Table 1.

Characteristics of 123 HIV-negative MSM and 123 HIV-positive MSM participants at study enrollment.

Characteristic	HIV-Negative		HIV-Positive		All MSM		P
	N	%	N	%	N	%
Male sex	123	100	123	100	246	100	1.0
Thai ethnicity	123	100	123	100	246	100	1.0
Median age (IQR), years	28 (23-34)		28 (24-33)		28 (23-33)		0.9
Marital Status							0.62
Single	114	93	113	92	227	92
Live together	5	4	6	5	11	4
Partner died			2	2	2	1
No response	4	3	2	2	6	2
Education							0.9
Secondary school or below	33	27	37	30	70	28
Vocational/college level	73	59	68	55	141	57
Graduate level	12	10	14	11	26	11
No response	5	4	4	3	9	4
Occupation							0.4
Unemployed/ Home duties/ retired	9	7	13	11	22	9
Student	19	16	15	12	34	14
Employed	86	70	88	71	174	71
Other	3	2	0	0	3	1
No response	6	5	7	6	13	5
Monthly income, Thai Baht							0.08
<10,000	34	28	32	26	66	27
10-20,000	57	46	41	33	98	40
20-50,000	18	15	22	18	40	16
>50,000	1	1	5	4	6	2
No response	13	11	23	19	36	15
Sexual preference							0.54
Homosexual	108	88	111	90	219	89
Bisexual	15	12	12	10	27	11
Smoking history							0.4
Never smoked	97	79	87	71	184	75
Previously smoked	9	7	15	12	24	10
Currently smokes	15	12	20	16	35	14
No response	2	2	1	1	3	1
Self-reported STI in the last year
Syphilis	4	3	7	6	11	5	0.5
Gonorrhea	2	2	14	11	16	7	0.003
Non-specific urethritis	2	2	4	3	6	2	0.7
Herpes simplex infection	1	1	2	2	3	1	1.0
Warts	21	17	11	9	32	13	0.09
- Perianal	18	15	9	7	27	11
- Intraanal	1	1	2	2	3	1
- Genitalia	3	2	0	0	3	1
Syphilis (by VDRL, TPHA, and treatment history)							0.01
No	100	81	83	67	183	74
Yes	6	5	4	3	10	4
Not available	17	14	36	29	53	22
HAART
Naive			107	87
Experienced			16	13
Median CD4 count, cells/mm3
Current CD4 count (IQR)			343 (248-455)
Nadir CD4 count (IQR)			295 (206-417)
Median baseline plasma HIV RNA
Baseline log10 copies/mL (IQR)			4.53 (3.82- 4.94)
N (%) <40 copies/mL			12	10
N (% of those on HAART) <40 copies/mL			11	69

IQR, interquartile range; STI, sexually transmitted infection; VDRL, venereal disease research laboratory; TPHA, Treponema pallidum hemagglutination; HAART, highly active antiretroviral therapy.

Percentages may not always add up to 100% because of rounding.