Table 1 Univariate description of demographic characteristics, bone/blood Pb concentrations, and cortisol sample characteristics of 936 Mexico City pregnant women (2007–2011)
Variable | N (%) | Mean (SD) | Min, Max |
|---|---|---|---|
Maternal Age | Â | 27.8 (5.5) | 18.0, 44.0 |
Maternal Education | Â | 11.9 (2.9) | 0.0, 21.0 |
Maternal Weight | Â | 64.7 (11.0) | 40.0, 108.0 |
Maternal Height | Â | 1.6 (0.1) | 1.4, 1.8 |
Maternal BMI (kg/m2) | Â | 26.9 (4.2) | 17.4, 44.7 |
Weeks Gestation at Cortisol Collection | Â | 19.7 (2.4) | 14.1, 35.1 |
Calf Circumference at 1-Month visit (cm) | Â | 33.6 (3.2) | 25.0, 47.0 |
Negative Life Events Score | Â | 3.1 (2.1) | 0.0, 11.0 |
Edinburgh Postnatal Depression Scale Score | Â | 8.4 (5.6) | 0.0, 28.0 |
Maternal 2nd Trimester Blood Pb Concentration (µg/dL) |  | 3.7 (2.7) | 0.5, 23 |
Maternal Tibia Pb Concentration (µg/g) |  | 2.7 (8.4) | ND, 20 |
Maternal Patella Pb Concentration (µg/g) |  | 4.6 (8.6) | ND, 43 |
Waking Time (SD in minutes) | Â | 0747 (83) | 0305-1300 |
Hour of Sleep (hours) 1 | Â | 8.3 (1.6) | 0.0, 14.5 |
Marital Status | Â | Â | Â |
Married | 537 (57.4) | 537 (57.4) | Â |
Free Union | 226 (24.1) | 226 (24.1) | Â |
Single/Divorced/Separated | 173 (18.5) | 173 (18.5) | Â |
Number of prior children | Â | Â | Â |
1 | 356 (38.0) | 356 (38.0) | Â |
2 | 339 (36.2) | 339 (36.2) | Â |
3 | 175 (18.7) | 175 (18.7) | Â |
4+ | 66 (7.1) | 66 (7.1) | Â |
Smoking Status During Pregnancy | Â | Â | Â |
Never | 614 (65.6) | 614 (65.6) | Â |
Former | 316 (33.8) | 316 (33.8) | Â |
Current | 6 (0.6) | 6 (0.6) | Â |
Weekday Cortisol Collection1 | Â | Â | Â |
No | 333 (35.6) | 333 (35.6) | Â |
Yes | 603 (64.4) | 603 (64.4) | Â |