Table 2.
Bivariate and multivariate correlates of positive TST results (n = 259, AIC = 41.4)
| Characteristic | Total (n = 259) n (%) |
TST-negative (n = 32, 12.4%) n (%) |
TST-positive (n = 227, 87.6%) n (%) |
Unadjusted OR (95%CI) | P value | Adjusted OR (95%CI) | P value |
|---|---|---|---|---|---|---|---|
| Age, years, mean ± SD | 33.4 ± 7.2 | 31.5 ± 6.2 | 33.7 ± 7.3 | 1.05 (0.99–1.11) | 0.120 | ||
| Sex | |||||||
| Female | 10 (3.9) | 3 (9.4) | 7 (3.1) | 0.31 (0.08–1.26) | 0.100 | 0.32 (0.07–1.41) | 0.131 |
| Male | 249 (96.1) | 29 (90.6) | 220 (96.9) | Referent | — | Referent | — |
| BMI, kg/m2 | 22.4 (3.4) | 22.3 (3.0) | 22.5 (3.4) | 1.02 (0.91–1.15) | 0.712 | . | |
| BMI ≤18.5 | 22 (8.5) | 3 (9.4) | 19 (8.4) | 0.88 | 0.849 | ||
| BMI >18.5 | 237 (91.5) | 29 (90.6) | 208 (91.6) | Referent | — | ||
| Previously incarcerated | 175 (67.6) | 15 (46.9) | 160 (70.5) | 2.71 (1.28–5.73) | 0.009 | 4.61 (1.76–12.1) | 0.002 |
| Health history | |||||||
| History of needle sharing | 144 (55.6) | 22 (68.8) | 122 (53.7) | 0.53 (0.24–1.17) | 0.114 | 0.61 (0.10–3.61) | 0.584 |
| HIV status and CD4 count, cells/μl (n = 235)* | |||||||
| HIV-infected, CD4 ≥200 | 86 (36.6) | 13 (44.8) | 73 (35.4) | 0.48 (0.20–1.16) | 0.104 | 0.37 (0.06–2.09) | 0.259 |
| HIV-infected, CD4 <200 | 23 (9.8) | 6 (20.7) | 17 (8.3) | 0.24 (0.08–0.76) | 0.015 | 0.25 (0.04–1.61) | 0.143 |
| Non-HIV-infected | 126 (53.6) | 10 (34.5) | 116 (56.3) | Referent | — | — | — |
| HIV status† | |||||||
| Non-infected | 125 (48.3) | 10 (20.8) | 115 (54.5) | 2.26 (1.02– 4.99) | 0.044 | ||
| Infected | 134 (51.7) | 22 (68.8) | 112 (49.5) | Referent | — | ||
*
Excludes HIV-infected participants who did not complete CD4 testing, but underwent TST.
†
Not included in multivariate analysis as HIV status stratified by CD4 count.
TST = tuberculin skin test; AIC = Akaike Information Criterion; OR = odds ratio; CI = confidence interval; SD = standard deviation; BMI = body mass index; HIV = human immunodeficiency virus.