Table 1.

Descriptive statistics for the independent variables

	Rural sample			Urban sample
	2000	2004	2006	2000	2004	2006
Individual level	N=6285	N=6536	N=6481	N=2918	N=2893	N=2950
Mean age (years)	43.9 (14.9)	46.8 (14.9)	48.2 (14.9)	47.3 (16.1)	49.9 (16.2)	51.1 (15.9)
Mean household income (RMB)	4728 (4841)	6179 (6467)	7299 (9763)	6403 (5912)	8956 (8346)	10 221 (13 171)
Male (%)	48.6	49.0	48.0	45.7	47.1	47.3
Education (%)
No/primary school	52.0	48.9	48.4	29.9	27.6	25.8
Junior high school	34.4	35.2	33.5	27.1	26.7	26.1
Senior high school or above	13.6	15.9	18.2	43	45.7	48
Currently married (%)	80.7	83.1	84.6	78.2	79.3	80.3
Drinking (%)	35.0	33.8	32.3	36	32.1	31.8
Smoking (%)	32.5	31.2	29.0	27.2	25.3	24.2
Heavy physical activity (%)	60.4	50.5	50.2	3.4	4	5.3
Community level	N=143	N=145	N=145	N=72	N=68	N=71
Region (%)
Northeast	23.1	22.8	22.8	22.2	22.1	21.1
Coastal	21.7	22.1	22.1	22.2	20.6	22.5
Inland	32.9	33.1	33.1	33.3	33.8	35.2
South	22.4	22.1	22.1	22.2	23.5	21.1
Average urbanicity index	49.9 (15.0)	52.9 (16.7)	54.8 (17.3)	77.2 (7.7)	82.9 (10.2)	82.9 (11.3)
Average number of fast-food restaurants	0.2 (0.7)	0.1 (0.5)	0.1 (0.5)	0.8 (1.2)	0.4 (0.8)	0.4 (0.8)
Average number of population	2741 (6540)	3424 (8509)	2735 (2507)	5078 (7243)	8181 (13 150)	7649 (11 338)
Average change in number of fast-food restaurants
From current wave to next	−0.1 (0.7)	0 (0.6)	–	−0.4 (1.5)	0 (1.0)	–
From previous to current wave	–	−0.1 (0.7)	0 (0.6)	–	−0.4 (1.5)	0 (1.0)
Average change in number of population
From current wave to next	704 (10 306)	−688 (7681)	–	2749 (13 256)	−284 (7134)	–
From previous to current wave	–	688 (10 235)	−688 (7681)	–	2812 (13 646)	−170 (6945)

Numbers in parentheses are SDs.