Table 1 Baseline characteristics of participants according to frequency of dairy product consumption
Characteristics | Overall (N = 53,916) | Frequency of dairy product consumption | Ptrend | ||
|---|---|---|---|---|---|
Never |  < 1 Time/week | Weekly | |||
(N = 50,746) | (N = 1757) | (N = 1413) | |||
Mean age (years)a | 52.5 ± 9.9 | 52.7 ± 9.8 | 49.3 ± 10.1 | 49.7 ± 10.4 |  < 0.001 |
Women (%)b | 58.1 | 57.7 | 64.2 | 65.0 |  < 0.001 |
High school or above (%) | 43.5 | 3.3 | 9.8 | 16.6 |  < 0.001 |
Income ≥ 35,000 yuan (%) | 37.8 | 37.2 | 44.0 | 45.5 |  < 0.001 |
Current smokers (%) | 28.0 | 28.1 | 27.1 | 24.0 |  < 0.001 |
Current drinkers (%) | 17.1 | 17.2 | 14.4 | 16.0 | 0.05 |
Physical activity (MET-h/d) | 30.6 ± 15.3 | 31.0 ± 15.2 | 26.9 ± 15.5 | 22.7 ± 14.5 |  < 0.001 |
Consuming meat daily (%) | 15.2 | 14.6 | 19.7 | 28.6 |  < 0.001 |
Consuming fruit daily (%) | 6.7 | 5.4 | 19.1 | 34.8 |  < 0.001 |
Consuming vegetables daily (%) | 93.9 | 93.9 | 93.1 | 93.9 | 0.66 |
BMI (kg/m2) | 22.9 ± 3.1 | 22.9 ± 3.1 | 23.0 ± 3.0 | 23.0 ± 2.9 | 0.081 |
WC (cm) | 76.5 ± 9.1 | 76.5 ± 9.1 | 77.3 ± 8.9 | 76.7 ± 8.7 | 0.26 |
Habitual snoring (%) | 24.3 | 24.4 | 23.7 | 21.3 |  < 0.001 |
Sleep duration (hours) | 7.6 ± 1.2 | 7.6 ± 1.2 | 7.7 ± 1.1 | 7.8 ± 1.1 |  < 0.001 |
Women, post-menopause (%)b | 53.9 | 53.8 | 54.0 | 50.4 | 0.37 |