Table 1.
Demographics for the Entire Population, the Subpopulation Included in the Analysis and the Subpopulation Excluded from the Analysis
| Characteristic | All Enrollees (n=708) | Included in Analysis (n=534) | Excluded Group (n=174) | P-valuea |
|---|---|---|---|---|
| Age (years) | 33.3 (SD=5.0) | 33.1(SD=5.1) | 34.0(SD=4.6) | 0.03 |
| Gravidity | 682b | 519 | 163 | 0.29 |
| 1 | 217(31.8%) | 157(30.3%) | 60(36.8%) | |
| 2 | 222(32.6%) | 174(33.5%) | 48(29.5%) | |
| 3 | 121(17.7%) | 90(17.3%) | 31(19.0%) | |
| ≥ 4 | 122(17.9%) | 98(18.9%) | 24(14.7%) | |
| Race | 707 | 534 | 173 | 0.04 |
| Asian | 15(2.1%) | 12(2.3%) | 3(1.7%) | |
| Black/African Am. | 56(7.9%) | 51(9.6%) | 5(2.9%) | |
| Multi-racial | 1(0.1%) | 1(0.2%) | 0(0.0%) | |
| Native American | 16(2.3%) | 12(2.3%) | 4(2.3%) | |
| White/Caucasian | 619(87.4%) | 458(85.8%) | 161(93.1%) | |
| Ethnicity | 708 | 534 | 174 | 0.77 |
| Hispanic | 22(3.1%) | 16(3%) | 6(3.5%) | |
| Non-Hispanic | 686(96.9%) | 518(97%) | 168(96.5%) | |
| Marital Status | 708 | 534 | 174 | 0.02 |
| Divorced | 22(3.1%) | 19(3.6%) | 3(1.7%) | |
| Married | 619(87.4%) | 456(85.4%) | 163(93.7%) | |
| Never Married | 38(5.4%) | 32(6.0%) | 6(3.5%) | |
| Unmarried/cohabitating | 19(2.7%) | 18(3.4%) | 1(0.6%) | |
| Separated | 9(1.3%) | 9(1.7%) | 0(0%) | |
| Widowed | 1(0.1%) | 0(0.0%) | 1(0.6%) | |
| Times Married | 689 | 518 | 171 | 0.26 |
| 0 | 56(8.1%) | 48(9.3%) | 8(4.7%) | |
| 1 | 548(79.5%) | 404(78.0%) | 144(84.2%) | |
| 2 | 72(10.5%) | 57(11.0%) | 15(8.8%) | |
| 3 | 11(1.6%) | 8(1.5%) | 3(1.8%) | |
| 4 | 2(0.3%) | 1(0.2%) | 1(0.6%) | |
| Education | 697 | 525 | 172 | 0.01 |
| ≤ High School | 44(6.3%) | 42(8.0%) | 2(1.2%) | |
| ≤ College | 403(57.8%) | 301(57.3%) | 102(59.3%) | |
| ≤ Graduate School | 250(35.9%) | 182(34.7%) | 68(39.5%) | |
| Pregnancy Planned | 586 | 478 | 108 | <0.0001 |
| Yes | 422(72.0%) | 325(68.9%) | 97(89.8%) | |
| No | 164(28.0%) | 153(32.0%) | 11(10.2%) | |
a
P-values are for comparisons between subpopulations included and excluded in analysis.
b
Bold numbers are sample sizes of available data for each baseline variable. Due to sporadic missing data, available sample sizes vary for gravidity, race, times married, education