Table 1.

Socio-demographic characteristics and HIV and STI prevalence of miners by client status (numbers are percentages)

Variables	Miners		P-value
	Clients (n=339)	Not Clients (n=1457)
Socio-demographic
Mean age (SD) (yrs.) *	27.5(6.7)	28.7(7.6)	0.0023
Han Ethnic Group	36.0	44.1	0.0063
Married	56.6	64.5	0.0068
Schooling > 6 yrs.	38.1	34.1	0.1701
Living with regular partners	36.3	39.3	0.3001
Residing locally ≤ 2 yr.	52.1	64.0	<0.0001
Born locally	7.7	7.0	0.6663
Income >800 Yuan/month	50.2	45.4	0.1171
Travel time to the township center≤15 min.	71.4	64.5	0.0153
Resident Permit (hukou)
Gejiu	8.0	7.1	0.5667
Yunnan but non Gejiu	88.5	83.8	0.0285
Other province	3.5	9.1	0.0007
Drinks alcohol	77.3	65.8	<0.0001
Smokes	91.2	87.0	0.0367
HIV and STI prevalence
HIV infection&	1.8	0.5	0.0127
Syphilis &	2.4	1.6	0.3371
HSV-2&	14.9	8.4	0.0003
N. gonorthoea #	2.1	0.5	0.0029
C. trachomatis #	6.9	4.3	0.0496
Total STIs infection	23.2	12.9	<0.0001

^*mean age and (standard deviation of age) in years.

^&Thirty six subjects did not provide blood specimen for HIV, Syphilis and HSV-2

^#23 subjects did not provide urine specimens for N. gonorrhoea and C. trachomatis