Table 1.
Baseline Characteristicsa of the DC Cohort Participants by Incident STIs (n = 6762)
| Total | Chlamydia | Gonorrhea | Syphilis | Any STI | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| No. | Column % | No. | Row % | Column % | No. | Row % | Column % | No. | Row % | Column % | No. | Row % | Column % | |
| 6762 | 250 | 3.7 | 212 | 3.1 | 123 | 1.8 | 451 | 6.7 | ||||||
| Age at enrollment, y | ||||||||||||||
| 0–17 | 149 | 2.2 | 10 | 6.7 | 4.0 | 7 | 4.7 | 3.3 | 1 | 0.7 | 0.8 | 11 | 7.4 | 2.4 |
| 18–34 | 1377 | 20.4 | 137 | 9.9 | 54.8 | 114 | 8.3 | 53.8 | 45 | 3.3 | 36.6 | 220 | 16.0 | 48.8 |
| 35–54 | 3637 | 53.8 | 95 | 2.6 | 38.0 | 80 | 2.2 | 37.7 | 69 | 1.9 | 56.1 | 196 | 5.4 | 43.5 |
| 55+ | 1599 | 23.6 | 8 | 0.5 | 3.2 | 11 | 0.7 | 5.2 | 8 | 0.5 | 6.5 | 24 | 1.5 | 5.3 |
| Age at consent, median (IQR) | 47.0 (36.5–54.5) | 32.8 (25.6–42.3) | 32.1 (26.0–42.9) | 38.9 (31.6–47.4) | 34.8 (26.9–44.3) | |||||||||
| Gender at consent | ||||||||||||||
| Male | 4823 | 71.3 | 210 | 4.4 | 84.0 | 187 | 3.9 | 88.2 | 116 | 2.4 | 94.3 | 392 | 8.1 | 86.9 |
| Female | 1821 | 26.9 | 29 | 1.6 | 11.6 | 15 | 0.8 | 7.1 | 3 | 0.2 | 2.4 | 39 | 2.1 | 8.6 |
| Transgender female | 113 | 1.7 | 11 | 9.7 | 4.4 | 10 | 8.8 | 4.7 | 4 | 3.5 | 3.3 | 20 | 17.7 | 4.4 |
| Transgender male | 5 | 0.1 | 0 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0 | 0.0 | 0.0 |
| Race/ethnicityb | ||||||||||||||
| Non-Hispanic black | 5161 | 76.3 | 169 | 3.3 | 67.6 | 132 | 2.6 | 62.3 | 75 | 1.5 | 61.0 | 290 | 5.6 | 64.3 |
| Non-Hispanic white | 940 | 13.9 | 54 | 5.7 | 21.6 | 52 | 5.5 | 24.5 | 28 | 3.0 | 22.8 | 101 | 10.7 | 22.4 |
| Hispanic | 314 | 4.6 | 21 | 6.7 | 8.4 | 23 | 7.3 | 10.8 | 11 | 3.5 | 8.9 | 43 | 13.7 | 9.5 |
| Other | 137 | 2.0 | 3 | 2.2 | 1.2 | 4 | 2.9 | 1.9 | 1 | 0.7 | 0.8 | 6 | 4.4 | 1.3 |
| Unknown | 210 | 3.1 | 3 | 1.4 | 1.2 | 1 | 0.5 | 0.5 | 8 | 3.8 | 6.5 | 11 | 5.2 | 2.4 |
| HIV risk behaviorc | ||||||||||||||
| MSM | 2652 | 39.2 | 196 | 7.4 | 78.4 | 181 | 6.8 | 85.4 | 109 | 4.1 | 88.6 | 365 | 13.8 | 80.9 |
| HRH | 1989 | 29.4 | 23 | 1.2 | 9.2 | 11 | 0.6 | 5.2 | 4 | 0.2 | 3.3 | 35 | 1.8 | 7.8 |
| IDU | 452 | 6.7 | 1 | 0.2 | 0.4 | 1 | 0.2 | 0.5 | 0 | 0.0 | 0.0 | 2 | 0.4 | 0.4 |
| Other | 354 | 5.2 | 11 | 3.1 | 4.4 | 8 | 2.3 | 3.8 | 0 | 0.0 | 0.0 | 14 | 4.0 | 3.1 |
| Unknown | 1315 | 19.4 | 19 | 1.4 | 7.6 | 11 | 0.8 | 5.2 | 10 | 0.8 | 8.1 | 35 | 2.7 | 7.8 |
| Nadir CD4 cell count, cells/mm3d | ||||||||||||||
| <50 | 1056 | 15.6 | 17 | 1.6 | 6.8 | 17 | 1.6 | 8.0 | 9 | 0.9 | 7.3 | 37 | 3.5 | 8.2 |
| 50–199 | 1452 | 21.5 | 38 | 2.6 | 15.2 | 35 | 2.4 | 16.5 | 30 | 2.1 | 24.4 | 81 | 5.6 | 18.0 |
| 200–349 | 1703 | 25.2 | 74 | 4.3 | 29.6 | 72 | 4.2 | 34.0 | 34 | 2.0 | 27.6 | 137 | 8.0 | 30.4 |
| 350–499 | 1265 | 18.7 | 63 | 5.0 | 25.2 | 46 | 3.6 | 21.7 | 32 | 2.5 | 26.0 | 107 | 8.5 | 23.7 |
| 500+ | 1279 | 18.9 | 58 | 4.5 | 23.2 | 42 | 3.3 | 19.8 | 17 | 1.3 | 13.8 | 88 | 6.9 | 19.5 |
| Housing at index datee | ||||||||||||||
| Permanent/stable | 4486 | 66.3 | 152 | 3.4 | 60.8 | 124 | 2.8 | 58.5 | 86 | 1.9 | 69.9 | 281 | 6.3 | 62.3 |
| Temporary/unstable/homeless | 530 | 7.8 | 29 | 5.5 | 11.6 | 31 | 5.8 | 14.6 | 17 | 3.2 | 13.8 | 59 | 11.1 | 13.1 |
| Other | 15 | 0.2 | 0 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0 | 0.0 | 0.0 |
| Unknown | 1731 | 25.6 | 69 | 4.0 | 27.6 | 57 | 3.3 | 26.9 | 20 | 1.2 | 16.3 | 111 | 6.4 | 24.6 |
| Primary insurance at consentf | ||||||||||||||
| Public | 4313 | 63.8 | 137 | 3.2 | 54.8 | 119 | 2.8 | 56.1 | 56 | 1.3 | 45.5 | 239 | 5.5 | 53.0 |
| Private | 1819 | 26.9 | 72 | 4.0 | 28.8 | 60 | 3.3 | 28.3 | 54 | 3.0 | 43.9 | 143 | 7.9 | 31.7 |
| Other | 427 | 6.3 | 19 | 4.4 | 7.6 | 11 | 2.6 | 5.2 | 9 | 2.1 | 7.3 | 34 | 8.0 | 7.5 |
| Unknown | 203 | 3.0 | 22 | 10.8 | 8.8 | 22 | 10.8 | 10.4 | 4 | 2.0 | 3.3 | 35 | 17.2 | 7.8 |
| Alcohol use at consent | ||||||||||||||
| Yes | 906 | 13.4 | 49 | 5.4 | 19.6 | 42 | 4.6 | 19.8 | 23 | 2.5 | 18.7 | 89 | 9.8 | 19.7 |
| No | 4149 | 61.4 | 104 | 2.5 | 41.6 | 83 | 2.0 | 39.2 | 45 | 1.1 | 36.6 | 193 | 4.7 | 42.8 |
| Unknown | 1707 | 25.2 | 97 | 5.7 | 38.8 | 87 | 5.1 | 41.0 | 55 | 3.2 | 44.7 | 169 | 9.9 | 37.5 |
| Substance abuse at consent | ||||||||||||||
| Yes | 822 | 12.2 | 54 | 6.6 | 21.6 | 49 | 6.0 | 23.1 | 24 | 2.9 | 19.5 | 87 | 10.6 | 19.3 |
| No | 3787 | 56.0 | 97 | 2.6 | 38.8 | 73 | 1.9 | 34.4 | 52 | 1.4 | 42.3 | 178 | 4.7 | 39.5 |
| Unknown | 2153 | 31.8 | 99 | 4.6 | 39.6 | 90 | 4.2 | 42.5 | 47 | 2.2 | 38.2 | 186 | 8.6 | 41.2 |
| Diagnoses of mental health conditions at consentg | 341 | 5.0 | 3 | 0.9 | 1.2 | 2 | 0.6 | 0.9 | 0 | 0.0 | 0.0 | 4 | 1.2 | 0.9 |
| Ever HBV infection prior to consent | 379 | 5.6 | 13 | 3.4 | 5.2 | 8 | 2.1 | 3.8 | 10 | 2.6 | 8.1 | 27 | 7.1 | 6.0 |
| Ever HCV infection prior to consent | 780 | 11.5 | 14 | 1.8 | 5.6 | 12 | 1.5 | 5.7 | 7 | 0.9 | 5.7 | 28 | 3.6 | 6.2 |
Abbreviations: HBV, hepatitis B virus; HCV, hepatitis C virus; HRH, heterosexual; IDU, injection drug user; IQR, interquartile range; MSM, men who have sex with men; STI, sexually transmitted infection.
aAll characteristics are at the time of consent into the DC Cohort.
bOther race/ethnicity includes persons of Asian/Pacific Island descent and those with more than 1 reported race.
cHIV risk behaviors: HRH, IDU, MSM. MSM who are also IDUs are grouped with MSM. Other HIV transmission risk behavior includes persons who were perinatally infected or infected through blood transfusions, coagulation disorders, or occupational exposures.
dNadir CD4 is the lowest CD4 record available dated prior to enrollment into the DC Cohort. Seven participants had an unknown nadir CD4 cell count.
eTemporary/unstable housing was defined as a housing unit in which persons who are without housing or a fixed address receive temporary housing or shelter.
fPublic insurance includes Medicare, Medicaid, and other public insurance coverage plans; “Other” insurance includes self-pay, recently terminated plans, clinical trial.
gMental health conditions diagnosed previously or at the time of consent include major depressive disorder, anxiety disorder, bipolar disorder, psychoses, other.