Table 1.
Sample characteristics, live births, Tarrant County, 2006–2010 (n = 145,054)
| Total | Birth weight <1,500 grams | Birth weight ≥1,500 grams | p-value | |
|---|---|---|---|---|
| (n = 145,054) | (n = 2,154) | (n = 142,886) | ||
| n (%) | n (%) | n (%) | ||
| Maternal Race/Ethnicity | <0.001 | |||
| Caucasian, non-Hispanic | 60,156 (41.5) | 708 (1.2) | 59,442 (98.8) | |
| African American, non-Hispanic | 22,306 (15.4) | 689 (3.1) | 21,615 (96.9) | |
| Hispanic | 54,553 (37.6) | 659 (1.2) | 53,892 (98.8) | |
| Other, non-Hispanic | 8,039 (5.5) | 98 (1.2) | 7,937 (98.8) | |
| Maternal Age | <0.001 | |||
| < 20 years | 17,117 (11.8) | 290 (1.7) | 16,827 (98.3) | |
| 20-39 years | 124,865 (86.1) | 1,792 (1.4) | 123,061 (98.6) | |
| ≥ 40 years | 3,069 (2.1) | 72 (2.3) | 2,996 (97.7) | |
| Maternal Education | 0.008 | |||
| < High school | 37,899 (26.1) | 526 (1.4) | 37,370 (98.6) | |
| High school | 38,259 (26.4) | 628 (1.6) | 37,627 (98.4) | |
| > High school | 68,839 (47.5) | 996 (1.4) | 67,838 (98.6) | |
| Kotelchuck Index | <0.001 | |||
| Adequate Plus | 32,235 (22.2) | 915 (2.8) | 31,318 (97.2) | |
| Adequate | 53,286 (36.7) | 229 (0.4) | 53,056 (99.6) | |
| Intermediate | 12,300 (8.5) | 212 (1.7) | 12,088 (98.3) | |
| Inadequate | 44,841 (30.9) | 695 (1.6) | 44,142 (98.4) | |
| Plurality | <0.001 | |||
| Single | 140,408 (96.8) | 1,623 (1.2) | 138,772 (98.8) | |
| Multiple | 4,643 (3.2) | 531 (11.4) | 4,112 (88.6) | |
| Previous Preterm Birth | <0.001 | |||
| No | 143,220 (98.7) | 2,073 (1.4) | 141,134 (98.6) | |
| Yes | 1,834 (1.3) | 81 (4.4) | 1,752 (95.6) | |
| STD During Pregnancy | 0.462 | |||
| No | 140,406 (96.8) | 2,079 (1.5) | 138,313 (98.5) | |
| Yes | 4,648 (3.2) | 75 (1.6) | 4,573 (98.4) | |
| Smoking | 0.002 | |||
| No | 137,652 (94.9) | 2,012 (1.5) | 135,627 (98.5) | |
| Yes | 7,402 (5.1) | 142 (1.9) | 7,259 (98.1) | |
| Paternal Race/Ethnicity | <0.001 | |||
| Caucasian, non-Hispanic | 52,356 (36.1) | 590 (1.1) | 51,763 (98.9) | |
| African American, non-Hispanic | 17,821 (12.3) | 487 (2.7) | 17,333 (97.3) | |
| Hispanic | 46,894 (32.3) | 531 (1.1) | 46,362 (98.9) | |
| Other, non-Hispanic | 6,612 (4.6) | 79 (1.2) | 6,533 (98.8) | |
| Missing | 21,371 (14.7) | 467 (2.2) | 20,895 (97.8) | |
| Mother Marital Status | <0.001 | |||
| Married | 87,078 (60.0) | 1,131 (1.3) | 85,940 (98.7) | |
| Not married | 57,970 (40.0) | 1,023 (1.5) | 56,942 (98.2) |
n = number of live births.
Numbers may not equal 100% due to missing data.
Data source: Texas Department of State Health Services.