Table 1.

Age groups and gender distribution in Eastern China sample, respectively

Age group	Gender		Total
	Female	Male
5.00–5.99	20	18	38
6.00–6.99	47	45	92
7.00–7.99	35	44	79
8.00–8.99	52	42	94
9.00–9.99	48	63	111
10.00–10.99	44	48	92
11.00–11.99	45	43	88
12.00–12.99	35	45	80
13.00–13.99	30	44	74
Total	355	392	748