Table 1. Baseline characteristic by sampling phase.
| 1994–2003 | 2004–2008 | 2009–2013 | 2014–2020 | Total | |
|---|---|---|---|---|---|
| Sex | |||||
| Men | 123(85.4) | 271(80.7) | 69(78.4) | 48(68.6) | 511(80.1) |
| Women | 21(14.6) | 65(19.3) | 19(21.6) | 22(31.4) | 127(19.9) |
| Age at diagnosis(years)a | 27(23–31) | 32(26–37) | 34(28–39) | 44(33–72) | 32(26–39) |
| CD4 counts(cells per μL)b | 213(119–306) | 294(206–422) | 369(286–506) | 356(299–405) | 336(240–461) |
| Ethnicity | |||||
| Han | 71(75.5) | 86(36.1) | 47(53.4) | 9(12) | 213(43) |
| Uighur | 23(24.5) | 124(52.1) | 25(28.4) | 18(24) | 190(38.4) |
| Yi | 0(0) | 22(9.2) | 16(18.2) | 13(17.3) | 51(10.3) |
| Li | 0(0) | 0(0) | 0(0) | 34(45.3) | 34(6.9) |
| Other Minority | 0(0) | 6(2.5) | 0(0) | 1(1.3) | 7(1.4) |
| Population characteristicc | |||||
| Heterosexual | 2(1) | 0(0) | 2(0.3) | 0(0) | 4(0.3) |
| MSM | 0(0) | 0(0) | 0(0) | 2(0.7) | 2(0.1) |
| PWID | 153(77.3) | 180(75.9) | 442(67.7) | 288(99.3) | 1063(77.1) |
| Former paid blood donor | 4(2) | 57(24.1) | 18(2.8) | 0(0) | 79(5.7) |
| General population | 37(18.7) | 0(0) | 191(29.2) | 0(0) | 228(16.5) |
| Volunteer blood donor | 2(1) | 0(0) | 0(0) | 0(0) | 2(0.1) |
| Region | |||||
| North | 13(6) | 40(11.5) | 18(2) | 2(0.6) | 73(4) |
| Northeast | 2(0.9) | 7(2) | 2(0.2) | 0(0) | 11(0.6) |
| East | 0(0) | 5(1.4) | 367(39.8) | 0(0) | 372(20.5) |
| Central South | 2(0.9) | 37(10.7) | 281(30.4) | 43(13.3) | 363(20) |
| Southwest | 96(44.2) | 128(36.9) | 226(24.5) | 257(79.3) | 707(39) |
| Northwest | 54(24.9) | 128(36.9) | 27(2.9) | 20(6.2) | 229(12.6) |
| Unknown | 50(23) | 2(0.6) | 2(0.2) | 2(0.6) | 56(3.1) |
| Genotype and subtype | |||||
| 1a | 2(0.9) | 2(0.6) | 38(4.1) | 22(6.8) | 64(3.5) |
| 1b | 80(36.9) | 121(34.9) | 291(31.5) | 35(10.8) | 527(29.1) |
| 2a | 18(8.3) | 18(5.2) | 85(9.2) | 0(0) | 121(6.7) |
| 3a | 43(19.8) | 62(17.9) | 104(11.3) | 64(19.8) | 273(15.1) |
| 3b | 48(22.1) | 99(28.5) | 213(23.1) | 102(31.5) | 462(25.5) |
| 6a | 8(3.7) | 10(2.9) | 91(9.9) | 26(8) | 135(7.5) |
| 6n | 11(5.1) | 18(5.2) | 50(5.4) | 40(12.3) | 119(6.6) |
| 6xa | 7(3.2) | 12(3.5) | 36(3.9) | 13(4) | 68(3.8) |
| Other | 0(0) | 5(1.4) | 15(1.6) | 22(6.8) | 42(2.3) |
Data are n (%)
North = Beijing, Hebei, Shanxi, Inner Mongolia
Northeast = Liaoning, Heilongjiang
East = Shanghai, Jiangsu, Zhejiang, Anhui, Jiangxi, Shandong
Central South = Henan, Hubei, Hunan, Guangdong,Guangxi, Hainan
Southwest = Chongqing, Sichuan, Guizhou, Yunnan
Northwest = Shannxi, Qinghai, Sinkiang
a Data for n = 429
b Data for n = 125
cData for n = 1378
dData for n = 1755
MSM = Men who have sex with men
PWID = People who inject drugs
Other = 6e, 6 g, 6 l, 6w, and 6v.