Table 2.
Characteristics of 2,391 study participants in the NHANES 2005–2008
| Characteristics | N=2,391 |
|---|---|
| Sociodemographic characteristics | |
| Sex | |
| Men | 52.7 (1.2) |
| Women | 47.3 (1.2) |
| Age group (years) | |
| 20–29 | 50.4 (1.4) |
| 30–39 | 49.6 (1.4) |
| Education | |
| < High school | 16.6 (1.4) |
| High school | 22.8 (1.3) |
| > High school | 60.6 (2.2) |
| Poverty income ratio | |
| < 1 | 19.0 (1.0) |
| 1–2 | 34.4 (1.6) |
| ≥ 3 | 46.6 (1.6) |
| Race/ethnicity | |
| White | 64.9 (2.5) |
| African American | 12.5 (1.5) |
| Hispanic American | 10.8 (1.2) |
| Other | 11.8 (1.3) |
| Country of birth | |
| US-born | 83.1 (1.7) |
| Foreign-born | 16.9 (1.7) |
| Employment status | |
| Employed | 80.7 (1.1) |
| Unemployed | 19.3 (1.1) |
| Marital status | |
| Married/living with a partner | 60.3 (1.9) |
| Single/other situation | 39.7 (1.9) |
| Lifestyle factors | |
| Physical activity participation | |
| No | 29.2 (1.5) |
| Yes | 70.8 (1.5) |
| Screen time (hours/day) | |
| ≤ 2 | 71.5 (1.8) |
| >2 | 28.5 (1.8) |
| Current smoker | |
| No | 70.5 (1.4) |
| Yes | 29.5 (1.4) |
| Illegal drug use | |
| No | 35.7 (1.8) |
| Yes | 64.3 (1.8) |
| Alcohol drinking | |
| No | 34.7 (1.7) |
| Yes | 65.3 (1.7) |
| Caffeine consumption | |
| Low (< 165 mg/day) | 67.8 (1.7) |
| High (≥ 165 mg/day) | 32.2 (1.7) |
| Health conditions | |
| Weight status | |
| Normal weight (BMI < 25 kg/m2) | 40.2 (1.6) |
| Overweight (BMI: 25–29 kg/m2) | 31.4 (1.3) |
| Obesity (BMI≥30 kg/m2) | 28.4 (1.5) |
| Chronic disease(s) | |
| No | 72.5 (1.2) |
| Yes | 27.5 (1.2) |
| Depression | |
| No | 93.6 (0.4) |
| Yes | 6.5 (0.4) |
*
BMI, body mass index