Table 1. Weighted baseline characteristics of the study population (unweighted, n = 8,907; weighted, n = 13,687,058).
| Variables | Weighted mean ± SD or weighted percent |
|---|---|
| Age, years, mean ± SD | 62.2 ± 0.2 |
| Women, % | 53.2 |
| Income, % | |
| Low | 26.1 |
| Mid-low | 26.0 |
| Mid-high | 25.3 |
| High | 22.6 |
| Region, % | |
| Urban | 72.5 |
| Rural | 27.5 |
| Education, % | |
| Elementary school | 46.0 |
| Middle school | 18.7 |
| High school | 24.2 |
| College graduation | 11.1 |
| Marital status, % | |
| Married | 99.0 |
| Unmarried | 1.0 |
| Alcohol consumption, % | |
| Never | 36.3 |
| ≤ 1 /week | 40.2 |
| 2–3 /week | 12.8 |
| ≥ 4 /week | 10.7 |
| Smoking status, % | |
| Never smoker | 55.2 |
| Ex-smoker | 25.3 |
| Current smoker | 19.5 |
| Body mass index (kg/m2), mean ± SD | 24.05 ± 0.04 |
| Osteoarthritis, % | |
| Non-OA (Pain-/ROA-) (reference) | 59.4 |
| Pain only (Pain+/ROA-) | 7.9 |
| ROA only (Pain-/ROA+) | 20.7 |
| Painful ROA (Pain+/ROA+) | 12.0 |
| Hypertension, % | 37.6 |
| Dyslipidemia, % | 16.9 |
| Diabetes, % | 13.8 |
| Stroke, % | 3.0 |
| Myocardial infarction or angina, % | 4.6 |
| Myocardial infarction, % | 1.5 |
| Lung cancer, % | 0.1 |
| Cervical cancer, % | 0.6 |
| Breast cancer, % | 0.7 |
| Colon cancer, % | 0.7 |
| Stomach cancer, % | 1.0 |
| Pulmonary tuberculosis, % | 6.4 |
| Asthma, % | 3.9 |
| Thyroid disease, % | 4.4 |
| Atopic dermatitis, % | 1.2 |
| Depression, % | 4.8 |
| Chronic kidney disease, % | 0.7 |
| Hepatitis B, % | 1.6 |
| Hepatitis C, %, % | 0.3 |
| Liver cirrhosis, % | 0.6 |