Table 2.

Factors associated With C. trachomatis and N. gonorrhoeae infections: results from multivariate logistic regression analysis

Independent factor	Gonorrhoea	Chlamydia
Working in low-tier venuesa	—	1.39 (1.07–1.81)*
Being 21–25 years oldb	—	0.60 (0.48–0.76)**
Being 26–30 years oldb	—	0.29 (0.21–0.40)**
Being 31 years or olderb	—	0.35 (0.26–0.47)**
Having gonorrhoeac		1.91 (1.35–2.70)**
Having chlamydiad	1.99 (1.43–2.79)**	—

* P<0.05; ** P<0.01.

^a Reference group was FSWs working in high-tier venues.

^b Reference group was FSWs aged 20 years or younger.

^c Reference group was FSWs having not gonorrhoea.

^d Reference group was FSWs having not chlamydia.