Table 3.

Factors associated with N. gonorrhoeae incidence in univariate analysis (N=792)

Demographic and behavioral characteristics		HR (95% CI)
Age (years)	16–20	1.0
	21–25	0.5 (0.22–1.07)
	26–52	1.0 (0.54–1.69)
Ethnicity	Han	1.0
	Other	1.3 (0.76–2.18)
Place of registered permanent Residence	Local city	1.0
	Other cities in Yunnan	1.2 (0.65–2.10)
	Outside Yunnan	0.9 (0.44–2.03)
Education level	≤6 years	1.0
	>6 years	0.5 (0.33–0.90)
Marital status	Married or cohabitation	1.0
	Single, separated, divorced, or widowed	1.0 (0.61–1.77)
Commercial sex venue	Lower risk	1.0
	Higher risk	3.1 (1.88–5.17)
Residence type	Apartment	1.0
	Family home	0.7 (0.30–1.64)
	Brothel or other working location	1.5 (0.81–2.71)
Drug use (ever)	Non-drug user	1.0
	Non-injection illegal drug user	1.0 (0.42–2.63)
	Injection drug user	0.9 (0.44–1.82)
Drinks alcohol	No	1.0
	Yes	0.5 (0.29–0.78)
Duration of commercial sex work (years)	<2	1.0
	2–5	1.1 (0.60–1.86)
	≥5	0.7 (0.36–1.43)
Age at sexual debut (years)	<18	1.0
	≥18	0.6 (0.37–1.01)
Age at initiation of commercial sex work (years)	≥20	1.0
	<20	0.9 (0.54–1.55)
Number of clients in previous week	<7	1.0
	≥7	1.7 (1.01–3.02)
Always used condom with clients in previous week	Yes	1.0
	No	2.7 (1.57–4.60)
Had regular sexual partner	No	1.0
	Yes	0.8 (0.50–1.36)
Always used condom with regular partner in previous week	Yes	1.0
	No	0.8 (0.35–1.77)
Fee per service	≥100 RMB	1.0
	<100 RMB	1.6 (0.95–2.56)
Vaginal douching	No	1.0
	Yes	1.1 (0.55–2.14)
HIV sero-positivity	No	1.0
	Yes	1.5 (0.79–2.90)
HSV-2 sero-positivity	No	1.0
	Yes	1.8 (0.97–3.41)
C. trachomatis positive	No	1.0
	Yes	1.8 (1.02–3.11)
T. vaginalis positive	No	1.0
	Yes	1.0 (0.38–2.38)
Syphilis positive	No	1.0
	Yes	1.0 (0.39–2.40)