Differential associations of urbanicity and income with physical activity in adults in urbanizing China: findings from the population-based China Health and Nutrition Survey 1991-2009

Attard, Samantha M.; Howard, Annie-Green; Herring, Amy H.; Zhang, Bing; Du, Shufa; Aiello, Allison E.; Popkin, Barry M.; Gordon-Larsen, Penny

doi:10.1186/s12966-015-0321-2

International Journal of Behavioral Nutrition and Physical Activity

Table 1 Median sample characteristics over time according to sex, China Health and Nutrition Survey 1991-2009^a

From: Differential associations of urbanicity and income with physical activity in adults in urbanizing China: findings from the population-based China Health and Nutrition Survey 1991-2009

	Men			Women
	1991	2000	2009	1991	2000	2009
N	4041	4410	4469	4382	4730	4768
Age, years	38.3	43.6	48.2	38.0	43.7	48.9
Age, years	(28.0, 51.3)	(32.3, 54.1)	(38.2, 58.8)	(28.1, 50.8)	(33.3, 53.9)	(38.9, 59.0)
Income, 1000 Yuan^b	8.6	10.4	19.5	8.6	10.3	17.9
Income, 1000 Yuan^b	(13.0, 19.7)	(18.7, 29.9)	(34.9, 58.8)	(13.0, 19.5)	(18.5, 30.0)	(33.0, 56.7)
Urbanicity^c	32.1	43.0	50.8	32.3	43.5	51.1
Urbanicity^c	(44.5, 61.0)	(55.8, 76.8)	(64.2, 85.1)	(44.9, 61.0)	(57.4, 76.9)	(65.6, 85.4)
Total PA^d
MET-hours/week	336.0	239.9	160.0	401.7	243.9	143.2
MET-hours/week	(168.0, 576.0)	(106.0, 385.5)	(73.0, 301.5)	(192.0, 651.1)	(94.0, 420.5)	(61.7, 304.4)
Hours/week	70.0	56.0	50.5	89.3	61.6	51.2
Hours/week	(51.0, 102.0)	(40.7, 83.3)	(21.0, 77.8)	(62.0, 125.5)	(35.8, 92.7)	(23.3, 80.0)
Occupational PA^d
MET-hours/week	304.0	224.0	138.0	330.0	204.0	80.0
MET-hours/week	(132.0, 558.0)	(80.0, 366.0)	(36.0, 280.0)	(106.0, 582.0)	(42.0, 366.0)	(0.0, 240.0)
Hours/week	60.0	54.0	49.0	60.0	48.5	40.0
Hours/week	(48.0, 96.0)	(40.0, 82.0)	(39.0, 80.0)	(48.0, 98.0)	(37.0, 77.0)	(8.0, 63.0)
Domestic PA^d
MET-hours/week	1.7	0.0	2.8	49.7	32.0	38.1
MET-hours/week	(0.0, 19.3)	(0.0, 13.1)	(0.0, 18.7)	(23.6, 78.9)	(15.8, 48.8)	(22.4, 58.3)
Hours/week	1.0	0.0	1.2	21.0	14.0	16.3
Hours/week	(0.0, 8.2)	(0.0, 5.8)	(0,0, 8.2)	(10.3, 32.8)	(7.0, 21.0)	(9.3, 24.5)
Leisure PA^d
MET-hours/week	--	0.0	0.0	--	0.0	0.0
MET-hours/week	--	(0.0, 0.0)	(0.0, 0.0)		(0.0, 0.0)	(0.0, 0.0)
Hours/week	--	0.0	0.0	--	0.0	0.0
Hours/week	--	(0.0, 0.0)	(0.0, 0.0)		(0.0, 0.0)	(0.0, 0.0)
Travel PA^d
MET-hours/week	--	5.0	0.0	--	4.7	0.0
MET-hours/week	--	(0.0, 12.5)	(0.0, 5.0)		(0.0, 10.8)	(0.0, 5.0)
Hours/week	--	2.5	0.8	--	2.5	1.7
Hours/week	--	(1.3, 5.0)	(0.0, 2.5)	--	(1.3, 5.0)	(0.0, 2.5)

^aAll cells are shown as median (25^th percentile, 75^th percentile). Kruskal-Wallis tests for difference in median values over time were statistically significant at the p < 0.05 level for all characteristics in men and women
^bHousehold income derived inflated to 2009 Yuan values
^cUrbanicity defined by a multicomponent urbanicity scale with possible score of 0-120 points
^dPA values derived from self-reported questionnaires
Abbreviations: PA physical activity

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