. Author manuscript; available in PMC: 2010 Jun 25.

Published in final edited form as: Cancer Epidemiol Biomarkers Prev. 2008 Sep;17(9):2238–2243. doi: 10.1158/1055-9965.EPI-08-0254

Table 1.

Socicodemographic and clinical differences between participants and nonparticipants and their infants in the final cohort

Variable	Participants, mean (SD) or % (n = 1,424)	Nonparticipants, mean (SD) or % (n = 1,737)	P^*
Maternal age (y)	24.96 (6.09)	23.67 (5.87)	<0.01
Marital status (% married)	90.10	88.72	0.21
Infant sex (% female)	48.12	47.54	0.75
Birth-weight (g)	2,972.52 (503.55)	2,916.48 (538.18)	<0.01
Apgar 5 min	8.93 (0.44)	8.75 (1.10)	<0.01
Maternal HIV-1+/HHV-8+ (%)	17.06	13.80
Maternal HIV-1+ (%)	35.39	22.72
Maternal HHV-8+ (%)	18.89	11.88
Maternal HIV-1−/HHV-8− (%)	28.65	51.59	<0.01

χ² and t tests were used to test for significance.