The Age 19 estimates come from the Elmira site, (a) Is based on group reading and math achievement test scores and is in percentile units, (b) Uses student self-reports on domains such as anxiety, depression, somatisation, and withdrawal to assess if students pass a clinical threshold, based on the Achenbach Child Behaviour Checklist (Achenbach and Rescorla, 2001). ( Attains 5% significance level. The Jamaican Supplementation Study (JSS) was one of the few with a long-term follow-up.9 Like NFP, JSS targeted health and parenting skills. This randomised programme consisted of a two-year nutritional and stimulation programme for stunted children (low height for age), aged 9-24 months at the start of the programme.