Table 1. Demographic and clinical information for the 125 HIV-1 subtype B infected MSM patients.
| Overall(n = 125) | Cluster 1(n = 45) | Cluster 2(n = 9) | Cluster 3(n = 8) | Others(n = 63) | |
| Age [median (IQR)], yrs | 34 (28–41) | 35 (30–43) | 35 (31–39) | 34 (27–38) | 33 (29–41) |
| Ethnic group | |||||
| Chinese | 110 | 44 | 9 | 7 | 50 |
| Caucasian | 15 | 1 | 0 | 1 | 13 |
| Median viral load (copies/mL) | 28,000(11,000–120,000) | 39,000(19,000–120,000) | 19,000(9,100–120,000) | 23,500(8,250–74,750) | 24,000(7,800–115,000) |
| Median CD4 cell count (cells/mm3) | 434 (315–561) | 468 (350–581) | 399 (359–444) | 481 (442–664) | 383 (300–511) |
| CDC Category | |||||
| A1-A3 | 107 | 38 | 9 | 8 | 52 |
| B1-B3 | 18 | 7 | 0 | 0 | 11 |
| Range of sampling date | Mar 2005–Apr 2009 | Jun 2005–Apr 2009 | Jun 2005–Sept 2008 | Sept 2006–Jul 2008 | Mar 2005–Apr 2009 |