Table 1. Baseline characteristic by sampling phase.
| 2001–2008 | 2009–2011 | 2012–2014 | 2015–2016 | Total | |
|---|---|---|---|---|---|
| Sex | |||||
| Men | 306(85.7) | 461(92.8) | 686(93.8) | 526(96.5) | 1979(92.9) |
| Women | 51(14.3) | 36(7.2) | 45(6.2) | 19(3.5) | 151(7.1) |
| Age at diagnosis(years)a | 34(28–42) | 35(28–45) | 34(28–46) | 34(28–47) | 34(28–45) |
| CD4 counts (cells per μL)b | 323(200–433) | 329(191–441) | 358(228–519) | 304(162–450) | 333(195–471) |
| Transmission risk groupc | |||||
| Heterosexual | 119(36) | 155(32.0) | 178(24.5) | 115(21.3) | 567(27.2) |
| MSM | 168(50.8) | 304(62.7) | 534(73.5) | 414(76.5) | 1420(68.1) |
| IDU | 23(6.9) | 21(4.3) | 13(1.8) | 12(2.2) | 69(3.3) |
| Blood transfusion | 21(6.3) | 4(0.8) | 2(0.3) | 0(0) | 27(1.3) |
| Mother to child | 0(0) | 1(0.2) | 0(0) | 0(0) | 1(0.05) |
| Subtype | |||||
| A1 | 3(0.8) | 4(0.8) | 5(0.7) | 2(0.4) | 14(0.7) |
| B | 151(42.3) | 119(23.9) | 111(15.2) | 69(12.7) | 450(21.1) |
| C | 9(2.5) | 5(1) | 7(1) | 1(0.2) | 22(1) |
| F1 | 1(0.3) | 0(0) | 0(0) | 0(0) | 1(0) |
| G | 3(0.8) | 1(0.2) | 0(0) | 0(0) | 4(0.2) |
| 01_AE | 119(33.3) | 230(46.3) | 378(51.7) | 277(50.8) | 1004(47.1) |
| 02_AG | 0(0) | 0(0) | 3(0.4) | 1(0.2) | 4(0.2) |
| 06_cpx | 3(0.8) | 0(0) | 0(0) | 0(0) | 3(0.1) |
| 07_BC | 56(15.7) | 123(24.7) | 172(23.5) | 140(25.7) | 491(23.1) |
| 08_BC | 7(2.0) | 4(0.8) | 2(0.3) | 3(0.6) | 16(0.8) |
| 55_01B | 0(0) | 3(0.6) | 7(1) | 3(0.6) | 13(0.6) |
| 57_BC | 1(0.3) | 0(0) | 0(0) | 0(0) | 1(0) |
| 59_01B | 0(0) | 0(0) | 2(0.3) | 2(0.4) | 4(0.2) |
| 63_02A1 | 0(0) | 1(0.2) | 0(0) | 0(0) | 1(0) |
| 65_cpx | 1(0.3) | 1(0.2) | 4(0.5) | 6(1.1) | 12(0.6) |
| 67_01B | 0(0) | 1(0.2) | 1(0.1) | 0(0) | 2(0.1) |
| 68_01B | 0(0) | 0(0) | 2(0.3) | 2(0.4) | 4(0.2) |
| URFs | 3(0.8) | 5(1) | 37(5.1) | 39(7.2) | 84(3.9) |
| Ethnicity | |||||
| Han | 334(93.6) | 472(95.0) | 705(96.4) | 538(98.7) | 2049(96.2) |
| Minority | 23(6.4) | 25(5.0) | 26(3.6) | 7(1.3) | 81(3.8) |
Data are n (%) or median (IQR).
MSM = Men who have sex with men.
IDU = Injecting drug user
aData for n = 2,125.
bData for n = 1,858.
cData for n = 2,084.
URFs = Unique Recombinant Forms