Study Design
25 Years of Longitudinal Science
SC2 is the third wave of a programme anchored in the AHRI Health and Demographic Surveillance System area.
Wave 1
VTS / Mamanengane
2001–2006 · Ages 0–2
n ≈ 1,194 · Exclusive breastfeeding intervention
n ≈ 1,194 · Exclusive breastfeeding intervention
Wave 2
Siyakhula Cohort 1
2012–2014 · Ages 7–11
n = 1,536 · Cognitive & behavioural assessments
n = 1,536 · Cognitive & behavioural assessments
Wave 3 · Current
Siyakhula Cohort 2
2026–2030 · Ages 18–24
Adolescent Mental Health outcomes
Adolescent Mental Health outcomes