Identification of Pregnancies and Births, Surveillance for Illness
A pregnancy surveillance system has been established in all 5 study sites, with the aim of identifying newborns as soon as possible after birth. CHWs in DRC and Kenya, and CHEWs in Nigeria, visit all identified births on days 1, 3, 7, 14, 21, 28, 35, 42, 49 and 60 after birth. At each home visit, they assess the newborn for signs of illness and counsel the families on recognition of these signs (stopped feeding well according to the mother, reported convulsions, fast breathing, severe chest indrawing, temperature of ≥38.0°C or <35.5°C, movement only on stimulation, yellow soles or pus from umbilicus, eye or skin). Young infants with any of these signs are advised to go to a health center or hospital. Those who refuse referral or are unable to go to a facility are assessed by a study health worker.
Screening and Enrollment
Screening and enrollment are conducted by enrollment nurses. In DRC and Kenya, this takes place at the health center or dispensary. In Nigerian sites, it takes place at the child’s home. Young infants, 0–59 days of age, are eligible for inclusion in this study if:
* they have signs of clinical severe infection: not feeding well on observation, movement only when stimulated, severe chest indrawing and axillary temperature ≥38.0°C or <35.5°C;
* they have no exclusion criteria: very low weight (<1500 g at the time of presentation), hospitalization for illness in the last 2 weeks or previous inclusion in the study, any sign of critical illness (unconscious, convulsions, unable to feed at all, apnea, unable to cry, cyanosis, dehydration, bulging fontanel, major congenital malformations inhibiting oral antibiotic intake, active bleeding requiring transfusion, surgical conditions needing hospital referral and persistent vomiting [defined as vomiting after 3 attempts to feed the baby within 30 minutes]);
* their parents do not accept hospital referral; and
* their parents give consent to participate in the study.
The enrolled infants are classified into 2 age groups, 0–6 days and 7–59 days, and randomly assigned to 1 of the treatment regimens. The unit of randomization is the individual infant with randomization stratified by age group and study site. An age-stratified randomization scheme with block size of 8 was computer-generated off-site at WHO using STATA version 10.0 (STATA Corp LP, College Station, TX) by a person not involved with the study. For allocation concealment, treatment codes are printed on small pieces of cardboard pieces which are then folded once and sealed in sequentially numbered opaque envelopes (2 color-coded envelopes, one each for 0–6 days and 7–59 days age groups).
In the Kenyan and Nigerian sites, randomization is done centrally by a designated person who keeps the randomization envelopes. The enrollment nurse calls this person at the time of enrollment of a new infant, who opens the next envelope according to the age category and conveys the treatment allocation. This process takes place by phone and is confirmed by short message service. In DRC where mobile phone communication is not reliable, each facility where enrollment occurs is given a block of 8 envelopes for each age group, and used blocks are regularly replaced so that a sufficient number of envelopes are always available at the facility.
Intervention and Comparison Groups
* Treatment regimen A (reference treatment): injectable gentamicin once daily and injectable procaine penicillin once daily for 7 days (14 injections in total);
* Treatment regimen B: injectable gentamicin once daily and oral amoxicillin twice daily for 7 days (7 injections in total);
* Treatment regimen C: injectable gentamicin once daily and injectable procaine penicillin once daily for 2 days, thereafter oral amoxicillin for 5 days (4 injections in total);
* Treatment regimen D: injectable gentamicin once daily and oral amoxicillin twice daily for 2 days, thereafter oral amoxicillin twice daily for 5 days (2 injections in total).
All treatments are given at a health facility or at home. The injections are given once daily by a health worker at a facility or at home, whereas oral medicines are given by the mother under the supervision of CHWs at home. Daily assessments are conducted by health workers to identify any worsening of the child’s condition. Home visits to assess the outcome of the treatment are conducted by independent outcome assessment nurses at days 4, 8, 11 and15 after enrollment to detect treatment failure or relapse.
The rationale for selection, dosages and durations of antibiotics is given in detail elsewhere in this supplement.12 The combination of penicillin and gentamicin is used globally for treating presumed sepsis in the both neonatal period group and the second month of life.3,13–16 The combination of penicillin/amoxicillin and gentamicin targets common neonatal pathogens such as Escherichia coli, other enteric gram-negative rods and streptococci. The antibiotic dosages for young infants enrolled in the study are injection procaine penicillin in a dose of 50,000 units/kg once daily IM, injection gentamicin in the range 4.0–7.5 mg/kg/day once daily IM (depending on age of the young infant) and oral amoxicillin in suspension in a dose of 100 mg/kg/day (less than 2 kg are given 75 mg/kg/day), divided in 2 equal doses. All treatment regimens are being used for 7 days.
Provision of Treatment
In DRC and Kenya, all injectable treatment is provided at a health facility by the treatment nurse, who also provides the first daily dose of oral therapy. Mothers observe the first dose being given and are instructed to provide the second daily dose of oral amoxicillin at home in the same manner. In Nigeria, the first treatment (injectable or oral) after randomization is provided by the treatment nurse at the child’s home. Treatment on subsequent days is provided by CHEWs.
An independent outcome assessment nurse visits enrolled infants on days 4, 8, 11 and 15 after the day of the enrollment to assess outcome. All outcome assessments are conducted at the young infant’s home.
The primary outcome is treatment failure before or at the day 8 visit. Treatment failure is defined by any one of the following:
* Clinical deterioration (hospitalization, emergence of any sign of critical illness at any time or a new sign of clinical severe infection after the day 2 visit or reemergence of a sign of clinical severe infection on day 4 after initial disappearance).
* No improvement in clinical condition by day 4 (if there was a single sign of clinical severe infection at enrollment, persistence of the sign; if there were multiple signs at enrollment, persistence of >1 sign).
* Not cured by day 8 (persistence of any sign of clinical severe infection on day 8 of enrollment).
* Development of a serious adverse event (SAE) other than death that is thought to be related to the study antibiotics, for example, organ failure, anaphylactic reaction, severe diarrhea, disseminated and severe rash.
* Death between days 9–15 after enrollment.
* Relapse (after disappearance of all signs of clinical severe infection by day 8, emergence of any sign of critical illness or clinical severe infection between days 9–15 after enrollment).
* Adherence to the allocated treatment between days 1–8.
In the absence of population-based incidence data, the incidence of possible severe bacterial infection among neonates and young infants was conservatively assumed to be about 5% in Africa. This estimate was based on earlier studies conducted in Bangladesh and India where about 10–15% of all newborns had an illness with at least 1 sign of possible severe bacterial illness during follow-up,7,17,18 and 2 studies with more specific diagnostic criteria reported a lower incidence of possible severe bacterial infection of 7–10%.17,18
The sample size calculations were performed based on comparing the failure rates observed with treatment regimen A (reference treatment regimen: injection penicillin and gentamicin for 7 days) with the failure rates expected with the 3 experimental treatment regimens. For each comparison, the point estimate of the failure rate difference (experimental–reference treatment) between the 2 treatment regimens and its 2-sided 95% confidence interval will be calculated. The alternative treatment will be judged to be “of similar effectiveness” to the reference treatment A (assumed treatment failure rate 10%) if the upper bound of the 95% confidence interval of the difference lies below the allowed “similarity margin” of +5%. The required sample size for 90% power to demonstrate the similarity of 2 treatments assuming that the true failure rates with the reference treatment and the experimental treatment regimens will be identical (assumed to be 10%) works out to be 760 “analyzable” infants per arm who would be included in the prespecified per-protocol analysis. Assuming that approximately 15% of randomized infants will be excluded from the per-protocol analysis for failure to adhere treatment, the required sample size is 900 infants for each treatment regimen (a total of approximately 3600 infants).
Data collection is done by CHWs/CHEWs during home visits and includes data on all births as well as deaths within the first 2 months of life. The CHWs/CHEWs also screen young infants for illness. Data are collected on the paper-based standard case report forms that have been extensively field tested and revised after pilot testing. Enrollment nurses complete a screening form after examination for every sick young infant who was referred or brought to them by CHW/CHEW. They complete a baseline information form at enrollment for every enrolled infant. Daily treatment and assessment records are maintained by the treating health worker. The outcome assessment nurses complete an assessment form at days 4, 8, 11 and 15 days after randomization and when an infant is sent to them for assessment by the treating health worker because of suspected worsening of clinical condition. Names or other identifiers of the infant and his/her family are not included on the study forms. All completed forms are checked by study supervisors for completeness before they are entered into the computer.
Individual sites are responsible for their own day-to-day data management activities. Each individual site has its own data management team, including a data manager and team of data entry clerks. At each site, the data entry clerks enter data from paper forms into the data management system, which stores the data in a data base. The data management system consists of a front-end and a back-end. The front-end, prepared in C++, is the user interface that the data manager and the data entry clerks use to interact with the database, whereas the back-end in Structured Query Language stores the database itself. All data are double-entered and discrepancies verified to remove data entry errors. The data manager then proceeds to run range and consistency checks built into the data management system. After resolving all range and consistency errors in consultation with the data collection staff, the data manager checks for inconsistencies in information across different case report forms using inbuilt checks and resolves them in consultation with the field coordinators and if necessary with the principal investigators of the study.
The cleaned data are sent every month to the central data coordination center at London School of Hygiene and Tropical Medicine in London. Additional data quality checks are carried out, and feedback is provided to the study sites on a monthly basis.
The primary analysis will be a combined analysis across all the sites. Simple comparisons of means and proportions by treatment group will be used to check whether the randomization scheme has in fact resulted in baseline comparability of treatment groups. The primary analyses will be for equivalence between the reference treatment and the 3 experimental arms; it will consist of the comparison of proportions of infants with treatment failure in each treatment arm.
Analysis will be conducted on a per-protocol basis and on an intention-to-treat basis. Although the former is more conservative to establish equivalence of treatment regimens and will be the primary analysis for this study, the latter will take into account the possibility of differences in adherence to treatment across treatment arms despite the best efforts of the research team. In order for an enrolled infant to be included in the per-protocol analysis, he/she should have received: (1) all antibiotic doses due to be received for the first 3 days of treatment or by the time of treatment failure, and (2) at least 50% of all scheduled doses of each antibiotic on days 4 to 7 or by the time of treatment failure. Furthermore, for inclusion in the per-protocol analysis, treatment outcome should have been assessed among days 2–4, days 5–8 and vital status on day 8 known.
Each experimental regimen will be compared with the reference regimen and the difference in the risk of treatment failure together with 95% confidence intervals will be calculated. Analyses will be performed with data from all sites combining the 2 age subgroups, adjusted for any baseline covariates which were unbalanced at baseline and with the addition of dummy variables for site and age group.
Subgroup analysis of primary and secondary outcomes will be performed by age subgroups (0–6 days and 7–59 days at the time of enrollment). Univariate and multivariate regression analyses will be undertaken to identify clinical predictors of treatment failure and death despite antibiotic treatment.
The trial protocol and all associated data collection instruments and consent forms were approved by the local Institutional Review Boards, the WHO Ethical Review Committee and the Institutional Review Board of the London School of Hygiene and Tropical Medicine. The trial was registered as ACTRN12610000286044 with Australian New Zealand Clinical Trials Registry. The trial follows Council for International Organizations of Medical Sciences and Good Clinical Practice guidelines.
Communities in all sites were introduced to the study before initiation of enrollment. This was achieved through meetings with community leaders and with community groups. Informed written consent is obtained for the home visits for pregnancy and birth, enrollment, treatment as well as for follow-up visits of nonenrolled infants. Health workers were trained to facilitate referral through counseling using integrated management of childhood illness guidance for assisting referral. Only babies whose families refuse referral and are willing to document this by witnessed signature/thumbprint are enrolled.
Monitoring of Potential Adverse Events
The families are asked to contact the CHW/CHEW if any adverse events occur. In the case of a SAE, CHWs contact their supervising CHW and CHEWs contacts their outcome assessment nurse. The assessment nurse documents the adverse event and conveys this to the Community Coordinator/Supervisor. SAEs such as death, hospitalization, unable to pass urine for 12 hours, anaphylactic reaction, severe dehydration due to diarrhea, injection abscess or disseminated or severe rash are reported to WHO within 48 hours of their occurrence. This information is also provided on a regular basis to the Data Safety Monitoring Board (DSMB) and ethics committees.
At any time during the study follow-up, young infants identified as treatment failures according to the study protocol are referred to a hospital. If the parents refuse to take the infant to the hospital, the infant is offered rescue therapy (intramuscular ceftriaxone for 7 days).
Data Safety Monitoring Board
The DSMB is responsible for monitoring and assessing the safety of the trial and consists of an epidemiologist, a statistician and 1 clinician scientist/researcher from each of the 3 countries. The DSMB convenes at least once a year in a face-to-face meeting, which consists of both an open and a closed session. Two interim analyses will be conducted: when one third of participants and when two thirds of participants have been enrolled and treated.
The DSMB determined that the trial will be stopped or modified if an interim analysis shows that the proportion of neonatal deaths between treatment and control groups differ by at least 2 standard errors with a P value of 0.01. Furthermore, termination or modification may be recommended for any other perceived safety concern based on clinical judgment, including but not limited to a higher than anticipated rate for any component of the primary endpoint or unexpected SAEs. For this purpose, the SAE forms are sent to the DSMB on a quarterly basis.
Training of Health Workers
Training of health workers for the study was a 2-step process. Training sessions for “master trainers” from all sites were held using the WHO/UNICEF Home Care for Newborns course, the WHO/UNICEF Young Infant integrated management of childhood illness course (for study nurses) and a study-specific procedures course. These site-specific master trainers were experienced physicians and nurses; they subsequently trained all CHWs/CHEWs and nurses employed by the study. All supervisors and site coordinators were also trained in all courses.
Extensive standardization exercises were conducted for each cadre of study health workers. For CHW/CHEW standardization sessions, we identified 5–10 eligible young infants in a community or a nearby health facility and asked each CHW/CHEW to assess these infants while being observed by a trained facilitator. Assessments included weighing the child, assessing danger signs (ability to feed, convulsions, elevated respiratory rate, chest indrawing, high or low temperature, lethargy and yellow soles). The facilitator compared his/her findings with those of each health worker to identify errors. After the exercise, the trainees were given feedback; those needing further standardization were given targeted refresher training.
The same standardization process was used for all staff, including enrollment nurses, treatment nurses, outcome assessment nurses, health center nurses, supervisors and coordinators. These healthcare workers were all trained to identify signs of critical illness. Standardization exercises were conducted at the start of the study and subsequently every 3–6 months for all health workers to ensure that all of them assessed clinical signs in a similar way.
Supervised, accompanied visits and independent, unaccompanied visits are carried out regularly by the supervisors. Principal investigators and coinvestigators also make random visits to study sites to check quality.
Monthly progress reports are prepared by all sites, sent to the WHO coordinating center for the study and reviewed critically on a monthly basis. Regular conference calls are held to discuss the progress of the trial. Data-based monitoring, as well as verification of SAE forms, is carried out by the data coordination center in collaboration with the WHO study coordination team.
WHO technical staff conducts at least 2 monitoring visits to each site every year. A detailed structured review of study implementation is conducted at each visit. The key areas that are monitored included the recruitment rate, clinical practices such as identification of danger signs and critical signs, detection of treatment failure as well as data management and overall study procedures. All study documentation is checked. A proportion of completed case report forms, all treatment failures and all adverse events are reviewed. Recommendations arising from the site visit are discussed with the Principal Investigators at the sites and followed up for action. Monitoring visits are also conducted by external monitors who are not associated with the study.
The project is being coordinated by the WHO Department of Maternal, Newborn, Child and Adolescent Health. Technical advice is provided by a Technical Advisory Group, which includes all principal investigators, the WHO coordination team and external experts, and convenes at least once a year in a face-to-face meeting. London School of Hygiene and Tropical Medicine assists in quality control through database monitoring, prepares necessary reports for the DSMB, Trial Advisory Group and liaises with WHO study coordination team.
The enrollment of study participants began in April 2011 at all study sites and is likely to be completed by May 2013.
Evaluation of simpler treatment regimens for severe neonatal infection has been identified as an important global research priority to prevent neonatal mortality.20 The current WHO recommendation for treatment of severe neonatal infection in neonates and young infants is hospitalization and treatment with injectable penicillin (benzyl penicillin or ampicillin) plus gentamicin for at least 10 days, requiring 50 injections.3 In practice, these guidelines are rarely implemented in many low resource settings, due to inadequate referral systems or parental refusal of referral.
The simplest safe and effective antibiotic regimen for treating possible severe bacterial infection in young infants is unknown. Although 7 days of treatment with once daily procaine penicillin and gentamicin injections appears to be safe and effective, this still involves 14 injections, which may also be difficult in some settings.7 If a simpler treatment option—that is, one that is shorter in duration and requires fewer injections—was shown to be safe and effective, it would make treatment more accessible, acceptable and less expensive for families. Furthermore, such simpler treatments could be provided at first-level health facilities, at outpatient facilities and possibly even at home by trained health workers and would contribute substantially to increasing coverage of antibiotic therapy.
The ongoing trial described in this article is a multicenter study involving 5 sites in 3 countries in Africa. It is the largest community-based study evaluating simplified antibiotic regimens for clinical severe infection in neonates and young infants. The study is an individually randomized trial, which is the most rigorous design for comparing treatment regimens. Blinding of therapy was not possible because of the differences in delivery of the regimens. Although there is an element of subjectivity involved in the assessment of treatment failure based on the presence or absence of clinical signs, an independent outcome assessor who is blinded to the treatment regimen assesses the study outcome.
This study in 3 African countries, combined with 2 similar ongoing studies in Bangladesh and Pakistan, will provide evidence on the simplified antibiotic regimen for treatment of sepsis in outpatient settings where referral is not possible. This evidence will be generalizable to Africa and South Asia and will allow development of global policy to manage severe bacterial infections in young infants.
The other members of the study group mentioned below have contributed to the study, and we therefore acknowledge their substantial inputs. DRC: Serge Ngaima, Justin Ga’do, Daniel Ishoso, Kalonji Michel and John Otomba. Kenya: David Muyodi, Millsort Robins, Judith Sitti, Robin Achoki, Evelyn Etemesi, Lydia Chebet, Enock Nyambane, Sylvia Nyabera, Moses Sitati, Edwi Kirwa, Peter Nandikove, Priscah Mosol and Francisca Lagat. Ibadan, Nigeria: Akintunde Sowunmi, Elijah Afolabi Bamgboye, Ayotunde Olajide, Seye Idris, Mrs. Olumide Ovigwe, Nathanael Afolabi, Joseph Aderibigbe, Bukola Adeniji, Ronke Egunjobi and Olaide Olakehinde. Ile-Ife, Nigeria: Prof. Adetanwa Odebiyi, Dr. Olapeju Esimai, Olufolake Akano, Christiana Olufunke Olagoke, Tosin Ogunsola, Aminat Subair, Jumoke Awoyemi and Olusanjo Oyedokun. Zaria, Nigeria: Clara L. Ejembi.
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neonates; young infants; antibiotic treatment; sepsis; severe infection© 2013 by Lippincott Williams & Wilkins, Inc.