Table 1. Baseline demographic characteristics and frequency of consumption of 16 food categories by sex in the analyzed subset of the Linxian Nutrition Intervention Trials, Linxian, China.

	All participants	Men	Women
No. of participants (n, %)	2445 (100.0)	1104 (45.2)	1341 (54.8)
Age groups (n, %)
<50	664 (27.2)	239 (21.6)	425 (31.7)
50–59	909 (37.2)	398 (36.1)	511 (38.1)
≥60	872 (35.6)	467 (42.3)	405 (30.2)
Smoking (n, %)
Non-smoker	1688 (69.1)	352 (31.9)	1336 (99.8)
Smoker	754 (30.9)	752 (68.1)	2 (0.2)
Alcohol drinking (n, %)
Non-drinker	1888 (77.3)	682 (61.8)	1206 (90.1)
Drinker	554 (22.7)	422 (38.2)	132 (9.9)
BMI (Median, IQR)	21.3 (19.8, 23.0)	21.2 (19.9, 22.6)	21.5 (19.8, 23.4)
Grains, times/day (Median, IQR)
Non-whole	3.4 (2.8, 4.5)	3.4 (3.0, 4.6)	3.4 (2.7, 4.5)
Whole	2.0 (0.2, 2.0)	1.2 (0.1, 2.0)	2.0 (0.3, 2.0)
Vegetables, times/week (Median, IQR)
Dark green	0.0 (0.0, 2.0)	0.0 (0.0, 2.0)	0.0 (0.0, 2.0)
Orange	2.0 (0.0, 7.0)	2.0 (0.0, 7.0)	2.0 (0.0, 7.0)
Starchy	2.2 (0.5, 7.0)	2.7 (0.5, 7.0)	2.2 (0.5, 7.0)
Cruciferous	0.0 (0.0, 7.0)	0.0 (0.0, 7.0)	0.2 (0.0, 7.0)
Liliacae	2.0 (0.0, 7.0)	2.0 (0.0, 7.0)	1.0 (0.0, 7.0)
Others	5.2 (2.5, 9.2)	5.2 (2.5, 9.1)	5.4 (2.5, 9.5)
Beans, times/week (Median, IQR)	2.0 (0.7, 5.0)	2.0 (0.7, 5.0)	2.0 (0.5, 5.0)
Fruits, times/month (Median, IQR)
Citrus/melon	0.0 (0.0, 0.7)	0.0 (0.0, 1.0)	0.0 (0.0, 0.7)
Non-citrus	0.3 (0.0, 2.0)	0.7 (0.0, 2.3)	0.0 (0.0, 2.0)
Nuts, times/month (Median, IQR)	0.3 (0.0, 3.0)	0.5 (0.0, 4.3)	0.0 (0.0, 2.0)
Meat and fish, times/month (Median, IQR)
Red meat	0.7 (0.0, 2.0)	1.0 (0.0, 2.0)	0.3 (0.0, 2.0)
White meat	0.0 (0.0, 0.0)	0.0 (0.0, 0.0)	0.0 (0.0, 0.0)
Fish	0.0 (0.0, 0.0)	0.0 (0.0, 0.0)	0.0 (0.0, 0.0)
Eggs, times/month (Median, IQR)	1.0 (0.3, 4.3)	2.0 (0.7, 4.3)	1.0 (0.0, 4.3)

IQR, Interquartile Range.