Table 4 Hotelling-T2 Test of left-behind children's/adolescents’ synthesisHRQoL score

3.59

P < 0.05

Boys

75.33 ± 15.77

68.18 ± 17.11^a

76.78 ± 17.79

64.84 ± 23.78^b

Girls

74.76 ± 14.72

65.34 ± 17.10^b

77.70 ± 17.65

68.94 ± 21.43^a

27.32

P < 0.05

2-4

64.73 ± 18.64^c

69.49 ± 19.17

75.69 ± 18.39

38.56 ± 31.09^c

5-7

71.83 ± 14.00^b

68.51 ± 14.82

73.29 ± 18.37

67.64 ± 19.48^b

8-12

77.88 ± 12.75^a

66.23 ± 16.86

79.15 ± 16.62

74.15 ± 14.53^a

13-18

78.18 ± 14.58^a

65.82 ± 17.21

76.44 ± 18.56

70.97 ± 15.32^ab

2.20

P < 0.05

Uneducated

71.21 ± 14.04

62.56 ± 15.76

60.71 ± 23.69^b

67.50 ± 12.36

Primary school

74.98 ± 14.37

66.63 ± 17.77

77.68 ± 18.72^a

65.74 ± 24.21

Juniormiddle school

74.61 ± 15.24

67.01 ± 16.80

77.15 ± 17.11^a

64.55 ± 23.79

Senior high school or higher

76.90 ± 16.72

67.60 ± 17.55

78.58 ± 16.45^a

73.33 ± 17.79

3.45

P < 0.05

<1

76.79 ± 13.33^a

65.04 ± 16.21

78.41 ± 16.10^a

73.09 ± 16.92^a

1-3

76.77 ± 14.58^a

67.87 ± 16.57

78.94 ± 17.34^a

66.83 ± 22.07^b

3-5

71.06 ± 16.87^b

69.66 ± 16.82

72.71 ± 18.05^b

61.93 ± 24.36^b

>5

74.28 ± 16.32^ab

66.59 ± 18.42

77.03 ± 18.94^a

63.05 ± 25.90^b

4.58

P < 0.05

Never leave

77.33 ± 14.00^a

68.99 ± 15.11

81.72 ± 13.90^a

68.17 ± 22.80^b

<1

78.05 ± 12.89^a

66.07 ± 17.27

78.83 ± 17.65^ab

74.03 ± 14.25^a

1-3

75.66 ± 15.65^a

65.45 ± 17.49

75.31 ± 18.20^bc

64.91 ± 23.23^b

3-5

68.36 ± 16.65^b

69.32 ± 15.63

71.11 ± 16.30^c

57.41 ± 27.73^c

>5

73.34 ± 16.51^a

66.46 ± 18.70

77.17 ± 19.39^ab

63.31 ± 25.34^b

2.45

P < 0.05

0

77.33 ± 14.00^a

68.99 ± 15.11^a

81.72 ± 13.90^a

68.17 ± 22.80^ab

1-3

78.52 ± 13.67^a

68.66 ± 17.31^a

80.73 ± 17.75^a

72.82 ± 15.39^a

4-6

70.29 ± 16.70^b

61.86 ± 15.42^b

73.08 ± 17.93^b

68.38 ± 17.10^ab

7 -12

73.48 ± 16.20^ab

66.64 ± 18.46^ab

74.78 ± 17.90^b

63.41 ± 25.84^b

>12

75.95 ± 14.14^a

67.05 ± 16.35^ab

77.31 ± 18.89^ab

65.00 ± 24.24^ab