TABLE 3.

Multivariable negative binomial models assessing factors associated with the number of years different between the HIV diagnosis year collected by patient report, recorded in the medical record and the North Carolina HIV/AIDS Reporting System. Exponentiated parameter estimates represent the ratio of years different for two covariate levels.

Characteristic	Year of Diagnosis Comparison, Ratio (95% CI)
	Patient Report vs. Medical Record	Patient Report vs. HIV/AIDS Reporting System	Medical Record vs. HIV/AIDS Reporting System
Gender and sexual preference
Female	0.82 (0.43, 1.56)	0.76 (0.42, 1.42)	0.66 (0.49, 0.90)*
Heterosexual male	Referent	Referent	Referent
MSM	1.13 (0.61, 2.10)	0.96 (0.53, 1.72)	0.78 (0.57, 1.07)
Race
Black, non-Hispanic	Referent	Referent	Referent
White, non-Hispanic	0.76 (0.42, 1.38)	1.61 (0.96, 2.71)	1.15 (0.87, 1.51)
Hispanic	--	0.46 (0.07, 3.12)	0.66 (0.36, 1.20)
Other race	0.77 (0.15, 3.92)	0.73 (0.15, 3.64)	0.77 (0.38, 1.54)
Year of Diagnosis
1985–1989	3.31 (1.40, 7.83)	2.84 (1.32, 6.11)	6.91 (4.42, 10.80)*
1990–1994	1.56 (0.85, 2.85)	1.36 (0.79, 2.34)	1.89 (1.37, 2.61)
1995–1999	Referent	Referent	Referent
2000–2004	1.27 (0.59, 2.70)	1.09 (0.56, 2.12)	0.57 (0.41, 0.78)
2005–2007	--	0.68 (0.08, 5.73)	0.40 (0.25, 0.65)
Age at diagnosis
<25	1.04 (0.50, 2.15)	0.86 (0.43, 1.72)	0.92 (0.66, 1.28)
25–34	Referent	Referent	Referent
35–44	0.70 (0.37, 1.31)	1.19 (0.69, 2.06)	1.27 (0.94, 1.72)
45–54	1.31 (0.56, 3.11)	0.86 (0.38, 1.94)	1.10 (0.74, 1.62)
≥55	0.95 (0.21, 4.36)	1.61 (0.42, 6.16)	0.86 (0.39, 1.88)
IDU
Yes	1.03 (0.56, 1.91)	1.39 (0.81, 2.39)	1.25 (0.89, 1.75)
No/Unknown	Referent	Referent	Referent
Health Insurance
None	1.82 (0.84, 3.95)	0.75 (0.39, 1.43)	1.15 (0.84, 1.57)
Public	1.64 (0.76, 3.55)	0.49 (0.25, 0.96)	1.03 (0.75, 1.41)
Private	Referent	Referent	Referent
Other	3.09 (1.16, 8.27)	0.66 (0.26, 1.65)	1.08 (0.65, 1.80)

CI: Confidence Interval

^*P<0.05 for likelihood ratio test of this variable (all levels)