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. Author manuscript; available in PMC: 2012 Dec 1.
Published in final edited form as: Biometrics. 2011 Apr 2;67(4):1583–1593. doi: 10.1111/j.1541-0420.2011.01582.x

Table 2.

Demographics characteristics and experiences of children in the CAMPCS with IL10 cytokine SNP information. Continuous variables are summarized with the 10th, 25th, 50th, 75th, and 90th percentiles of their distributions, subjects per city with frequencies, and other categorical variables with proportions

Number of children 476
City
 Albuquerque 44
 Baltimore 64
 Boston 59
 Denver 53
 San Diego 42
 Seattle 68
 St. Louis 76
Toronto 70
Baseline age (years) 12.2, 13, 14.3, 15.6, 16.4
Female 0.36
Race
 White 0.75
 Black 0.10
 Hispanic 0.07
 Other 0.08
Follow-up visits 6, 7, 7, 8, 8
Years of follow-up 1.6, 1.8, 1.9, 1.9, 2.0
Physician seen for symptoms (as a proportion of visits) 0.1
Physcian never seen for symptom (as a proportion of children) 0.6
Two copies of minor allele T on locus 6 of the IL10 cyt0kine 0.3