TABLE 1.
Characteristics of subjects among different HIV-1 transmission growth clustersa
| Characteristics | Growth rate of HIV-1 transmission cluster (n, %) |
P value | |||
|---|---|---|---|---|---|
| Low (n = 1,328) | Medium (n = 663) | High (n = 664) | Total (n = 2,655) | ||
| Gender | <0.001 | ||||
| Male | 1,178 (88.70) | 645 (97.29) | 662 (99.70) | 2,485 (93.60) | |
| Female | 150 (11.30) | 18 (2.71) | 2 (0.30) | 170 (6.40) | |
| Age group | <0.001 | ||||
| ≤20 | 52 (3.92) | 30 (4.52) | 48 (7.23) | 130 (4.90) | |
| 21~30 | 568 (42.77) | 309 (46.61) | 348 (52.41) | 1,225 (46.14) | |
| 31~40 | 384 (28.92) | 215 (32.43) | 186 (28.01) | 785 (29.57) | |
| 41~ | 324 (24.4) | 109 (16.44) | 82 (12.35) | 515 (19.40) | |
| Marital status | <0.001 | ||||
| Unmarried | 772 (58.13) | 412 (62.14) | 483 (72.74) | 1,667 (62.79) | |
| Married | 405 (30.80) | 174 (26.24) | 136 (20.48) | 719 (27.08) | |
| Divorced | 83 (6.25) | 40 (6.03) | 35 (5.27) | 158 (5.95) | |
| Data missing | 64 (4.82) | 37 (5.58) | 10 (1.51) | 111 (4.18) | |
| Education level | <0.001 | ||||
| Primary or below | 171 (12.88) | 38 (5.73) | 30 (4.52) | 239 (9.00) | |
| Junior or high | 685 (51.58) | 319 (48.11) | 321 (48.34) | 1,325 (49.91) | |
| College or others | 416 (31.33) | 272 (41.03) | 307 (46.23) | 995 (37.48) | |
| Data missing | 56 (4.22) | 34 (5.13) | 6 (0.90) | 96 (3.62) | |
| Occupation | <0.001 | ||||
| Unskilled work | 603 (45.41) | 332 (50.08) | 331 (49.85) | 1,266 (47.68) | |
| Skilled/Professional work | 85 (6.40) | 69 (10.41) | 65 (9.79) | 219 (8.25) | |
| Student | 53 (3.99) | 34 (5.13) | 46 (6.93) | 133 (5.01) | |
| Unemployment | 276 (20.78) | 75 (11.31) | 63 (9.49) | 414 (15.59) | |
| Not disclosed | 311 (23.42) | 153 (23.08) | 159 (23.95) | 615 (23.47) | |
| Infection routes | <0.001 | ||||
| HET | 334 (25.15) | 53 (12.97) | 41 (6.18) | 461 (17.36) | |
| PWID | 239 (18.00) | 18 (2.71) | 10 (1.51) | 267 (10.06) | |
| MSM | 755 (56.85) | 559 (84.31) | 613 (92.32) | 1927 (72.58) | |
| HIV-1 genotype | <0.001 | ||||
| Subtype B | 160 (12.05) | 4 (0.60) | 0 (0.00) | 164 (6.18) | |
| CRF01_AE | 870 (60.77) | 232 (34.99) | 0 (0.00) | 1,039 (39.13) | |
| CRF07_BC | 328 (24.70) | 116 (17.50) | 650 (98.04) | 1,094 (41.21) | |
| CRF55_01B | 33 (2.48) | 311 (46.91) | 13 (1.96) | 358 (13.48) | |
a
Cluster growth at diagnosis was categorized as high (≥75th percentile), medium (>50th to <75th percentile), and low (≤50th percentile). HET, heterosexually transmitted; MSM, men who have sex with men; PWID, people who inject drugs.