Table 3.

Biological outcomes by peer group or collective membership status: IBBA, 2005–2008.

Predictor	Gonorrhoea and/or Chlamydia	Syphilis	HIV infection
Membership in peer group or collective
No (N = 2937)	9.6	10.3	18.6
Yes (N = 1762)	5.2	8.2	16.9
Significance (χ2)	<0.001	0.05	0.17
Adjusted OR (95% CI)a,b	0.603 (0.468, 0.777)	0.741 (0.583, 0.940)	0.890 (0.741, 1.069)
p-Value	<0.001	0.01	0.11

Notes: ^aThe reference category for the logistic regression model was no membership in a peer group or collective.

^bThe Model was adjusted for all of the socioeconomic and sex work characteristics mentioned in Table 1.