fig. 2). However, when restricted to women whose partners were tested, this difference was not statistically significant [relative risk (RR) 1.10, 95% confidence interval (CI) 0.90–1.34, P = 0.329]. Worsening quality of relationships was not statistically significantly different between the study arms (4.0% at home versus 5.0% at the clinic) (Fig. 2).
In this randomized clinical trial among pregnant women seeking ANC in a high HIV prevalence setting, a strategy of home visit for couple HCT more than doubled the number of male partners reached and tested for HIV. The 85% rate of male partner access and couple HCT found in this study is the highest reported for male partners of pregnant women and substantially higher than that reported in previous studies that used community mobilization, written invitations, couple-oriented posttest HIV counselling or home-based door-to-door HCT [15,18,20,28]. There was high acceptability of home visits for couple HCT most likely due to couples HCT testing approach, which provided for confidentiality and sharing of results between partners, experience and flexibility of the counsellors, and prior door-to-door home-based HIV testing in the region . Home visits may overcome the challenges of accessing male partners and providing couple HCT. In this way, it could increase male partner involvement, lead to improved uptake of PMTCT, enhance infant HIV-free survival, increase detection of male HIV infection, accelerate access to treatment and potentially contribute to HIV prevention among women at risk by identifying HIV concordant negative and discordant couples [30–32]. In addition, increased male involvement may improve other maternal and child health outcomes such as skilled attendance at delivery and under-five mortality.
Intriguingly, tested couples in the clinic invitation arm were more likely to be concordant positive than those in the home visit arm and less likely to be HIV discordant. This suggests that HIV-infected men and couples who suspected or knew their HIV-positive status were more likely to come to clinic than those who did not know their status. On the contrary, the home visit captured all couples, including those in which risk was less. This is a key finding, as serodiscordant couples are at a high risk of heterosexual HIV transmission and maternal seroconversion during pregnancy and breastfeeding substantially increases the risk of MTCT [9,10,33]. Early initiation of antiretroviral therapy (ART) among HIV serodiscordant couples in whom the man is HIV positive can reduce sexual transmission, maternal HIV infection and MTCT . In contrast to other interventions, such as preexposure antiretroviral prophylaxis that have been minimally evaluated in pregnant/postpartum women due to concerns regarding foetal/infant safety, partner ART is an immediately implementable intervention to prevent maternal HIV infection during this high-risk period . In addition, home-based HCT may also reduce the high female–male heterosexual transmission during pregnancy because the male partner may support maternal uptake of ART and consistent use of condoms .
In this study, more men were newly diagnosed as HIV positive at home and referred for HIV care. Studies show that men are less likely to undergo HCT and more likely to present late for ART in part because they are less likely to undergo HCT [37,38]. Home visits for couple HCT during pregnancy may accelerate male partner HIV diagnosis and increase access to HIV care, reduce HIV mortality and morbidity, lower community HIV viral load and further reduce the risk of HIV transmission [22,31,39].
We did not find increased intimate partner violence or relationship instability among couples 6 weeks postenrolment. This is consistent with other studies that have not found increased risk of partner violence or relationship dissolution following couple HCT [15,28,40]. In fact, during follow-up, more women reported improved relationships following home-based than clinic-based couple HCT. Home visits for couple HCT during pregnancy were safe and did not negatively impact stable relationships in the short term. Larger and longer studies should monitor any intimate partner violence and relationship outcomes to confirm these findings.
In addition to being a randomized trial, our study had several strengths. The study was conducted in a rural setting where HIV prevalence is high and socioeconomic status is low. Nyanza has an HIV prevalence of 13.9%, which is more than twice the national average of 6.3% . In a recent study , Nyanza had the highest incident maternal HIV infection during pregnancy and breastfeeding compared with other sites (13.8 versus 6.8 per 100 woman-years). This finding therefore lends generalizability to other parts of sub-Saharan Africa that are hard-hit by the HIV epidemic where pregnant women have similar sexual partnerships. Second, the intervention was conducted after women had received initial ANC and did not interfere with other ANC activities. Therefore, implementing home visits for couple HCT may not require major programmatic changes. Another strength is that we achieved high retention rates that enabled a comprehensive evaluation of short-term outcomes. This may have resulted from male partner support, suggesting that home-based approach to couple HCT during pregnancy can improve short-term adherence. Our study limitations included the fact that we excluded women in unstable relationships whose risk of incident sexual and vertical HIV transmission may be higher. This did not markedly limit generalizability because the majority of women screened in this study were in stable relationships. The study did not address long-term outcomes, including incident maternal HIV, linkage to care, other maternal and child health outcomes or cost-effectiveness. These should be addressed in other studies in order to provide further information relevant to scaling up this intervention and assessing additional benefits to women, men and children.
In summary, in this randomized controlled study, provider-initiated home visits during pregnancy were well tolerated, acceptable, feasible and significantly increased the number of male partners who underwent couple HCT. As a strategy, provider-initiated home visits for couple HCT during pregnancy could have a major public health impact and contribute to the elimination of MTCT through enhanced uptake of PMTCT, especially in high HIV prevalence and low-resource settings. In addition, it may have the potential to improve other maternal, child and male partner health outcomes.
This study was supported by grant number D43 TW000007 from the Fogarty International Center of the National Institutes of Health and its contents are solely the responsibility of the authors and do not necessarily represent the official views of the Fogarty International Center or of the National Institutes of Health.
A.O.O., G.J.S., B.R. and C.F. designed the study and performed the analysis. All investigators contributed to data collection and writing of the manuscript, and all approved the final draft. A.O.O., G.J.S., B.R. and C.F. wrote the initial manuscript draft and vouch for the data analysis, interpretation and manuscript submission. The primary author is responsible for the completeness and accuracy of the data presented, as well as the adherence of this report to the study protocol.
Clinical Trials Number: clinicaltrials.gov NCT01620073.
Conflicts of interest
There are no conflicts of interest.
This study was presented at the 7th IAS Conference on HIV Pathogenesis, Treatment and Prevention in Kuala Lumpur, Malaysia, on 2 July 2013.
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© 2014 Lippincott Williams & Wilkins, Inc.
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