Table 1 Characteristics of participants. Mexico City, Mexico, 1997–2004
All subjects (n = 207) | No miscarriages (n = 136) | ≥ 1 miscarriage (n = 71) | |||||
|---|---|---|---|---|---|---|---|
Variable | Mean | SD† | Mean | SD | Mean | SD | p* |
Age (years) | 27.76 | 5.33 | 27.57 | 4.88 | 28.11 | 6.13 | 0.60 |
Years in school | 9.4 | 4.04 | 9.49 | 3.82 | 9.23 | 4.45 | 0.90 |
Pregnancies | 1.65 | 0.90 | 1.38 | 0.64 | 2.17 | 1.08 | <0.01 |
Miscarriages | 0.42 | 0.67 | -- | -- | 1.23 | 0.57 | -- |
Blood Pb (μg/L) | 62.4 | 44.82 | 64.73 | 49.46 | 57.95 | 34.09 | 0.37 |
Plasma Pb (μg/L) | 0.14 | 0.13 | 0.13 | 0.13 | 0.14 | 0.13 | 0.15 |
Plasma Pb/Blood Pb ratio (%) | 0.22 | 0.14 | 0.21 | 0.13 | 0.25 | 0.17 | 0.02 |