Table 5. STD prevalence and prevalence ratios for differences between classes.
| Variable | Class 1 | Class 2 | Class 3 | Class 1 compared to Class 2 | Class 1 compared to Class 3 | Class 2 compared to Class 3 |
|---|---|---|---|---|---|---|
| % | % | % | PR (95%CI) | PR (95%CI) | PR (95%CI) | |
| Self report past year STI | 26.6 | 36.7 | 26.1 | 0.72 (0.61, 0.86)* | 1.02 (0.79, 1.31) | 1.41 (1.09, 1.82) |
| Self report past year chlamydia | 18.8 | 22.5 | 16.8 | 0.84 (0.66, 1.07) | 1.12 (0.79, 1.58) | 1.33 (0.93, 1.92) |
| Self report past year gonorrhea | 7.4 | 12.5 | 8.9 | 0.59 (0.40, 0.88) | 0.84 (0.48, 1.44) | 1.41 (0.82, 2.44) |
| Self report past year trichomonas | 7.0 | 16.4 | 8.8 | 0.43 (0.29, 0.63)* | 0.79 (0.46, 1.37) | 1.85 (1.10, 3.14) |
| Self report past year herpes | 2.5 | 3.3 | 3.1 | 0.76 (0.33, 1.74) | 0.81 (0.30, 2.22) | 1.06 (0.36, 3.11) |
| Self report past year syphilis | 1.8 | 1.5 | 1.9 | 1.20 (0.38, 3.78) | 0.96 (0.27, 3.44) | 0.80 (0.18, 3.54) |
| Chlamydia diagnosis from MRAa | 18.1 | 14.1 | 14.0 | 1.28 (0.96, 1.72) | 1.29 (0.89, 1.87) | 1.00 (0.66, 1.52) |
| Gonorrhea diagnosis from MRAa | 3.8 | 6.3 | 4.8 | 0.60 (0.35, 1.02) | 0.78 (0.38, 1.59) | 1.30 (0.64, 2.65) |
a
Note: MRA=medical record abstraction.
*
Statistically significant after Benjamini-Hochberg correction for Type 1 error inflation.