Table 1.
Characteristics of Persons with HIV-1 Sequences and Percentage That Cluster Domestically and Internationally
| Total | Clustered domestically only | Clustered internationally | |||||
|---|---|---|---|---|---|---|---|
| Category | n | % | n | % of those clustering | n | % of those clustering | Adjusted prevalence ratioa |
| Total | 41,539 | 100 | 12,688 | 97 | 457 | 3 | — |
| Sex | |||||||
| Male | 32,400 | 78 | 10,987 | 96 | 438 | 4 | — |
| Female | 9,139 | 22 | 1,701 | 99 | 19 | 1 | — |
| Age at HIV diagnosis (year) | |||||||
| <13 | 245 | 1 | 29 | 94 | 2 | 6 | — |
| 13–19 | 2,282 | 5 | 1,154 | 99 | 16 | 1 | 1.8 (0.1–42.6) |
| 20–29 | 13,951 | 34 | 5,836 | 97 | 190 | 3 | 1.3 (0.7–2.1) |
| 30–39 | 11,507 | 28 | 3,090 | 95 | 152 | 5 | 1.3 (0.7–2.1) |
| 40–49 | 8,733 | 21 | 1,810 | 96 | 70 | 4 | 1.0 (0.6–1.8) |
| 50–59 | 3,749 | 9 | 645 | 97 | 18 | 3 | 0.9 (0.5–1.8) |
| ≥60 | 1,072 | 3 | 124 | 93 | 9 | 7 | 2.1 (0.9–4.8) |
| Race/ethnicity | |||||||
| Asian/NHOPI | 779 | 2 | 238 | 84 | 47 | 16 | 10.9 (6.8–17.6) |
| Black/African American | 19,645 | 47 | 5,460 | 99 | 37 | 1 | — |
| Hispanic/Latino | 9,307 | 22 | 2,810 | 95 | 136 | 5 | 3.7 (2.5–5.5) |
| White | 10,755 | 26 | 3,853 | 95 | 224 | 5 | 6.2 (4.3–8.9) |
| Other | 1,053 | 3 | 327 | 96 | 13 | 4 | 4.6 (2.4–8.6) |
| Transmission category | |||||||
| MSM | 25,142 | 61 | 9,596 | 96 | 400 | 4 | — |
| MSM and injection drug use | 1,621 | 4 | 487 | 98 | 12 | 2 | 0.5 (0.3–1.0) |
| Injection drug use (male) | 2,220 | 5 | 305 | 96 | 12 | 4 | 0.8 (0.4–1.6) |
| Injection drug use (female) | 1,692 | 4 | 269 | 99 | 4 | 1 | 0.5 (0.2–1.3) |
| Heterosexual contact (male) | 3,259 | 8 | 579 | 98 | 12 | 2 | 0.8 (0.5–1.5) |
| Heterosexual contact (female) | 7,306 | 18 | 1,418 | 99 | 14 | 1 | 0.5 (0.3–0.8) |
| Other | 300 | 1 | 35 | 92 | 3 | 8 | 1.7 (0.1–27.3) |
| Country of birth | |||||||
| United States | 26,524 | 64 | 8,592 | 97 | 234 | 3 | — |
| U.S. dependency | 574 | 1 | 98 | 92 | 8 | 8 | 1.6 (0.7–3.7) |
| Other (non-U.S.) | 6,170 | 15 | 1,381 | 92 | 120 | 8 | 2.0 (1.6–2.6) |
| Unknown | 8,271 | 20 | 2,617 | 96 | 95 | 4 | 1.3 (1.1–1.7) |
| Population of area of residence at HIV diagnosis | |||||||
| <50,000 | 2,357 | 6 | 680 | 99 | 8 | 1 | — |
| 50,000–499,999 | 4,019 | 10 | 1,200 | 98 | 24 | 2 | 1.4 (0.7–2.9) |
| ≥500,000 | 34,949 | 84 | 10,778 | 96 | 424 | 4 | 1.5 (0.7–3.4) |
| Year of diagnosis | |||||||
| 1999 or earlier | 2,745 | 7 | 108 | 93 | 8 | 7 | 4.4 (2.0–9.7) |
| 2000–2004 | 2,236 | 5 | 316 | 93 | 23 | 7 | 3.0 (1.9–4.7) |
| 2005–2009 | 22,768 | 55 | 7,138 | 96 | 261 | 4 | 1.4 (1.1–1.6) |
| 2010–2012 | 13,790 | 33 | 5,126 | 97 | 165 | 3 | — |
| Region of residence at HIV diagnosisb | |||||||
| Northeast | 12,509 | 30 | 3,130 | 95 | 156 | 5 | 3.4 (2.3–5.0) |
| Midwest | 8,689 | 21 | 3,941 | 98 | 65 | 2 | — |
| South | 12,344 | 30 | 3,034 | 94 | 200 | 6 | 1.6 (1.1–2.5) |
| West | 7,908 | 31 | 2,569 | 99 | 33 | 1 | 2.2 (1.5–3.3) |
a
Adjusted prevalence ratios were derived from a multivariable model that included all listed categories except sex, which is included as a stratification within transmission category. 95% confidence intervals are shown in parentheses.
b
Numbers do not sum to total due to persons residing outside the United States at time of diagnosis.
MSM, men who have sex with men; NHOPI, native Hawaiian or other Pacific islander.