Table 2.

Characteristics Associated with Study Retention among 1,636 Participants over 73,609 Person-Months, UNC CFAR HIV Clinical Cohort, 2001–2007^a

Characteristic	Crude hazard ratio for study retention	95% CLb	Adjusted hazard ratiocfor study retention	95% CLb	Adjusted, weighted hazard ratioc,dfor study retention	95% CLc
Age, per 10 years	1.14	1.03, 1.27	1.12	1.00, 1.25	1.12	1.00, 1.26
Female sex	1.02	0.83, 1.26	1.15	0.89, 1.48	1.15	0.88, 1.48
African-American race	0.99	0.82, 1.21	1.04	0.84, 1.28	1.06	0.86, 1.31
Intravenous drug use	1.00	0.76, 1.32	1.04	0.77, 1.41	1.01	0.75, 1.37
Male homosexuale	1.05	0.86, 1.28	1.21	0.94, 1.55	1.23	0.96, 1.58
Urban areaf	0.83	0.67, 1.04	0.70	0.55, 0.88	0.70	0.55, 0.89
Distance to clinic, per 50 miles	0.79	0.70, 0.89	0.74	0.66, 0.84	0.73	0.65, 0.83
Insurance
Private vs. none/other	1.52	1.20, 1.94	1.46	1.14, 1.86	1.47	1.15, 1.89
Publicg vs. none/other	1.26	1.01, 1.59	1.31	1.03, 1.66	1.31	1.04, 1.67
First HIV care at UNC	1.41	1.16, 1.72	1.49	1.22, 1.83	1.49	1.21, 1.82
CD4 count, cells/mm3
>350 vs. <200	0.98	0.75, 1.27	0.86	0.64, 1.15	0.86	0.64, 1.16
200–350 vs. <200	0.80	0.59 1.09	0.74	0.54, 1.02	0.74	0.54, 1.03
Viral load, copies per ml
>10,000 vs. <400	0.51	0.41, 0.64	0.52	0.40, 0.66	0.52	0.40, 0.67
400–10,000 vs. <400	0.56	0.43, 0.71	0.58	0.45 0.75	0.58	0.45, 0.75
AIDS	1.41	1.13, 1.76	1.30	1.03, 1.64	1.27	1.00, 1.61
cART use	1.39	1.08, 1.80	1.20	0.91, 1.58	1.21	0.92, 1.59

^aHazard ratios and confidence limits for study drop out were inverted.

^bCL, confidence limits.

^cAdjusted for variables present in the table.

^dWeighted by the inverse probability-of-censoring due to death.

^eCompared to male heterosexuals.

^fUrban area defined as >500,000 people in the metropolitan statistical area, compared to less populated areas.

^gMedicaid or Medicare.