Table 2.
Odds ratio (95% CI) of being infertile associated with blood lead and blood cadmium levels.
| Concentrations | Prevalence, n (%) | Unadjusted OR | Adjusted | |||
|---|---|---|---|---|---|---|
| Infertile 1 | Pregnant 2 | Model 1 3 | Model 2 4 | |||
| Blood lead levels | ||||||
| per 2-fold increase | 82 | 42 | 2.06 (1.32–3.23) | 1.81 (1.11–2.95) | 2.60 (1.05–6.41) | |
| Tertiles | Tertile 1 | 19 (48.72) | 20 (51.28) | Reference | Reference | Reference |
| Tertile 2 | 32 (76.19) | 10 (23.81) | 3.99 (1.60–9.99) | 3.86 (1.32–11.26) | 5.40 (1.47–19.78) | |
| Tertile 3 | 31 (72.09) | 12 (27.91) | 3.08 (1.26–7.54) | 3.01 (0.94–9.57) | 5.62 (1.13–27.90) | |
| Blood cadmium levels | ||||||
| per 2-fold increase | 1.18 (0.83–1.66) | 1.24 (0.89–1.71) | 1.84 (1.07–3.15) | |||
| Tertiles | Tertile 1 | 24 (60.00) | 16 (40.00) | Reference | Reference | Reference |
| Tertile 2 | 29 (69.05) | 13 (30.95) | 1.19 (0.35–4.09) | 0.84 (0.22–3.19) | 1.15 (0.22–5.90) | |
| Tertile 3 | 29 (69.05) | 13 (30.95) | 1.59 (0.60–4.26) | 1.55 (0.62–3.86) | 2.47 (0.6–10.17) | |
1 ‘Infertile’ if subject responded ‘yes’ to the following question: “Have you ever attempted to become pregnant over a period of at least a year without becoming pregnant?” 2 ‘Pregnant’ if positive pregnancy test or self-reported pregnancy at exam 3 Adjusted for age only 4 Adjusted for age, ethnicity, annual family income, education, marital status, smoking history, alcohol consumption, physical activity and BMI.