Table 1.

Demographic characteristics according to quartiles of physical activity.

	Physical activity (METs/day)
	Total	Q1	Q2	Q3	Q4	p-value
	19.5 (11.3, 35.6)	<11.3	11.3–19.4	19.5–35.5	≥35.6
	n = 8,811	n = 2,230	n = 2,047	n = 2,251	n = 2,283
Age (years)	50 (44, 60)	49 (44, 59)	48 (43, 57)†	49 (44, 58)	56 (48, 63)†	<0.001
Sex						<0.001
Male	4,235	1,072 (25.3%)	920 (21.7%)	1,068 (25.2%)	1,175 (27.8%)
Female	4,576	1,158 (25.3%)	1,127 (24.6%)	1,183 (25.9%)	1,108 (24.2%)
Residence						<0.001
Urban	4,317	1,229 (28.5%)	1,468 (34.0%)	1,378 (31.9%)	242 (5.6%)
Rural	4,494	1,001 (22.3%)	579 (12.9%)	873 (19.4%)	2,041 (45.4%)
Education						<0.001
≤Elementary school	2,958	673 (22.8%)	475 (16.0%)	599 (20.3%)	1,211 (40.9%)
Middle/high school	4,666	1,199 (25.7%)	1,182 (25.3%)	1,314 (28.2%)	971 (20.8%)
College/university	1,187	358 (30.2%)	390 (32.9%)	338 (28.5%)	101 (8.4%)
Follow-up duration (months)	139 (97, 141)	139 (95, 141)	139 (97, 142)†	139 (108, 141)	139 (98, 142)†	0.002
Occupation						<0.001
Housewife	2,453	728 (29.7%)	711 (29.0%)	742 (30.2%)	272 (11.1%)
Office work	391	123 (31.5%)	151 (38.6%)	98 (25.1%)	19 (4.8%)
Agriculture	2,486	343 (13.8%)	175 (7.0%)	410 (16.5%)	1,558 (62.7%)
Self-employment	1,250	349 (27.9%)	403 (32.2%)	381 (30.5%)	117 (9.4%)
Sales	110	29 (26.4%)	42 (38.2%)	28 (25.4%)	11 (10.0%)
Factory production	470	114 (24.3%)	125 (26.6%)	138 (29.4%)	93 (19.7%)
Professional work	357	106 (29.7%)	101 (28.3%)	109 (30.5%)	41 (11.5%)
Others	1,258	415 (33.0%)	336 (26.7%)	343 (27.3%)	164 (13.0%)

Data shown with percentages in parentheses represent numbers of participants, and data shown with two numbers in parentheses represent median values with interquartile ranges in parentheses.

^†p < 0.01 vs. Q1. Kruskal-Wallis test (Dunn’s post hoc).