Table 1.
Baseline characteristic by sampling phase.
| 1994–2005 | 2006–2008 | 2009–2011 | 2012–2014 | 2015–2017 | 2018–2020 | Total | P value | |
|---|---|---|---|---|---|---|---|---|
| Sex | ||||||||
| Men | 169(70.71) | 1162(86.07) | 4162(95.68) | 4714(96.5) | 3651(95.48) | 3293(92.5) | 17,151(94.19) | < 0.05 |
| Women | 70(29.29) | 188(13.93) | 188(4.32) | 171(3.5) | 173(4.52) | 267(7.5) | 1057(5.81) | |
| Age (years)a | 32(26–38) | 31(25–38) | 31(26–39) | 31(26–40) | 31(26–44) | 33(27–45) | 32(26–42) | NS |
| Ethnicity | ||||||||
| Han | 173(77.58) | 756(76.06) | 1790(91.42) | 2505(93.54) | 3648(95.57) | 3442(96.69) | 12,314(93.08) | < 0.05 |
| Uyghur | 40(17.94) | 139(13.98) | 54(2.76) | 29(1.08) | 27(0.71) | 6(0.17) | 295(2.23) | |
| Yi | 2(0.9) | 35(3.52) | 38(1.94) | 34(1.27) | 20(0.52) | 12(0.34) | 141(1.07) | |
| Other | 8(3.59) | 64(6.44) | 76(3.88) | 110(4.11) | 122(3.2) | 100(2.81) | 480(3.63) | |
| CD4 count(cells per µl)b | 299(181–402) | 330(209–460) | 345(202–455) | 365(235–510) | 326(204–462) | 323(200–470) | 338(208–475) | NS |
| Transmission risk groups | ||||||||
| Heterosexual | 149(29.22) | 616(31.4) | 1045(19.27) | 911(17.34) | 837(21.96) | 1227(34.51) | 4785(23.32) | < 0.05 |
| MSM | 50(9.8) | 742(37.82) | 3581(66.03) | 4120(78.42) | 2867(75.23) | 2295(64.54) | 13,655(66.56) | |
| Injecting drug user | 111(21.76) | 418(21.3) | 712(13.13) | 203(3.86) | 107(2.81) | 34(0.96) | 1585(7.73) | |
| Blood transfusion | 190(37.25) | 176(8.97) | 79(1.46) | 16(0.3) | 0(0) | 0(0) | 461(2.25) | |
| Mother to Child | 10(1.96) | 10(0.51) | 6(0.11) | 4(0.08) | 0(0) | 0(0) | 30(0.15) | |
| Region | y199405 | y200608 | y200911 | y201214 | y201517 | y201820 | < 0.05 | |
| North | 104(19.85) | 554(27.62) | 1250(22.97) | 1721(32.73) | 1942(50.78) | 1719(48.41) | 7290(35.38) | |
| North-east | 78(14.89) | 104(5.18) | 513(9.43) | 393(7.47) | 525(13.73) | 561(15.8) | 2174(10.55) | |
| East | 79(15.08) | 295(14.71) | 1155(21.22) | 1386(26.36) | 461(12.06) | 437(12.31) | 3813(18.51) | |
| Central-south | 148(28.24) | 707(35.24) | 1196(21.98) | 1086(20.65) | 464(12.13) | 438(12.33) | 4039(19.6) | |
| South-west | 71(13.55) | 162(8.08) | 1180(21.68) | 517(9.83) | 234(6.12) | 216(6.08) | 2380(11.55) | |
| North-west | 44(8.4) | 184(9.17) | 148(2.72) | 155(2.95) | 198(5.18) | 180(5.07) | 909(4.41) | |
| Subtype | ||||||||
| B | 250(47.71) | 602(29.86) | 843(15.39) | 570(10.84) | 377(9.86) | 235(6.6) | 2877(13.92) | < 0.05 |
| C | 22(4.2) | 31(1.54) | 105(1.92) | 55(1.05) | 27(0.71) | 19(0.53) | 259(1.25) | |
| 01_AE | 103(19.66) | 679(33.68) | 2423(44.23) | 2586(49.16) | 1797(46.98) | 1568(44.04) | 9156(44.31) | |
| 07_BC | 89(16.98) | 486(24.11) | 1639(29.92) | 1424(27.07) | 1108(28.97) | 1096(30.79) | 5842(28.27) | |
| 08_BC | 26(4.96) | 103(5.11) | 70(1.28) | 93(1.77) | 33(0.86) | 32(0.9) | 357(1.73) | |
| 55_01B | 1(0.19) | 28(1.39) | 108(1.97) | 149(2.83) | 66(1.73) | 99(2.78) | 451(2.18) | |
| Minor | 14(2.67) | 38(1.88) | 115(2.1) | 94(1.79) | 101(2.64) | 137(3.85) | 499(2.41) | |
| URF | 19(3.63) | 49(2.43) | 175(3.19) | 289(5.49) | 316(8.26) | 374(10.51) | 1222(5.91) | |
Data are n (%), or median (IQR).
MSM, men who have sex with men; URF, unique recombinant form.
North, Beijing, Tianjin, Hebei, Shanxi, and Inner Mongolia. North-east, Liaoning, Jilin, and Heilongjiang. East, Shanghai, Jiangsu, Zhejiang, Anhui, Fujian, Jiangxi, and Shandong. Central- south, Henan, Hubei, Hunan, Guangdong, Guangxi, and Hainan. South-west, Chongqing, Sichuan, Guizhou, Yunnan, and Tibet. North-west, Shann'xi, Gansu, Qinghai, Ningxia, and Sinkiang.
Minor, A1, D, F1, G, H, CRF02_AG, CRF03_AB, CRF06_cpx, CRF15_01B, CRF18_cpx, CRF24_BG, CRF33_01B, CRF55_01B, CRF57_BC, CRF58_01B, CRF59_01B, CRF61_BC, CRF62_BC, CRF63_02A1, CRF64_BC, CRF65_cpx, CRF67_01B, CRF68_01B, CRF78_cpx, CRF79_0107, CRF82_cpx, CRF83_cpx, CRF85_BC, CRF86_BC, CRF87_cpx, CRF88_BC, and CRF96_cpx.
a13,216.
b10,439.