表 2.

不同特征人群的儿童青少年奶饮用情况

Milk intake of different characteristic participants

Characteristics	n (%)	Servings of daily milk intake, x±s	Z/H	P	Weekly frequency of milk intake, M (P25, P75)	Z/H	P
Total	2 496(100.00)	0.92±0.84			5(2, 7)
Gender
Boys	1 274(51.04)	0.94±0.84	-1.43	0.153	5(2, 7)	-0.46	0.645
Girls	1 222(48.96)	0.89±0.84			5(2, 7)
Grade
Primary school	1 301(52.12)	0.97±0.88	-3.52	< 0.001	6(3, 7)	-3.98	< 0.001
Junior high school	1 195(47.88)	0.86±0.79			5(1, 7)
Area
Urban	1 161(46.51)	1.01±0.77	-8.07	< 0.001	6(3, 7)	-8.21	< 0.001
Rural	1 335(53.49)	0.83±0.89			4(1, 7)
Parents’ education
Junior high school and below	1 045(41.87)	0.83±0.87	62.76	< 0.001	4(1, 7)	64.26	< 0.001
Senior school	765(30.65)	0.92±0.83			5(2, 7)
Junior college and above	686(27.48)	1.05±0.79			6(4, 7)
Household income
≤2 000 yuan	446(17.87)	0.76±0.86	57.42	< 0.001	4(0, 7)	55.23	< 0.001
＞2 000-＜5 000 yuan	1 152(46.15)	0.90±0.84			5(2, 7)
≥5 000-＜8 000 yuan	511(20.47)	1.03±0.86			6(3, 7)
≥8 000 yuan	387(15.50)	1.01±0.74			6(3, 7)
Obesity
Yes	441(17.67)	0.81±0.78	-2.71	0.007	5(1, 7)	-2.30	0.021
No	2 055(82.33)	0.94±0.85			5(2, 7)