Table 1. Demographic data at the time of delivery in hospital discharges among women age 35–44 and age 45 and older compared to women under 35, Nationwide Inpatient Sample years 2008–2010.
| Age<35, n = 10,768,536 | Age 35–44, n = 1,836,403 | Age≥45, n = 23,807 | |||
| n (%) | n (%) | OR (95% CI)p-value | n (%) | OR (95% CI)p-value | |
| Race/Ethnicity, n (%) | |||||
| White | 4,681,697 (43.5) | 878,691 (47.8) | 1.0 | 11,146 (46.8) | 1.0 |
| Black | 1,337,921 (12.4) | 170,568 (9.3) | 0.68 (0.67, 0.68) <0.0001 | 2565 (10.8) | 0.80 (0.76, 0.83) <0.0001 |
| Hispanic | 2,119,897 (19.7) | 303,130 (16.5) | 0.76 (0.76, 0.76) <0.0001 | 3015 (12.7) | 0.59 (0.57, 0.62) <0.0001 |
| Asian/Pacific Islander | 414,366 (3.8) | 143,919 (7.8) | 1.84 (1.83 1.85) <0.0001 | 1768 (7.4) | 1.80 (1.71, 1.89) <0.0001 |
| Native American | 86,452 (0.8) | 9260 (0.5) | 0.57 (0.56, 0.58) <0.0001 | 74 (0.3) | 0.35 (0.28, 0.44) <0.0001 |
| Other | 428,853 (4.0) | 77,900 (4.2) | 0.96 (0.95, 0.97) <0.0001 | 956 (4.0) | 0.93 (0.87, 0.99) 0.0001 |
| Missing | 1,699,350 (15.8) | 252,935 (13.8) | – | 4283 (18.0) | – |
| Age, yrsa | 26.0 (22.0, 30.0) | 37.0 (36.0, 39.0) | – <0.0001 | 46.0 (45.0, 47.0) | – <0.0001 |
| Length of stay, daysa | 2 (2, 3) | 2 (2, 3) | – <0.0001 | 3 (2, 4) | – <0.0001 |
| Total charges, $a | 9792 (6648, 14,800) | 11,340 (7456, 17,298) | – <0.001 | 13,846 (8696, 22,296) | – <0.0001 |
| Private insurance,n (%)b | 4,953,527 (46.0) | 1,281,862 (69.8) | 2.71 (2.70, 2.72) <0.0001 | 16,974 (71.3) | 2.92 (2.83, 3.00) <0.0001 |
| Median houseincome in ZIPcode of lowestquartile, n (%)b , c | 3,021,833 (28.1) | 315,513 (17.2) | 0.53 (0.53, 0.53) <0.0001 | 3823 (16.1) | 0.49 (0.47, 0.51) <0.0001 |
a
Values are median (interquartile). Comparison by Wilcoxon Sign-Rank test.
b
Comparison by Chi-Square.
bc
Median house income $1–$38,999.