Table 1. Basic characteristics of the study population (n = 3471).
| Basic characteristics | NAFLD | Non-NAFLD | P |
|---|---|---|---|
| N (%) | 998 (28.8) | 2473 (71.2) | - |
| Age (years) | 51.70 (6.76) | 51.81 (7.09) | 0.955 |
| Sex (%) | <0.001 | ||
| Male | 56.2 | 40 | |
| Female | 43.8 | 60 | - |
| Cigarette smoking (%) | 0.078 | ||
| Yes | 21.0 | 18.4 | - |
| No | 79.0 | 81.6 | - |
| Nutritional supplementary (%) | 0.020 | ||
| Yes | 34.3 | 38.5 | - |
| No | 65.7 | 61.5 | - |
| Education Background (%) | <0.001 | ||
| High school or above | 52.7 | 44.5 | - |
| Below high school | 47.3 | 55.5 | - |
| Activity level (h/week) | 2.08 (3.27) | 2.44 (3.65) | 0.057 |
| BMI (kg/m2) | 26.07 (2.56) | 22.69 (2.47) | <0.001 |
| Obesity (BMI≥28 kg/m2, %) | 21.6 | 1.9 | <0.001 |
| Menopause (% in women) | 52.6 | 43.3 | 0.001 |
| Dietary energy intake (Kcal/day) | 1578.52 (663.41) | 1560.31 (699.19) | 0.096 |
| Dietary fiber intake (g/day) | 18.14 (13.75) | 17.35 (14.5) | 0.024 |
| Dietary fat intake (g/day) | 74.70 (31.14) | 72.57 (32.72) | 0.004 |
| Dietary vitamin E intake (mg/day) | 29.38 (14.16) | 28.63 (14.03) | 0.030 |
| Dietary vitamin C intake (mg/day) | 119.28 (77.17) | 123.10 (84.66) | 0.516 |
Continuous data were expressed as mean (SD). NAFLD: Non-alcoholic fatty liver disease, BMI: body mass index.