Table 2.
Hazard Ratios for Risk of Self-Reported Abnormal Pap Test, by Initial Polybrominated Biphenyl Exposure (n=956)
| Serum concentrations | n (%) | Crude HR | 95% CI | Adjusted HRa | 95% CI |
|---|---|---|---|---|---|
| Model 1: Median PBB=3 μg/L | |||||
| <1 (not detectable) | 189 (19.8) | 1.00 | – | 1.00 | – |
| 1–<3 | 355 (37.1) | 1.01 | 0.69-1.48 | 1.14 | 0.77-1.68 |
| ≥3 | 412 (43.1) | 1.02 | 0.71-1.48 | 1.14 | 0.78-1.67 |
| Model 2: 90th percentile PBB=13 μg/L | |||||
| <1 (not detectable) | 189 (19.8) | 1.00 | – | 1.00 | – |
| 1–<13 | 669 (70.0) | 1.00 | 0.70-1.41 | 1.13 | 0.79-1.62 |
| ≥13 | 98 (10.2) | 1.18 | 0.72-1.95 | 1.23 | 0.74-2.06 |
a
Models adjusted for polychlorinated biphenyl (PCB) concentrations (median PCB in model 1 and 90th percentile PCB in model 2), age at the interview (24–34, 35–39, 40–49, ≥50 years), and smoking history (never, former, and current), where smoking history's treated as a time-dependent covariate, and models stratified by birth cohort (<1940, 1940–1949, 1950–1959, 1960–1973).