Table 3. Crude and adjusted Poisson regression models for chlamydial infection of the urethra, pharynx, and rectum.
| Characteristic or behavior | URETHRA (N=28) | PHARYNX (N=31) | RECTUM (N=125) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PR | (95% CI) | aPR* | (95% CI) | PR | (95% CI) | aPR* | (95% CI) | PR | (95% CI) | aPR* | (95% CI) | |||
| Age | 0.99 | (0.95, 1.04) | 1.00 | (0.96, 1.05) | 0.98 | (0.94, 1.02) | 1.00 | (0.96, 1.04) | 0.96 | (0.93, 0.98) | 0.96 | (0.94, 0.98) | ||
| HIV infection | ||||||||||||||
| Negative | Ref | Ref | Ref | Ref | Ref | |||||||||
| Positive | 0.48 | (0.22, 1.02) | 0.51 | (0.24, 1.10) | 1.19 | (0.59, 2.39) | 0.96 | (0.49, 1.90) | 1.47 | (1.05, 2.06) | 1.46 | (1.06, 2.02) | ||
| Sexual orientation | ||||||||||||||
| Heterosexual | - | - | - | - | - | - | - | - | Ref | Ref | ||||
| Bisexual | Ref | Ref | Ref | 1.80 | (0.46, 7.05) | 0.81 | (0.20, 3.18) | |||||||
| Homosexual | 0.36 | (0.17, 0.76) | 0.58 | (0.25, 1.33) | 1.12 | (0.51, 2.46) | 0.97 | (0.48, 1.96) | 1.98 | (0.52, 7.59) | 0.73 | (0.18, 2.98) | ||
| Other/Unknown | 0.62 | (0.08, 4.49) | 1.04 | (0.16, 6.83) | - | - | - | - | 2.00 | (0.40, 9.92) | 1.11 | (0.24, 5.13) | ||
| Sexual role | ||||||||||||||
| Activo | Ref | Ref | Ref | Ref | Ref | |||||||||
| Pasivo | 0.23 | (0.08, 0.70) | 0.26 | (0.06, 1.10) | 4.16 | (0.94, 18.33) | 2.28 | (0.53, 9.76) | 3.62 | (1.83, 7.16) | 3.59 | (1.62, 7.95) | ||
| Moderno | 0.36 | (0.17, 0.79) | 0.35 | (0.15, 0.82) | 2.90 | (0.67, 12.47) | 1.92 | (0.48, 7.67) | 2.70 | (1.38, 5.28) | 2.63 | (1.23, 5.60) | ||
| Other/unknown | - | - | - | - | 6.21 | (0.60, 63.73) | 20.12 | (2.21, 183.59) | 2.76 | (0.67, 11.37) | 2.39 | (0.67, 8.55) | ||
| Sexual behavior in the last three encounters | ||||||||||||||
| No IOI | Ref | Ref | No ROI | Ref | Ref | No cRAI | Ref | Ref | ||||||
| IOI | 3.23 | (0.99, 10.61) | 2.12 | (0.56, 8.09) | ROI | 1.18 | (0.46, 3.03) | 0.81 | (0.31, 2.12) | cRAI | 1.49 | (1.08, 2.07) | 1.18 | (0.86, 1.63) |
| No cIAI | Ref | Ref | ||||||||||||
| cIAI | 1.47 | (0.71, 3.05) | 0.81 | (0.38, 1.71) | ||||||||||
| Other sites of infection | ||||||||||||||
| Urethral | - | - | - | - | - | - | - | - | 2.36 | (1.39, 3.98) | 3.53 | (2.10, 5.93) | ||
| Pharyngeal | - | - | - | - | - | - | - | - | 4.37 | (3.14, 6.09) | 3.91 | (2.77, 5.52) | ||
| Rectal | 2.94 | (1.39, 6.23) | 4.43 | (2.07, 9.50) | 8.39 | (4.17, 16.84) | 8.32 | (3.88, 17.85) | - | - | - | - | ||
Bold text = p-value <0.05.
*
Adjusted for: age, HIV infection, sexual orientation, sexual role, sexual behavior in the last three encounters, and other sites of infection.
cIAI, condomless insertive anal intercourse; cRAI, condomless receptive anal intercourse; IOI, insertive oral intercourse; ROI, receptive oral intercourse