Table 1.
Characteristics of recently HIV-infected MSM enrolled in the SD-PIRC (2002 - 2015).
| Wave 1 (N=167) | Wave 2 (N=50) | Wave 3 (N=68) | Total (N=285) | |||||
|---|---|---|---|---|---|---|---|---|
| n | % | n | % | n | % | n | % | |
| Median days since EDI | 91 | IQR=78, 143 | 44 | IQR=27, 85 | 70 | IQR=32, 86 | 84 | IQR=40, 103 |
| Median days since HIV diagnosis | 21 | IQR=14, 28 | 21 | IQR=15, 32 | 15 | IQR=11, 28 | 20 | IQR=14, 28 |
| Age (in years) | ||||||||
| 18-29 | 64 | 38.3 | 27 | 54.0 | 27 | 39.7 | 118 | 41.4 |
| 30-39 | 58 | 34.7 | 13 | 26.0 | 23 | 33.8 | 94 | 33.0 |
| 40-49 | 35 | 21.0 | 6 | 12.0 | 9 | 13.2 | 50 | 17.5 |
| ≥50 | 10 | 6.0 | 4 | 8.0 | 9 | 13.2 | 23 | 8.1 |
| Race/ethnicity | ||||||||
| White, non-Hispanic | 112 | 67.1 | 25 | 50.0 | 35 | 51.5 | 172 | 60.4 |
| Black, non-Hispanic | 6 | 3.6 | 3 | 6.0 | 7 | 10.3 | 16 | 5.6 |
| Hispanic | 37 | 22.2 | 17 | 34.0 | 15 | 22.1 | 69 | 24.2 |
| Other | 12 | 7.2 | 5 | 10.0 | 11 | 16.2 | 28 | 9.8 |
| Education | ||||||||
| Less than high school | 2 | 1.2 | 1 | 2.0 | 0 | 0.0 | 3 | 1.1 |
| Completed high school | 14 | 8.4 | 5 | 10.0 | 7 | 10.3 | 26 | 9.1 |
| Some College | 71 | 42.5 | 24 | 48.0 | 29 | 42.7 | 124 | 43.5 |
| Completed college or more | 80 | 47.9 | 20 | 40.0 | 32 | 47.1 | 132 | 46.3 |
| Illicit drug use (past 3 months)* | 61 | 70.1 | 22 | 45.8 | 38 | 55.9 | 121 | 59.6 |
| Marijuana | 49 | 56.3 | 22 | 45.8 | 24 | 35.3 | 95 | 46.8 |
| Methamphetamine | 38 | 43.7 | 8 | 16.7 | 13 | 19.1 | 59 | 29.1 |
| Ecstasy | 22 | 25.3 | 10 | 20.8 | 10 | 14.7 | 42 | 20.7 |
| Amyl nitrite (poppers) | 44 | 50.6 | 11 | 22.9 | 28 | 41.2 | 83 | 40.9 |
| Cocaine | 16 | 18.4 | 8 | 16.7 | 7 | 10.3 | 31 | 15.3 |
| Gamma-hydroxybutyric acid (GHB) | 24 | 27.6 | 7 | 14.6 | 9 | 13.2 | 40 | 19.7 |
| Ketamine | 9 | 10.3 | 1 | 2.1 | 1 | 1.5 | 11 | 5.4 |
| Heroin | 1 | 1.2 | 0 | 0.0 | 0 | 0.0 | 1 | 0.5 |
| Median # male sexual partners (past 3 months) | 6 | IQR=3, 14 | 6 | IQR=3, 11 | 5 | IQR=1, 10 | 6 | IQR=2, 12 |
| Recent sexual partners (past 3 months)^ | ||||||||
| ≥1 main partner~ | 49 | 33.1 | 22 | 45.8 | 27 | 40.3 | 98 | 37.3 |
| ≥1 HIV+/unknown status partner | 131 | 79.4 | 31 | 64.6 | 53 | 77.9 | 215 | 76.5 |
| CAI with ≥1 recent partner | 120 | 71.9 | 33 | 70.2 | 59 | 86.8 | 212 | 75.2 |
| Any concurrent partners | 97 | 58.1 | 18 | 36.0 | 38 | 55.9 | 153 | 53.7 |
| HIV transmission network characteristics | ||||||||
| Network clustering | 93 | 55.7 | 30 | 60.0 | 31 | 45.6 | 154 | 54.0 |
| Median network degree | 1 | IQR=0, 3 | 1 | IQR=0, 3 | 0 | IQR=0, 2 | 1 | IQR=0, 3 |
| Source of ≥1 transmission link established at any point during follow-up | 50 | 36.0 | 18 | 40.0 | 10 | 16.4 | 78 | 31.8 |
| Source of ≥1 transmission link established during recent infection | 23 | 19.5 | 5 | 13.9 | 6 | 10.0 | 34 | 15.9 |
Abbreviations: SD-PIRC=San Diego Primary Infection Resource Consortium; MSM=men who have sex with men; EDI=estimated date of infection; IQR=interquartile range; CAI=condomless anal intercourse.
*
Excluding marijuana.
^
Partner-specific data collected for most recent (past 3 months) sexual partners: Wave 1 up to 3 partners; Wave 2 up to 2 partners; Wave 3 up to 3 partners.
~
Relationship type: main (primary sex partner) vs. non-main (regular partner, friend, acquaintance, one-time partner, unknown partner, trade partner).