Table A2.
Sociodemographic variables of the included and excluded subjects in the study population of pregnant women from San Diego County 2000–2003
| Variable | Category | Included N (%) |
Excluded N (%) |
|---|---|---|---|
| All subjects | 1957 (100%) | 227 (100%) | |
| Sex | Female | 998 (51.0%) | 112 (49.3%) |
| Male | 959 (49.0%) | 115 (50.7%) | |
| Race/ethnicity | Hispanic | 1352 (69.1%) | 171 (75.3%) |
| Asian | 25 (1.3%) | 3 (1.3%) | |
| Black | 81 (4.1%) | 6 (2.6%) | |
| Other | 90 (4.6%) | 8 (3.5%) | |
| White | 409 (20.9%) | 39 (17.2%) | |
| Mother’s birthplace | US | 882 (45.1%) | 98 (43.2%) |
| Mexico | 933 (47.7%) | 115 (50.7%) | |
| Other | 142 (7.3%) | 14 (6.2%) | |
| Maternal age (years) | <21 | 446 (22.8%) | 54 (23.8%) |
| 21–25 | 575 (29.4%) | 59 (26.0%) | |
| 26–30 | 435 (22.2%) | 61 (26.9%) | |
| >30 | 501 (25.6%) | 53 (23.3%) | |
| Maternal education (highest grade) | <9 | 537 (28.0%) | 63 (28.3%) |
| 9–11 | 319 (16.6%) | 38 (17.0%) | |
| 12 | 580 (30.2%) | 74 (33.2%) | |
| >12 | 484 (25.2%) | 48 (21.5%) | |
| Maternal weight (lbs) | <130 | 441 (25.0%) | 55 (24.2%) |
| 131–147 | 438 (24.8%) | 37 (16.3%) | |
| 148–160 | 449 (25.4%) | 78 (34.4%) | |
| >160 | 438 (24.8%) | 57 (25.1%) | |
| Delivery | NVD | 1523 (77.8%) | 161 (70.9%) |
| Caesarean | 434 (22.2%) | 66 (29.1%) | |
| Insurance | Private | 589 (30.1%) | 68 (30.1%) |
| Public | 1368 (69.9%) | 158 (69.9%) |
Abbreviations: N, number of participants; NVD, normal vaginal delivery