The cohort – the North Carolina Health Project (NCHP) research cohort –was developed by faculty of the University of North Carolina at Chapel Hill (UNC),
in collaboration with the North Carolina Academy of Family Physicians, for
the purpose of facilitating research on chronic disease and related health
care problems commonly addressed in primary care settings.
During the initial cohort enrollment (16 practice sites,
2001), 7,687 adult patients had appointments at the study practices. Of these,
2,921 were not enrolled, largely because they refused study participation.
The remaining 4,766 (62%) completed the enrollment questionnaire, of whom
4054 (85% of those completing the questionnaire; 53% of eligible subjects)
consented to be included in the cohort (i.e., to be approached for additional
Table on Cohort Characteristics
In the second wave of cohort recruitment (five practice sites, 2004), 1935
new subjects were successfully enrolled (65.3 % of eligible patients). Of
these, 1411 (72.9% of enrollees, and 47.6% of all eligible subjects) agreed
to be contacted for further studies.