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

Published in final edited form as: AIDS Behav. 2016 May;20(5):1017–1025. doi: 10.1007/s10461-015-1186-8

Table II.

Differences by Sample Characteristics in HIV Testing and Treatment Behaviors among Key Populations in Tijuana, Mexico (N=191)

Measured Behaviors	Observed Differences
Measured Behaviors	Sample Method	Gender^†	MSM	PWID	SW	SW-PWID

Previously tested for HIV	χ²=4.813 ^**	χ²=0.979	χ²= 8.141 ^*	χ²= 12.105 ^**	χ²= 2.253	χ²= 0.051
	p=.028	p=.323	p=.004	p=.001	p=.133	p=.822
	n=191	n=185	n=184	n=189	n=179	n=179
	Community (78/173), 45.1%	Female (47/95), 49.5%	MSM (26/38), 68.4%	PWID (43/116), 37.1%	SW (43/81), 53.1%	SW-PWID (20/44), 45.5%
	Clinic (13/18), 72.2%	Male (38/90), 42.2%	non-MSM (62/146), 42.5%	non-PWID (46/73), 63.0%	non-SW (41/98), 41.8%	non-SW-PWID (64/135), 47.4%
Knew HIV+ status	χ²=10.497 ^**	χ²=5.152 ^**	χ²= 0.080	χ²= 1.305	χ²= 0.138	χ²= 0.022
	p=.001	p=.023	p=.777	p=.253	p=.711	p=.881
	n=95	n=89	n=91	n=93	n=88	n=88
	Community (16/82), 19.5%	Female (8/49), 16.3%	MSM (6/27), 22.2%	PWID (14/47), 29.8%	SW (9/45), 20.0%	SW-PWID (5/22), 22.7%
	Clinic (8/13), 61.5%	Male (15/40), 37.5%	non-MSM (16/64), 25.0%	non-PWID (9/46), 19.6%	non-SW (10/43), 23.3%	non-SW-PWID (14/66), 21.2%
Ever linked to HIV care	χ²=3.471	χ²=0.038	χ²= 2.141	χ²= 4.212 ^**	χ²= 4.163 ^*	χ²= 1.145
	p=.062	p=.846	p=.143	p=.040	p=.041	p=.228
	n=39	n=38	n=37	n=38	n=34	n=34
	Community (21/31), 67.7%	Female (15/20), 75.0%	MSM (5/5), 100.0%	PWID (19/29), 65.5%	SW (14/16), 87.5%	SW-PWID (10/12), 83.3%
	Clinic (8/8), 100.0%	Male (13/18), 72.2%	non-MSM (22/32), 68.8%	non-PWID (9/9), 100.0%	non-SW (10/18), 55.6%	non-SW-PWID (14/22), 63.6%

Based on available behavioral HIV data, participants across the pooled sample could be classified as follows: Community-derived (n=173; referent) vs. clinic-derived (n=18) sampling methods; Gender represented as female (n=95; referent) vs. male (n=90); MSM (n=38) vs. non-MSM (n=146), missing data (n=7); PWID (n=116) vs. non-PWID (n=73), missing data (n=2); sex workers regardless of gender (SW; n=81) vs. non-SW (n=98), missing data (n=12); SW-PWID (n=44) vs. non-SW-PWID (n=135), missing data (n=12). Proportions of each sub-group engaged in the target behavior are presented as: [(n₁/N_total), %].

^**

indicates a significantly smaller proportion of the referent group engaged in the behavior.

indicates a significantly larger proportion of the referent group engaged in the behavior.

^†

Due to limited statistical representation, analysis of observed differences by gender excludes persons who identify as transgender (n=6 male-to-female).