Table 3 Generalized linear model analysis of factors influencing unhappiness, lonely and perceived stress in the KYRBS 2020 adolescents (n = 54,948) in Korea

Gender

 Girls vs Boy

0.19

0.01

1.21

1.19–1.23

 < 0.001

0.38

0.01

1.46

1.43–1.49

 < 0.001

0.31

0.01

1.36

1.34–1.39

 < 0.001

School grade (14-19 years)

 Middle school 2^nd vs Middle school 1^st

0.08

0.02

1.08

1.05–1.12

 < 0.001

0.07

0.02

1.07

1.04–1.11

 < 0.001

0.05

0.02

1.05

1.01–1.09

0.01

 Middle school 3^rd vs Middle school 1^st

0.11

0.02

1.12

1.07–1.17

 < 0.001

0.11

0.03

1.12

1.06–1.17

 < 0.001

0.09

0.02

1.09

1.04–1.15

 < 0.001

 High school 1^st vs Middle school 1^st

0.01

0.03

1.01

0.95–1.08

0.004

0.15

0.03

1.16

1.09–1.24

 < 0.001

0.09

0.03

1.09

1.03–1.16

0.007

 High school 2^nd vs Middle school 1^st

0.17

0.04

1.19

1.10–1.28

 < 0.001

0.17

0.04

1.19

1.09–1.29

 < 0.001

0.17

0.04

1.19

1.10–1.28

 < 0.001

 High school 3^rd vs Middle school 1^st

0.21

0.05

1.23

1.12–1.36

 < 0.001

0.15

0.05

1.16

1.05–1.29

0.006

0.24

0.05

1.27

1.15–1.40

 < 0.001

Perceived academic achievement

 High vs Middle

-0.10

0.02

0.90

0.87–0.94

 < 0.001

0.05

0.02

1.05

1.01–1.09

0.008

-0.01

0.02

0.99

0.95–1.03

0.76

 Middle-High vs Middle

-0.04

0.01

0.96

0.94–0.98

 < 0.001

0.04

0.01

1.04

1.02–1.06

0.002

0.01

0.01

1.01

0.99–1.03

0.69

 Middle-Low vs Middle

0.10

0.01

1.11

1.08–1.13

 < 0.001

0.10

0.01

1.11

1.08–1.13

 < 0.001

0.08

0.01

1.08

1.06–1.10

 < 0.001

 Low vs Middle

0.27

0.02

1.31

1.26–1.36

 < 0.001

0.16

0.02

1.17

1.13–1.22

 < 0.001

-0.17

0.02

0.84

0.81–0.88

 < 0.001

Perceived family economic status

 High vs Middle

-0.31

0.01

0.73

0.72–0.75

 < 0.001

-0.17

0.02

0.84

0.81–0.88

 < 0.001

0.13

0.02

1.14

1.10–1.18

 < 0.001

 Middle-High vs Middle

-0.13

0.01

0.88

0.86–0.90

 < 0.001

0.02

0.01

1.02

1.00–1.04

0.062

-0.004

0.01

1.00

0.98–1.02

0.69

 Middle-Low vs Middle

0.25

0.02

1.28

1.23–1.34

 < 0.001

0.25

0.02

1.28

1.23–1.49

 < 0.001

-0.18

0.01

0.84

0.82–0.85

 < 0.001

 Low vs Middle

0.41

0.03

1.51

1.42–1.60

 < 0.001

0.32

0.04

1.38

1.27–1.49

 < 0.001

-0.31

0.03

0.73

0.69–0.78

 < 0.001

Economic support (in the last 12 months)

 Yes vs No

-0.52

0.02

0.59

0.58–0.61

 < 0.001

0.95

0.02

2.59

2.50–2.67

 < 0.001

-0.03

0.014

0.97

0.94–1.00

0.033

Economic impact of COVID-19

 Yes vs No

0.80

0.01

2.23

2.19–2.27

 < 0.001

0.18

0.01

1.20

1.17–1.22

 < 0.001

0.13

0.01

1.14

1.12–1.16

 < 0.001