Representativeness of an HIV cohort of the sites from which it is recruiting: results from the Ontario HIV Treatment Network (OHTN) cohort study

Table 3 Multivariable generalized logit regression model of not participating in the study

Characteristics	OCS participation	OR (9% CI)	p value
Site
UHN (ref.)		1
MLMC	Declined	0.02 (0.007,0.05)	<.0001
MLMC	Not Approached	0.025 (0.01,0.05)	<.0001
OGH	Declined	0.37 (0.24,0.58)	<.0001
OGH	Not Approached	0.80 (0.58,1.09)	0.15
WRH	Declined	0.12 (0.01,0.34)	<.0001
WRH	Not Approached	1.86 (1.31,2.63)	0.0004
Age (per 10 years)	Declined	0.98 (0.82,1.18)	0.86
	Not Approached	0.98 (0.86,1.12)	0.79
Gender
Female (ref.)		1
Male	Declined	1.28 (0.81,2.02)	0.29
Male	Not Approached	1.14 (0.79,1.64)	0.48
Risk factor†
MSM	Declined	0.31 (0.20,0.45)	<.0001
MSM	Not Approached	0.30 (0.21,0.46)	<.0001
IDU	Declined	0.53 (0.26,1.08)	0.08
IDU	Not Approached	0.59 (0.37,0.97)	0.04
Heterosexual	Declined	0.70 (0.43,1.14)	0.15
Heterosexual	Not Approached	0.59 (0.39,0.89)	0.01
Born in Canada	Declined	0.62 (0.43,0.90)	0.012
Born in Canada	Not Approached	0.87 (0.65,1.16)	0.35
Years since HIV+ test (per year)	Declined	0.95 (0.93,0.98)	0.0007
Years since HIV+ test (per year)	Not Approached	0.94 (0.92,0.96)	<.0001
On cART	Declined	0.61 (0.39,0.97)	0.04
On cART	Not Approached	0.91 (0.64,1.31)	0.62
VL <50 copies/mL	Declined	1.28 (0.81,2.02)	0.29
VL <50 copies/mL	Not Approached	0.59 (0.42,0.82)	0.002
CD4 count (cells/mm³)
>500 (ref.)		1
200-500	Declined	1.11 (0.78,1.58)	0.56
200-500	Not Approached	1.02 (0.77,1.33)	0.92
<200	Declined	2.20 (1.29,3.75)	0.004
<200	Not Approached	1.51 (0.93,2.15)	0.11

UHN University Health Network, MLMC Maple Leaf Medical Clinic, MSM men who have sex with men, IDU injection drug use, cART combination antiretroviral therapy, VL viral load.
† HIV risk factors are not mutually exclusive.

ISSN: 1471-2288