. Author manuscript; available in PMC: 2017 Jul 1.

Published in final edited form as: Immunogenetics. 2016 May 3;68(6-7):391–400. doi: 10.1007/s00251-016-0914-1

Table 1.

Distribution of Demographic Characteristics for SAGE II Participants

Characteristics		Cases (812)	Controls (415)	P-Value¹
Age, yrs²		13.6 (10.9-16.8)	16.4 (12.8-18.8)	< 0.001
Gender (% Female)		47.2 (43.7-50.6)	56.1 (51.4-60.9)	0.003^#
Body Mass Index³	Obese	268	70	0.002
Body Mass Index³	Non-Obese	523	219	0.002
African Ancestry²		82.0 (77.0-87.0)	82.0 (76.0-87.0)	0.810

P-values presented are from the Wilcoxon Rank Sum test with the exception of BMI (Chi-square test)

Median (interquartile range)

Participants > 20 years of age with BMI ≥ 30 were classified as obese; participants < 20 years of age with BMI ≥ 95^th age- and gender-specific percentile were classified as obese. All other participants were classified as non-obese; frequencies in cases and controls are presented.

P-value is calculated from difference in proportions test