Physical Activity and Sedentary Behaviors of Urban Chinese Children: Grade Level Prevalence and Academic Burden Associations

Table 1

Demographic characteristics and sample size for analyses (Shanghai, China 2014).

Grade	Gender	Weighted	95% CI	Subgroup count
1	Male	52.0%	50.8%–53.2%	1719
	Female	48.0%	46.8%–49.2%	1587
2	Male	51.2%	49.8%–52.6%	2381
	Female	48.8%	47.4%–50.2%	2270
3	Male	51.1%	49.7%–52.6%	2409
	Female	48.9%	47.4%–50.3%	2301
4	Male	51.6%	50.1%–53.1%	2745
	Female	48.4%	46.9%–49.9%	2578
5	Male	51.9%	51.2%–52.6%	2808
	Female	48.1%	47.4%–48.8%	2603
6	Male	51.4%	49.7%–53.2%	2017
	Female	48.6%	46.8%–50.3%	1905
7	Male	48.5%	46.9%–50.1%	2408
	Female	51.5%	49.9%–53.1%	2559
8	Male	49.7%	48.9%–50.5%	2466
	Female	50.3%	49.5%–51.1%	2498
9	Male	49.8%	46.6%–53.0%	1229
	Female	50.2%	47.0%–53.4%	1241
10	Male	49.4%	46.6%–52.2%	2011
	Female	50.6%	47.8%–53.4%	2059
11	Male	48.0%	45.8%–50.2%	1586
	Female	52.0%	49.8%–54.2%	1718
12	Male	48.5%	45.0%–52.0%	1124
	Female	51.5%	48.0%–55.0%	1194

Note. Sample size = 48,118. are weighted according to student populations by grade level and schools in Shanghai.