Table 2 Demographic information of the study group
Characteristic | Valuea |
|---|---|
Number of mother-child pairs | 133 |
Mean gestational age (wks) | 39.5 (1.6) |
Mean maternal age at delivery (yrs) | 31.1 (4.6) |
Mean parity | 1.1 (1.1) |
Mean pre-pregnancy BMI (kg/m2) | 24.9 (4.7) |
Median tap water arsenic (/g/L) | 0.36 {0.02 - 3.55} |
Median U-As (/g/L) | 4.4 {1.8 - 11.9} |
School Level | Â |
  Less than 11th grade | 3 [2.6] |
  High school graduate or equivalent | 10 [7.5] |
  Junior college graduate or some college | 28 [21.1] |
   or technical school |  |
  College graduate | 55 [41.4] |
  Post-graduate schooling | 18 [13.5] |
  Unknown | 19 [14.3] |
Smoking status | Â |
  Never | 97 [72.9] |
  Former | 13 [9.8] |
  Current | 5 [3.8] |
  Unknown | 18 [13.5] |
Mean infant birth weight (kg) | 3.4 (0.4) |
Infant gender | Â |
  Male | 65 [48.9] |
  Female | 68 [51.1] |
Infant race | Â |
  White | 128 [96.2] |
  Unknown | 5 [3.8] |