From: Menstrual function among women exposed to polybrominated biphenyls: A follow-up prevalence study
No. in Tertiles of PBB Exposure Measured at Cohort Enrollment, (Range, ppb) | No. in Tertiles of PBB Exposure Estimated at Time of Study Interview (Range, ppb) | Total No. | ||
---|---|---|---|---|
 | Low (0.00–0.06) | Middle (>0.06–0.32) | High (>0.32) |  |
Low (≤ 1.0) | 84 | 27 | 0 | 111 |
Middle (1.0–3.0) | 23 | 69 | 28 | 120 |
High (>3.0) | 5 | 17 | 84 | 106 |
Total No. | 112 | 113 | 112 | 337 |