Table 3.

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

Variables	Unhappiness					Lonely					Stress
	β	SE	aOR*	95%CI	P	β	SE	aOR*	95%CI	P	β	SE	aOR*	95%CI	P
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 2nd vs Middle school 1st	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 3rd vs Middle school 1st	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 1st vs Middle school 1st	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 2nd vs Middle school 1st	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 3rd vs Middle school 1st	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

^* Adjusted for age, gender, school grade, perceived academic achievement, perceived family economic status, economic support, economic impact of COVID-19