Rural left-behind group (n = 440)

Z/χ2

P

Urban migrant group (n = 513)

Z/χ2

P

n

Underweight

Normal

Overweight/

obese

n

Underweight

Normal

Overweight/

obese

Sex

−3.185*

0.001

−0.028*

0.978

Male

226

42 (18.6)

161 (71.2)

23 (10.2)

272

25 (9.2)

138 (50.7)

109 (40.1)

Female

214

33 (15.4)

167 (78.0)

14 (6.6)

241

9 (3.7)

181 (75.1)

51 (21.2)

Age (years)

1.912#

0.591

1.960#

0.581

12

79

19 (24.1)

50 (63.3)

10 (12.6)

152

11 (7.2)

88 (57.9)

53 (34.9)

13

103

14 (13.6)

82 (79.6)

7 (6.8)

168

11 (6.5)

103 (61.3)

54 (32.1)

14

116

17 (14.7)

87 (75)

12 (10.3)

137

10 (7.3)

86 (62.8)

41 (29.9)

15

142

25 (17.6)

109 (76.8)

8 (5.6)

56

2 (3.6)

42 (75.0)

12 (21.4)