. 2017 Sep 7;12(9):e0183418. doi: 10.1371/journal.pone.0183418

Table 1. Demographic characteristics, awareness of HIV-related prevention knowledge, and behavioral characteristics of included subjects.

Variables	Xichang N = 2797				χ²	P	Zhaojue and Butuo N = 3983				χ²	P
	HIV-positive	%	HIV-negative	%			HIV-positive	%	HIV-negative	%
	N = 11		2786				N = 277		N = 3706
Ethnicity
Yi	8	1.79	439	98.21	26.48	<0.001	276	7.03	3648	92.97	-	0.125
Han or other	3	0.13	2347	99.87			1	1.69	58	98.31
Education level
Primary school or below	7	1.79	383	98.21	-	<0.001	272	7.23	3492	92.77	-	0.011
Secondary or high school	3	0.18	1666	99.82	12.77^a	<0.001^a	3	1.94	152	98.06	6.356^a	0.012^a
Junior college or above	1	0.14	737	99.86			2	3.13	62	96.88
Age, yrs
Mean age	30.73±6.640		26.54±4.82		-2.87	0.004	30.36±6.80		29.61±7.35		-1.65	0.07
<25	2	0.19	1039	99.81	-	0.189	55	5.11	1022	94.89	9.2	0.01
25–30	4	0.36	1120	99.64	3.36^a	0.08^a	75	6.91	1010	93.09	9.43^a	0.01^a
≥30	5	0.79	627	99.21			147	8.07	1674	91.93
Number of previous births
0	5	0.27	1818	99.73	-	0.013b	40	4.80	794	95.20	14.64	0.002
1	3	0.39	774	99.61	8.00^a	0.01^a	83	7.66	1001	92.34	1.09^a	0.30^a
2	1	0.64	156	99.36			97	8.85	999	91.15
3 or above	2	5.00	38	95.00			57	5.88	912	94.12
History of out-migrating for work
No	9	0.45	2003	99.55	-	0.738	238	6.67	3330	93.33	4.27	0.04
Yes	2	0.25	783	99.75			39	9.40	376	90.60
Husband’s history of out-migrating for work
No	8	0.41	1932	99.59	-	1	211	6.41	3083	93.59	8.87	0.003
Yes	3	0.35	854	99.65			66	9.58	623	90.42
Awareness of HIV-related prevention knowledge
No	4	0.49	806	99.51	-	0.53	70	7.83	824	92.17	1.37	0.24
Yes	7	0.35	1980	99.65			207	6.70	2882	93.30
Drug use
No	11	0.39	2782	99.61	-	1	277	6.99	3684	93.01	-	0.79
Non-injection drug use	0	0.00	2	100.00			0	0.00	14	100.00
IDU	0	0.00	2	100.00			0	0.00	8	100.00
Husband with drug use
No	9	0.32	2772	99.68	-	0.002	263	6.77	3619	93.23	7.64	0.01
Yes	2	12.50	14	87.50			14	13.86	87	86.14
Sexual history with men other than husband during marriage
No	10	0.36	2760	99.64	-	0.1	263	6.83	3586	93.17	2.62	0.11
Yes	1	3.70	26	96.30			14	10.45	120	89.55
History of STD
No	13	0.40	2773	99.60	0.05	0.82	22	6.88	2784	93.12	5.62	0.18
Yes	0	0.00	11	100.00			5	18.52	3684	81.48
History of STD of husband
No	10	0.36	2769	99.64	-	0.07	261	6.73	3618	93.27	11.73	0.001
Yes	1	5.56	17	94.44			16	15.38	88	84.62

^a: Trend chi-square test.