Table 1.
Characteristics of non-pregnant reproductive-age women (20–49 years), NHANES 1999–2008
| 1999–2000 (n = 1,023) | 2001–2002 (n = 1,198) | 2003–2004 (n = 1,042) | 2005–2006 (n = 1,123) | 2007–2008 (n = 1,372) | P for trend | |
|---|---|---|---|---|---|---|
| Age, year, mean (± SE) | 35.0 (0.2) | 34.9 (0.4) | 35.4 (0.3) | 35.3 (0.3) | 35.2 (0.4) | 0.866 |
| Race/ethnicity, % (± SE) | ||||||
| White | 69.7 (3.4) | 69.0 (2.7) | 71.4 (3.6) | 71.2 (2.8) | 69.9 (3.7) | 0.194 |
| Black | 13.4 (2.0) | 13.7 (2.4) | 14.4 (2.1) | 14.5 (2.3) | 14.2 (2.5) | 0.826 |
| Hispanic | 7.2 (1.6) | 8.8 (1.0) | 9.5 (2.2) | 9.7 (1.1) | 9.6 (1.9) | <0.001* |
| Othersa | 9.6 (3.5) | 8.5 (2.5) | 4.7 (0.8) | 4.6 (1.0) | 6.4 (1.5) | <0.001* |
| Education, % (± SE) | ||||||
| Less than high school | 17.9 (1.3) | 16.8 (1.6) | 15.1 (1.4) | 13.7 (1.7) | 18.0 (1.7) | 0.100 |
| High school diploma | 25.8 (2.6) | 23.4 (1.5) | 24.6 (1.4) | 21.6 (1.3) | 20.9 (1.1) | 0.072 |
| More than high school | 56.3 (3.0) | 59.8 (2.5) | 60.3 (1.4) | 64.7 (2.5) | 61.1 (2.3) | 0.072 |
| Marital status, % (± SE) | ||||||
| Never married | 24.0 (2.1) | 22.9 (2.0) | 23.6 (1.7) | 21.3 (1.9) | 24.4 (2.4) | 0.841 |
| Married/live together | 58.0 (1.8) | 64.5 (1.9) | 60.6 (1.4) | 65.8 (2.2) | 61.7 (2.3) | 0.317 |
| Widowed/divorced/separated | 18.0 (1.4) | 12.6 (1.2) | 15.8 (1.9) | 12.8 (1.2) | 13.9 (1.0) | 0.549 |
| Household income, % (± SE) | ||||||
| <$20,000 | 19.2 (2.3) | 19.9 (1.1) | 17.4 (1.7) | 13.3 (1.1) | 16.5 (1.7) | 0.110 |
| $20,000–$34,999 | 25.9 (2.0) | 17.1 (1.2) | 20.0 (2.0) | 17.9 (1.5) | 19.8 (1.3) | 0.549 |
| $35,000–$64,999 | 24.8 (1.7) | 27.7 (1.3) | 28.5 (1.8) | 26.1 (1.3) | 23.4 (1.9) | 0.549 |
| $65,000 and above | 30.1 (3.8) | 35.2 (1.7) | 34.1 (2.7) | 42.7 (2.8) | 40.3 (3.3) | 0.110 |
| Current smoking status, % (± SE) | 30.2 (1.6) | 29.0 (1.9) | 31.3 (2.0) | 28.0 (2.1) | 26.8 (2.0) | 0.800 |
Data are weighted to the US population
*
Statistical significance (P < 0.05) over the 5 NHANES cycles between 1999 and 2008
a
Includes American Indian, Native Alaskan, Asian or Pacific Islander, and other race not specified