Individual Study / Dalal et al.; Glob Health Action. 2015

Feasibility of a large cohort study in sub-Saharan Africa assessed through a four-country study

Feasibility of a large cohort study in sub-Saharan Africa assessed through a four-country study

Initiatives -
A pilot study with the primary objective of determining the feasibility of enrolling and following persons for future long-term cohort studies on NCDs in Nigeria, South Africa, Tanzania, and Uganda, and to gather information on self-reported diagnoses of selected communicable and NCDs, their risk factors, injuries, mental health, and diet Note: All published information has been collected from the article referenced in the Marker Paper box below. Therefore, there may be variations with more advanced versions of the study.
Start Year
2011
Funding
This work was funded by a grant from the Dean's office of the Harvard School of Public Health, the Harvard School of Public Health Department of Nutrition, and Karolinska Institutet Distinguished Professor Award to Prof. Hans-Olov Adami (Dnr: 2368/10–221). The authors thank Dr. Walter Willett for his funding support and input in developing the Food Frequency Questionnaire and Megan Diamond for data management assistance.

Design

Study design
Population cohort

Marker Paper

Dalal S, Holmes MD, Laurence C, et al. Feasibility of a large cohort study in sub-Saharan Africa assessed through a four-country study. Glob Health Action. 2015;8:27422. Published 2015 May 25. doi:10.3402/gha.v8.27422

PUBMED 26015082

Recruitment

Sources of Recruitment
  • Individuals

Number of participants

Number of participants
1,415
Number of participants with biosamples

Access

Availability of data and biosamples

Data
Biosamples
Other

Supplementary Information

Participants reported that they would be willing to provide samples of blood (993 of 1213 respondents; 82%), saliva (843/1142; 74%), urine (841/1126; 75%), nails (624/1028; 61%), and hair (557/984; 57%) in future research.

Timeline

Population

Participant eligibility criteria were adults aged 18 years or older, and for the professional cohorts, were additionally those employed in schools (South Africa and Tanzania) or hospitals (Nigeria) at the time of data collection
Selection Criteria
Minimum age
18
Newborns
Twins
Countries
  • Nigeria
  • Uganda
  • Tanzania
Ethnic Origin
Health Status
Other criteria
Retired teachers and those due to retire in the following 6 months were excluded.

Recruitment

Sources of recruitment
  • General population

Number of participants

Number of participants
1,415
Number of participants with biosamples
Data Collection Event
Teachers who indicated at baseline that they were willing to complete a follow-up questionnaire after 6 months received this by email or post according to their preference. Participants were reminded by phone, SMS, and email to return their documents.
Start Date
2011-05
End Date
2011-09
Data sources
  • Mobile data collection
    • Mobile phone
    • Smartphone