Table 1.
Basic characteristics of participants by weight-adjusted-waist index among U.S. adults.
| Characteristics | Weight-adjusted waist index | P value | |||
|---|---|---|---|---|---|
| Q1 (n = 3983) | Q2 (n = 3983) | Q3 (n = 3983) | Q4 (n = 3983) | ||
| Age (yr) | 37.34 ± 14.11 | 46.20 ± 15.63 | 52.71 ± 16.17 | 58.51 ± 16.47 | <.001 |
| Gender, (%) | |||||
| Male | 61.74 | 52.90 | 47.05 | 33.54 | <.001 |
| Female | 38.26 | 47.10 | 52.95 | 66.46 | |
| Race/ethnicity, (%) | |||||
| Mexican American | 7.53 | 13.56 | 16.92 | 18.73 | <.001 |
| Other Hispanic | 7.58 | 9.09 | 11.78 | 11.00 | |
| Non-Hispanic White | 42.93 | 41.88 | 41.02 | 45.44 | |
| Non-Hispanic Black | 27.74 | 20.86 | 19.61 | 16.09 | |
| Other races | 14.21 | 14.61 | 10.67 | 8.74 | |
| Education level, (%) | |||||
| <high school | 14.26 | 20.97 | 27.60 | 34.22 | <.001 |
| High school | 20.54 | 21.24 | 22.72 | 23.88 | |
| >high school | 65.20 | 57.79 | 49.68 | 41.90 | |
| Smoked at least 100 cigarettes in life, (%) | |||||
| Yes | 41.01 | 43.56 | 45.49 | 46.82 | <.001 |
| No | 58.99 | 56.44 | 54.51 | 53.18 | |
| Diabetes, (%) | |||||
| Yes | 2.61 | 6.38 | 14.01 | 24.38 | <.001 |
| No | 97.39 | 93.62 | 85.99 | 75.62 | |
| Coronary heart disease, (%) | |||||
| Yes | 0.85 | 2.66 | 4.47 | 6.90 | <.001 |
| No | 99.15 | 97.34 | 95.53 | 93.10 | |
| High blood pressure, (%) | |||||
| Yes | 15.06 | 29.73 | 41.28 | 54.96 | <.001 |
| No | 84.94 | 70.27 | 58.72 | 45.04 | |
| Family PIR | 2.65 ± 1.70 | 2.63 ± 1.68 | 2.47 ± 1.64 | 2.12 ± 1.50 | <.001 |
| BMI | 24.75 ± 4.58 | 27.72 ± 5.41 | 30.04 ± 6.18 | 33.21 ± 7.54 | <.001 |
| Triglyceride (mg/dL) | 101.97 ± 85.91 | 118.36 ± 89.17 | 139.27 ± 156.51 | 148.95 ± 100.57 | <.001 |
| LDL-C (mg/dL) | 107.89 ± 32.28 | 116.61 ± 35.06 | 116.64 ± 36.60 | 114.61 ± 35.85 | <.001 |
| Total cholesterol (mg/dL) | 184.21 ± 37.90 | 195.62 ± 40.68 | 196.23 ± 42.04 | 195.68 ± 44.58 | <.001 |
| Had at least 12 alcohol drinks/1 yr (%) | |||||
| Yes | 80.81 | 76.31 | 71.88 | 63.96 | <.001 |
| No | 19.19 | 23.69 | 28.12 | 36.04 | |
| Psoriasis, (%) | |||||
| Yes | 2.03 | 2.71 | 2.74 | 3.51 | <.001 |
| No | 97.97 | 97.29 | 97.26 | 96.49 | |
| Asthma, (%) | |||||
| Yes | 13.73 | 12.98 | 13.91 | 17.55 | <.001 |
| No | 86.27 | 87.02 | 86.09 | 82.45 | |
| Arthritis, (%) | |||||
| Yes | 10.42 | 18.80 | 30.36 | 41.78 | <.001 |
| No | 89.58 | 81.20 | 69.64 | 58.22 | |
| Thyroid problems, (%) | |||||
| Yes | 4.87 | 7.68 | 10.92 | 15.49 | <.001 |
| No | 95.13 | 92.32 | 89.08 | 84.51 | |
| Chronic bronchitis, (%) | |||||
| Yes | 2.74 | 4.14 | 5.02 | 9.26 | <.001 |
| No | 97.26 | 95.86 | 94.98 | 90.74 | |
Mean ± SD for continuous variables: the P value was calculated by the weighted linear regression model; (%) for categorical variables: the P value was calculated by the weighted chi-square test.
Abbreviations: BMI = body mass index, LDL-C = low-density lipoprotein, PIR = the ratio of income-to-poverty, Q = quartile.