Table 3 Hierarchical multiple regression of social relationships with SES variables among adolescents

 Age (Years)

−0.02

− 0.08, 0.04

0.52

−0.01

− 0.01

− 0.07, 0.05

0.70

− 0.01

 Gender (Boy vs. Girls)

0.73

0.53, 0.92

< 0.001

0.09

0.71

0.51, 0.91

< 0.001

0.08

 Household registration (Urban vs. Rural)

−0.23

− 0.44, − 0.03

0.03

− 0.03

0.07

− 0.15, 0.30

0.53

0.01

 Family structure (Intact vs. Non-intact)

−1.38

−1.65, −1.11

< 0.001

− 0.12

− 1.28

− 1.55, − 1.01

< 0.001

− 0.11

 Family size (Non-only child vs. only child)

− 0.52

− 0.72, − 0.31

< 0.001

− 0.06

− 0.49

− 0.70, − 0.28

< 0.001

−0.06

 Subjective SES

0.18

−0.01, 0.37

0.06

0.02

 Paternal education level

0.65

0.42, 0.89

< 0.001

0.08

 Maternal education level

−0.20

−0.42, 0.03

0.09

−0.03

 Paternal occupation status

0.54

0.32, 0.77

< 0.001

0.07

 Maternal occupation status

−0.10

−0.27, 0.07

0.25

−0.02

 Adjusted R²

0.025

0.035

 ∆R²

0.026

0.011

 Age (Years)

−0.42

−0.6, −0.23

< 0.001

−0.05

− 0.29

−0.48, − 0.11

< 0.001

−0.04

 Gender (Boy vs. Girls)

1.95

1.33, 2.58

< 0.001

0.07

1.71

1.10, 2.33

< 0.001

0.06

 Household registration (Urban vs. Rural)

−3.40

−4.05, −2.75

< 0.001

−0.13

−0.94

−1.64, − 0.24

0.01

− 0.04

 Family structure (Intact vs. Non-intact)

−4.43

−5.29, − 3.57

< 0.001

− 0.12

− 3.73

−4.58, − 2.89

< 0.001

−0.10

 Family size (Non-only child vs. only child)

−0.46

− 1.11, 0.19

0.17

−0.02

0.09

−0.56, 0.74

0.79

0.003

 Subjective SES

2.45

1.86, 3.03

< 0.001

0.10

 Paternal education level

2.04

1.30, 2.77

< 0.001

0.08

 Maternal education level

1.92

1.21, 2.62

< 0.001

0.08

 Paternal occupation status

2.07

1.38, 2.77

< 0.001

0.08

 Maternal occupation status

−0.12

−0.65, 0.41

0.67

−0.01

 Adjusted R²

0.041

0.081

 ∆R²

0.041

0.041

 Age (Years)

−1.17

−1.34, −1.00

< 0.001

−0.16

−1.11

−1.28, − 0.93

< 0.001

−0.15

 Gender (Boy vs. Girls)

2.29

1.71, 2.87

< 0.001

0.09

2.12

1.54, 2.7

< 0.001

0.09

 Household registration (Urban vs. Rural)

−1.44

−2.04, −0.84

< 0.001

− 0.06

0.06

− 0.6, 0.71

0.87

0.002

 Family structure (Intact vs. Non-intact)

−4.80

−5.58, −4.01

< 0.001

−0.14

−4.37

−5.16, −3.58

< 0.001

− 0.13

 Family size (Non-only child vs. only child)

−0.05

− 0.65, 0.55

0.88

− 0.002

0.36

− 0.25, 0.96

0.25

0.01

 Subjective SES

0.90

0.36, 1.44

< 0.001

0.04

 Paternal education level

1.15

0.47, 1.84

< 0.001

0.05

 Maternal education level

1.52

0.86, 2.18

< 0.001

0.07

 Paternal occupation status

1.13

0.48, 1.77

< 0.001

0.05

 Maternal occupation status

0.20

−0.29, 0.7

0.42

0.01

 Adjusted R²

0.057

0.072

 ∆R²

0.057

0.016