Correction: Changes in Prevalence of HIV or Syphilis among Male Sex Workers and Non-Commercial Men Who Have Sex with Men in Shenzhen, China: Results of a Second Survey

There are errors in Tables 3 and 4, and corresponding errors in the Results section under the subheading “Factors correlated with HIV infection of MSWs and ncMSM.” Please see the corrected Tables 3 and 4 here.

Table 3. Estimated HIV risk/prevention behavior in MSWs and ncMSM.

	MSWs (n = 489)				ncMSM (n = 476)
	COR (95%CI)	P	AOR (95%CI)	P	COR (95%CI)	P	AOR (95%CI)	P
Syphilis infection	10.2 (2.9,35.5)	0.000	9.0 (2.4,33.5)	0.001	5.6 (3.3,9.6)	0.000	5.9 (3.2,10.9)	0.000
Ever diagnosed with STIs	12.1 (1.2,124,3)	0.036	13.9 (1.5,134.6)	0.045	1.0 (0.5,2.3)	0.911	1.3 (0.5,3.4)	0.557
Tested for HIV	3.4 (1.2–9.8)	0.026	2.8 (0.7,11.1)	0.152	0.4 (0.2,0.6)	0.000	0.4 (0.2,0.7)	0.001
Condom use with male sex partner	0.3 (0.1,0.8)	0.022	0.3 (0.1,0.9)	0.046	0.8 (0.5,1.4)	0.488	0.7 (0.4,1.5)	0.485
Anal sex role (both)	9.2 (1.9,43.8)	0.006	3.6 (0.4,32.3)	0.251	0.7 (0.3,1.4)	0.323	-	-
Younger in age(<20)	0.3 (0.1,1.6)	0.179	0.3 (0.1,2.6)	0.280	0.6 (0.4,0.9)	0.048	0.6 (0.3,1.2)	0.181
Lower education (Junior high school or less)	2.1 (0.3,17.3)	0.491	7.6 (0.4,160.9)	0.191	2.6 (1.4,4.7)	0.002	2.1 (1.0,4.2)	0.049
First sex partner (male)	1.1 (0.3,3.4)	0.921	5.2 (0.9,31.7)	0.072	2.1 (1.3,3.4)	0.003	2.1 (1.2,3.9)	0.014

OR, odds ratio

COR, crude OR

Variables included in the multiple logistic regression model: HIV/syphilis infection, age, education, sex role, history of HIV test, history of STIs, condom use, first sex partner

AOR, adjusted OR, adjusted for other variables listed in the text

STI, sexually transmitted infection

Significant results are in bold (P<0.05)

Table 4. Factors correlated with combined HIV infection.

Characteristics	HIV+/total	Univariate		Adjusted for MSM type
		OR (95%CI)	P	OR (95%CI)	P
Syphilis-positive
No	55/860	1		1
Yes	39/105	8.6 (5.3,14.0)	0.000	6.1 (3.7,10.1)	0.000
Ever diagnosed with STIs
No	85/915	1		NS
Yes	9/50	2.1 (1.0,4.6)	0.048	NS
Age, years
<20	2/23	1		1
20–29	36/639	0.6 (0.1,2.7)	0.539	NS
≥30	56/303	2.3 (0.5,10.4)	0.250	NS
Education
Junior high school or less	32/219	1		1
Senior high school	41/448	0.6 (0.4,0.9)	0.035	NS
College or above	21/298	0.4 (0.2,0.8)	0.006	0.3 (0.2,0.5)	0.000
Employment
Full-time employed	80/848	1		1
Unemployed/part-time/retired	12/104	1.3 (0.7,2.4)	0.494	NS
Student	2/13	1.7 (0.4,8.0)	0.474	NS
Monthly income, RMB
≤3000	24/174	1		1
3001–5000	49/402	0.9 (0.5,1.5)	0.595	NS
>5000	21/389	0.4 (0.2,0.7)	0.001	NS
Marital status
Unmarried	64/810	1		1
Married	30/155	2.8 (1.7,4.5)	0.000	NS
Sexual orientation
Gay	54/631	1		1
Biosexual	26/147	2.3 (1.4,3.8)	0.001	1.8 (1.1,3.0)	0.033
Heterosexual or unsure	14/187	0.9 (0.5,1.6)	0.641	NS
Anal sex role
Insertive only	32/406	1		1
Receptive only	13/90	1.9 (0.9,3.9)	0.053	NS
Both	49/469	1.4 (0.9,2.2)	0.217	NS
Gender of first sexual partner
Female	41/285	1		1
Male	53/680	0.5 (0.3,0.7)	0.002	0.5 (0.3,0.8)	0.005
Age at sex debut, years
≤18	15/196	1		1
19–25	58/653	1.2 (0.6,2.1)	0.591	NS
≥26	21/115	2.7 (1.3,5.4)	0.006	NS
Male sex partner1
0	17/229	1		1
1	18/200	1.2 (0.6,2.5)	0.552	NS
>1	59/536	1.5 (0.9,2.7)	0.132	NS
Female sex partner1
0	85/865	1		1
1	8/53	1.6 (0.7,3.5)	0.222	NS
>1	1/47	0.2 (0.1,1.5)	0.113	NS
Had one-night stand with male partner1
No	29/364	1		1
Yes	65/601	1.4 (0.9,2.2)	0.148	NS
Group sex1
No	81/873	1		1
Yes	13/92	1.6 (0.9,3.0)	0.135	NS
Condom use with male sex partner1
No	25/217	1		1
Yes	69/748	0.8 (0.5,1.3)	0.315	NS
Condom use with female sex partner1
No	87/892	1		1
Yes	7/73	0.9 (0.4,2.2)	0.964	NS
Ever used illicit drugs
No	64/648	1		1
Yes	30/317	1.0 (0.6,1.5)	0.839	NS
Had a previous HIV test
No	51/543	1		1
Yes	43/422	1.1 (0.7,1.7)	0.679	0.5 (0.3,0.8)	0.006

¹Within 6 months

OR, odds ratio

NS, not significant

The last sentence of the first paragraph of the Results section under the subheading “Factors correlated with HIV infection of MSWs and ncMSM” should be: For ncMSM, syphilis infection (OR = 5.6; 95%CI: 3.3–9.6), receiving a lower education (Junior high school or less) (OR = 2.6; 95%CI: 1.4–4.7) and first sex with male partner (OR = 2.1; 95%CI: 1.3–3.4) were associated with HIV-positivity. Previous HIV testing (OR = 0.4; 95%CI: 0.2–0.6) and younger in age (<20) (OR = 0.6; 95%CI: 0.4–0.9) were negatively associated with HIV infection.

The last sentence of the second paragraph of the Results section under the subheading “Factors correlated with HIV infection of MSWs and ncMSM” should be: Syphilis infection (aOR = 5.9; 95%CI: 3.2–10.9), having a lower education (Junior high school or less) (aOR = 2.1; 95%CI: 1.0–4.2) and first sex with male partner (aOR = 2.1; 95% CI: 1.2–3.9) were positively associated with HIV infection in ncMSM, but having had an HIV test (aOR = 0.4; 95%CI: 0.2–0.7) was a protective factor.

The first sentence of the third paragraph of the Results section under the subheading “Factors correlated with HIV infection of MSWs and ncMSM” should be: In logistic regression analyses evaluating the risk factors for combined HIV infection (Table 4), syphilis infection, reporting ever having being diagnosed with STIs, people who are bisexual, age at sex debut (≥26) and being married were associated with HIV-positivity. After controlling for MSM type, syphilis infection and people who are bisexual were associated with an increased HIV infection.