Table 2. Comparison of characteristics of HIV-negative and HIV-positive partners at baseline and follow up relative to whether the HIV-positive partner (index case) was on ART or naïve to ART among study of HIV discordant couples in rural Yunnan, China, 2009–2011.
| Characteristics | At Baseline* | At Follow-Up* | ||||||||
| Overall N (%) | Index Case On ART N (%) | Index Case ART-NaïveN (%) | χ2-value | P-value | Overall N (%) | Index Case On ART N (%) | Index Case ART-NaïveN (%) | χ2-value | P-value | |
| HIV-negative partners | ||||||||||
| Frequency of sex in past 12 months (times/month) | ||||||||||
| No sex | 73 (9.1) | 39 (10.1) | 34 (8.1) | 1.037 | 0.5953 | 119 (14.6) | 51 (10.8) | 68 (19.9) | 13.117 | 0.0014 |
| 1–3 | 314 (39.3) | 147 (38.1) | 167 (40.0) | 306 (37.6) | 183 (38.9) | 123 (36.0) | ||||
| 4–30 | 417 (51.6) | 200 (51.8) | 217 (51.9) | 388 (47.7) | 237 (50.3) | 151 (44.1) | ||||
| Consistent condom use in past 12 months | ||||||||||
| No sex | 73 (9.1) | 39 (10.1) | 34 (8.1) | 35.616 | <0.0001 | 119 (14.6) | 51 (10.8) | 68 (19.9) | 20.085 | <0.0001 |
| No | 182 (22.2) | 52 (13.5) | 130 (31.1) | 135 (16.6) | 68 (14.4) | 67 (19.6) | ||||
| Yes | 549 (68.3) | 295 (76.4) | 254 (60.8) | 559 (68.8) | 352 (74.7) | 207 (60.5) | ||||
| HIV-positive partners (Index Cases) | ||||||||||
| CD4+ T cell count (cells/µl) | ||||||||||
| <200 | 108 (15.3) | 54 (15.6) | 54 (15.0) | 17.935 | 0.0005 | 70 (11.6) | 43 (11.2) | 27 (12.4) | 1.397 | 0.7062 |
| 200–349 | 187 (26.4) | 111 (32.0) | 76 (21.0) | 126 (20.9) | 86 (22.3) | 40 (18.3) | ||||
| 350–499 | 170 (24.0) | 87 (25.1) | 83 (23.0) | 119 (19.7) | 75 (19.5) | 44 (20.2) | ||||
| ≥500 | 243 (34.3) | 95 (27.3) | 148 (41.0) | 288 (47.8) | 181 (47.0) | 107 (49.1) | ||||
| Median (IQR) | 399 (244–568) | 361 (252–515) | 431 (276–631) | 473 (303–674) | 464 (303–675) | 489 (316–658) | ||||
| Plasma HIV viral load (copies/ml) | ||||||||||
| <400 | 379 (51.9) | 307 (85.0) | 72 (19.5) | 313.979 | <0.0001 | 375 (62.8) | 318 (82.6) | 57 (26.9) | 186.028 | <0.0001 |
| 400–9,999 | 220 (30.1) | 35 (9.7) | 185 (50.1) | 132 (22.1) | 42 (10.9) | 90 (42.4) | ||||
| 10,000–49,999 | 30 (4.1) | 4 (1.1) | 26 (7.1) | 21 (3.5) | 2 (0.5) | 19 (9.0) | ||||
| ≥50,000 | 101 (13.8) | 15 (4.2) | 86 (23.3) | 69 (11.6) | 23 (6.0) | 46 (21.7) | ||||
| Overall | 813 (100) | 389 (47.8) | 424 (52.2) | - | - | 813 (100) | 471 (57.9) | 342 (42.1) | - | - |
IQR: Inter-quartile range.
*
A total of 82 HIV-positive partners (index cases) began ART during the follow-up period. At baseline, these individuals were included in the “Naïve to ART” category and at follow-up, they were included in the “On ART” category.