Table A2. Descriprive Statistics for Analytic Variables Between the Complete Case and Full Study Sample.
| Weighted Percentages | ||||
|---|---|---|---|---|
|
|
||||
| In complete case (births=6849; mothers=3835) | Excluded from Complete Case (births=1994; mothers=834) | p-value | ||
| Race(%)a | <0.001 | |||
| White | 72.84 | 86.23 | ||
| Black | 20.98 | 9.15 | ||
| Hispanic | 6.18 | 4.62 | ||
| GWG (mean (SD)) | 14.50 (7.27) | 14.10 (6.58) | 0.8 | |
| GWG Ratio (mean (SD)) | 1.26 (0.76) | 1.27 (0.73) | 0.06 | |
| GWG Adequacy (%) | 0.06 | |||
| Inadequate | 26.04 | 23.07 | ||
| Adequate | 28.53 | 32.5 | ||
| Excessive | 45.43 | 44.43 | ||
| Pre-pregnancy Weight (%) | <0.001 | |||
| Underweight | 11.39 | 7.74 | ||
| Normal | 66.89 | 66.77 | ||
| Overweight | 14.64 | 16.35 | ||
| Obese | 7.09 | 9.14 | ||
| Parity (%) | <0.001 | |||
| 0 | 47.35 | 42.31 | ||
| 1 | 30.13 | 35.38 | ||
| 2 | 14.88 | 15.18 | ||
| 3 | 5.19 | 4.95 | ||
| 4 | 1.37 | 1.47 | ||
| 5 | 0.86 | 0.38 | ||
| 6 | 0.1 | 0.15 | ||
| 7 | 0.09 | 0.12 | ||
| 8 | 0.00 | 0.04 | ||
| 9 | 0.04 | 0.02 | ||
| Education (%) | <0.001 | |||
| Less than high school | 34.03 | 14 | ||
| High school | 53.73 | 66.38 | ||
| College | 12.24 | 19.62 | ||
| Participant's Mother's Education (%) | <0.001 | |||
| Less than high school | 43.89 | 29.84 | ||
| High school | 49.56 | 60.75 | ||
| College | 6.55 | 9.42 | ||
| Equivalized Income (mean (SD))b | 9.68 (1.31) | 9.83 (1.18) | 0.003 | |
| Household Income (y2000 dollars; mean (SD)) |
16955.93 | 44872.73 | <0.001 | |
| Family size (mean (SD)) | 3.74 | 3.27 | <0.001 | |
| Employment (%) | <0.001 | |||
| Unemployed | 64.90 | 30.09 | ||
| Part-time | 17.38 | 30.59 | ||
| Full-time | 17.72 | 39.32 | ||
| Married (%) | 60.55 | 78.68 | <0.001 | |
| Smoking During Pregnancy (%) | 27.84 | 28.43 | 0.44 | |
| Gestational Age (mean (SD)) | 38.60 (2.23) | 38.63 (2.02) | 0.83 | |
| Child's Birth Year (mean (SD)) | 1987 (5.75) | 1988 (5.38) | <0.001 | |
| Mother's Age at Birth (mean (SD)) | 25.52 (5.87) | 26.74 (5.12) | <0.001 | |
a
N represent mothers in the data set (N=3835)
b
Equivalized income was calcluated to adjust for family size. For a family of 4 in year 2000 (the year to which all incomes in our data set are standardized to) our mean equivalized income of 9.68 corresponds to an aggregate houshold income of $27,086.