Table 2.
Mean duration between HIV infection and diagnosis
| Baseline characteristics | Duration between HIV infection and diagnosis (years), mean (95% CI) | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Overall (n = 5867) | 2008 (n = 1217) | 2009 (n = 1074) | 2010 (n = 796) | 2011 (n = 809) | 2012 (n = 646) | 2013 (n = 521) | 2014 (n = 443) | 2015 (n = 361) | |
| Overall | 6.3 (6.2, 6.5) | 6.7 (6.4, 7.0) | 6.5 (6.2, 6.8) | 6.6 (6.2, 7.0) | 6.2 (5.9, 6.5) | 6.4 (6.0, 6.7) | 5.6 (5.2, 6.0) | 5.8 (5.4, 6.3) | 6.1 (5.5, 6.6) |
| Gender | |||||||||
| Male | 6.4 (6.2, 6.5) | 6.8 (6.4, 7.2) | 6.4 (6.0, 6.8) | 6.8 (6.3, 7.2) | 6.2 (5.8, 6.6) | 6.4 (5.9, 6.8) | 5.6 (5.1, 6.1) | 5.8 (5.3, 6.4) | 6.0 (5.3, 6.7) |
| Female | 6.3 (6.1, 6.5) | 6.5 (6.0, 7.0) | 6.7 (6.2, 7.2) | 6.3 (5.7, 6.9) | 6.3 (5.7, 6.8) | 6.3 (5.7, 7.0) | 5.7 (4.9, 6.4) | 5.8 (5.0, 6.6) | 6.1 (5.3, 6.9) |
| Age | |||||||||
| ≤25 years | 5.9 (5.6, 6.3) | 6.1 (5.5, 6.8) | 5.9 (5.1, 6.7) | 6.3 (5.3, 7.3) | 5.5 (4.5, 6.6) | 6.0 (4.9, 7.1) | 4.4 (3.3, 5.5) | 5.8 (4.7, 7.0) | 7.1 (5.5, 8.8) |
| 26–35 years | 6.3 (6.1, 6.5) | 6.6 (6.2, 7.1) | 6.3 (5.8, 6.8) | 6.0 (5.4, 6.6) | 6.2 (5.6, 6.8) | 6.7 (6.0, 7.3) | 5.3 (4.6, 6.0) | 4.8 (4.0, 5.6) | 4.7 (3.9, 5.5) |
| 35–45 years | 6.7 (6.5, 6.9) | 7.0 (6.4, 7.6) | 6.8 (6.3, 7.4) | 7.1 (6.4, 7.7) | 6.3 (5.7, 6.9) | 5.9 (5.2, 6.7) | 6.1 (5.4, 6.9) | 6.1 (5.2, 7.0) | 6.7 (5.7, 7.7) |
| >45 years | 6.8 (6.5, 7.1) | 7.2 (6.4, 8.0) | 7.2 (6.5, 8.0) | 7.3 (6.5, 8.1) | 6.5 (5.8, 7.2) | 6.6 (5.9, 7.3) | 6.3 (5.4, 7.2) | 6.5 (5.7, 7.4) | 6.6 (5.7, 7.6) |
| Ethnicity | |||||||||
| Han | 6.8 (6.6, 7.0) | 7.0 (6.6, 7.5) | 7.2 (6.7, 7.7) | 6.9 (6.4, 7.4) | 6.6 (6.0, 7.2) | 6.9 (6.3, 7.5) | 5.9 (5.2, 6.6) | 6.2 (5.5, 6.9) | 6.5 (5.8, 7.3) |
| Dai | 6.0 (5.8, 6.3) | 6.9 (6.4, 7.5) | 6.0 (5.5, 6.5) | 6.2 (5.6, 6.9) | 6.1 (5.5, 6.7) | 5.7 (5.0, 6.3) | 5.3 (4.6, 6.0) | 5.4 (4.6, 6.2) | 5.3 (4.2, 6.3) |
| Jingpo | 6.0 (5.8, 6.3) | 5.9 (5.4, 6.5) | 6.3 (5.7, 7.0) | 6.4 (5.6, 7.3) | 5.6 (4.9, 6.3) | 6.9 (6.0, 7.8) | 5.7 (4.9, 6.5) | 5.1 (4.1, 6.2) | 5.8 (4.7, 6.9) |
| Other | 6.0 (5.5, 6.5) | 6.1 (4.8, 7.3) | 5.8 (4.1, 7.4) | 6.7 (5.2, 8.2) | 6.3 (5.0, 7.5) | 4.8 (3.4, 6.2) | 4.9 (2.6, 7.2) | 7.2 (5.4, 9.1) | 6.1 (4.0, 8.2) |
| Marital status* | |||||||||
| Married | 6.3 (6.2, 6.5) | 6.9 (6.5, 7.3) | 6.7 (6.3, 7.1) | 6.4 (5.9, 6.8) | 5.9 (5.5, 6.3) | 6.4 (5.9, 6.9) | 5.4 (4.9, 5.9) | 5.6 (5.0, 6.2) | 6.0 (5.3, 6.8) |
| Divorced/windowed | 6.5 (6.3, 6.8) | 6.6 (5.9, 7.2) | 6.2 (5.6, 6.9) | 7.0 (6.2, 7.9) | 6.7 (5.9, 7.4) | 6.3 (5.5, 7.1) | 6.9 (5.9, 7.8) | 6.5 (5.5, 7.5) | 6.0 (5.1, 6.9) |
| Unmarried | 6.2 (5.9, 6.5) | 6.3 (5.7, 6.9) | 6.3 (5.6, 7.1) | 6.8 (6.0, 7.5) | 6.7 (5.8, 7.5) | 6.4 (5.6, 7.2) | 4.9 (4.1, 5.8) | 5.6 (4.7, 6.5) | 6.2 (5.1, 7.2) |
| Transmission route | |||||||||
| Sexual contact | 6.8 (6.6, 6.9) | 7.4 (7.1, 7.7) | 7.0 (6.7, 7.4) | 7.0 (6.6, 7.4) | 6.4 (6.1, 6.8) | 6.7 (6.3, 7.1) | 6.0 (5.5, 6.5) | 6.2 (5.7, 6.7) | 6.3 (5.7, 6.8) |
| Injecting drug use | 4.6 (4.3, 4.8) | 4.7 (4.2, 5.1) | 4.4 (3.9, 5.0) | 4.7 (4.0, 5.4) | 4.9 (4.3, 5.6) | 4.7 (4.1, 5.4) | 3.9 (3.2, 4.6) | 4.2 (3.4, 5.0) | 4.8 (3.7, 5.9) |
| Diagnosis setting | |||||||||
| Hospital | 8.6 (8.3, 8.9) | 9.4 (8.8, 10.0) | 9.8 (9.1, 10.5) | 8.8 (7.9, 9.7) | 8.7 (7.8, 9.7) | 7.8 (6.9, 8.7) | 6.9 (6.0, 7.8) | 7.7 (6.7, 8.6) | 7.8 (6.8, 8.7) |
| VCT | 7.2 (7.0, 7.5) | 7.6 (6.8, 8.3) | 7.3 (6.7, 7.9) | 8.2 (7.6, 8.8) | 7.6 (7.0, 8.3) | 7.3 (6.6, 8.0) | 6.2 (5.5, 7.0) | 6.2 (5.4, 7.1) | 6.0 (5.0, 6.9) |
| Detoxification† | 4.3 (4.0, 4.5) | 4.6 (4.0, 5.1) | 4.2 (3.5, 4.9) | 4.7 (3.9, 5.4) | 4.4 (3.7, 5.1) | 4.1 (3.4, 4.8) | 3.6 (2.7, 4.4) | 4.2 (3.4, 5.1) | 3.4 (2.0, 4.7) |
| Premarital checkup | 5.4 (5.0, 5.8) | 5.4 (4.6, 6.3) | 5.9 (4.9, 6.9) | 4.7 (3.6, 5.8) | 5.1 (4.1, 6.2) | 6.5 (4.4, 8.5) | 6.1 (4.7, 7.5) | 5.7 (3.9, 7.5) | 3.0 (1.4, 4.6) |
| Partner testing | 5.1 (4.6, 5.5) | 5.3 (4.6, 5.9) | 5.3 (4.3, 6.4) | 3.8 (2.0, 5.5) | 5.6 (4.1, 7.0) | 5.1 (3.5, 6.8) | 4.5 (2.8, 6.2) | 3.5 (2.2, 4.8) | 5.7 (4.1, 7.3) |
| Other | 5.2 (5.0, 5.5) | 5.7 (5.2, 6.2) | 5.4 (4.9, 5.9) | 5.1 (4.5, 5.7) | 4.9 (4.3, 5.4) | 5.3 (4.7, 6.0) | 4.6 (3.8, 5.4) | 4.0 (3.2, 4.8) | 5.5 (4.6, 6.4) |
*For the marital status variable, those who were cohabitating were categorized as married; †The detoxification category of the diagnosis setting variable includes detoxification centers and reeducation through labor camps but does not include methadone maintenance treatment clinics. CI: Confidence interval; VCT: Voluntary counseling and testing; HIV: Human immunodeficiency virus.