Table 4.
Factors associated with transmission within clusters
| Characteristics | Number | In cluster | OR (95%CI) | P-values | AOR (95%CI) | P-values | |
|---|---|---|---|---|---|---|---|
| Age (years) |
≤ 24 25–34 35–44 ≥ 45 |
259 396 126 113 |
186 (71.2) 268 (67.7) 83 (65.9) 63 (55.8) |
1 0.822 (0.583–1.158) 0.758 (0.480–1.197) 0.495 (0.312–0.783) |
0.263 0.234 0.003 |
1 0.674 (0.455–0.997) 0.562 (0.318–0.995) 0.653 (0.314–1.536) |
0.048 0.048 0.253 |
| Household registrations |
Chongqing Other province |
689 205 |
466 (67.6) 134 (65.4) |
1 0.903 (0.650–1.255) |
0.544 | ||
| Local residence time |
≤ 2 years > 2 years |
34 860 |
21 (61.8) 579 (67.3) |
1 1.276 (0.629–2.585) |
0.499 | ||
| Ethnicity |
Han Others |
876 18 |
589 (67.2) 11 (61.1) |
1 0.766 (0.294–1.996) |
0.585 | ||
| Marital status |
Unmarried Married or living with spouse Divorced or widowed |
700 126 68 |
482 (68.9) 74 (58.7) 44 (64.7) |
1 0.644 (0.436–0.950) 0.829 (0.492–1.398) |
0.026* 0.482 |
1 0.897 (0.501–1.605) 1.004 (0.484–2.085) |
0.713 0.991 |
| Education |
Illiterate or Primary Middle school High school Junior college or above |
32 106 223 533 |
14 (43.8) 66 (62.3) 154 (69.1) 366 (68.7) |
1 2.121 (0.952–4.727) 2.870 (1.350–6.099) 2.818 (1.369–5.801) |
0.066 0.006 0.005 |
1 0.937 (0.355–2.472) 1.452 (0.567–3.720) 1.338 (0.528–3.389) |
0.895 0.437 0.539 |
| Sexual orientation |
Homosexual Bisexual Uncertain |
716 142 36 |
493 (68.9) 94 (66.2) 13 (36.1) |
1 0.886 (0.605–1.298) 0.256 (0.127–0.514) |
0.534 < 0.001 |
1 1.045 (0.659–1.656) 0.350 (0.154–0.797) |
0.851 0.012 |
| Sexual roles |
“Top” “Bottom” “Verse |
307 277 310 |
195 (63.5) 186 (67.1) 219 (70.6) |
1 1.174 (0.834–1.652) 1.382 (0.987–1.937) |
0.358 0.060 |
||
| Age of first same-sex sexual behavior |
< 18 18–24 ≥ 25 |
124 550 220 |
83 (66.9) 386 (70.2) 131 (59.5) |
1 1.163 (0.767–1.763) 0.727 (0.459–1.153) |
0.478 0.175 |
||
| Use software to find sex partners |
Yes No |
728 166 |
499 (68.5) 101 (60.8) |
1 0.713 (0.503–1.011) |
0.057 | ||
| Syphilis positive |
Yes No |
158 736 |
220 (36.8) 73 (41.5) |
1 0.547 (0.366–0.817) |
0.003 |
1 0.531 (0.336–0.839) |
0.007 |
| Hepatitis C positive |
Yes No |
3 891 |
107 (40.2) 186 (36.6) |
1 1.020 (0.092–11.300) |
0.987 | ||
| Genotype |
CRF07_BC CRF01_AE CRF08_BC CRF55_01B B Others or URF |
658 175 10 30 9 12 |
519 (78.9) 69 (39.4) 0 (0.0) 8 (26.7) 0 (0.0) 4 (33.3) |
1 0.174 (0.122–0.249) - 0.097 (0.042–0.223) - 0.134 (0.40-0.451) |
< 0.001 - < 0.001 - 0.001 |
1 0.162 (0.112–0.234) - 0.084 (0.036–0.199) - 0.148 (0.043–0.514) |
< 0.001 - < 0.001 - 0.003 |
| Drug resistance |
Yes No |
50 844 |
35 (70.0) 565 (66.9) |
1 1.152 (0.619–2.145) |
0.655 | ||