Assessment of life factors affecting the experience of depressive symptoms in adolescents: a secondary analysis using the Korea Youth Risk Behavior Survey

Lee, Jongha; Han, Changsu; Ko, Young-Hoon; Lee, Moon-Soo; Yoon, Ho-Kyoung

doi:10.1186/s13034-021-00407-0

Child and Adolescent Psychiatry and Mental Health

Table 2 Logistic regression analyses of factors associated with the experience of depressive symptoms

From: Assessment of life factors affecting the experience of depressive symptoms in adolescents: a secondary analysis using the Korea Youth Risk Behavior Survey

Variables	Unadjusted model				Adjusted model^a
Variables	OR	95% Cl for OR		p-value	OR	95% Cl for OR		p-value
Gender
Boys	1
Girls	1.879	1.802	1.959	< 0.001	1.998	1.881	2.122	< 0.001
School grade
Middle 1st grade	1				1
Middle 2nd grade	1.305	1.213	1.404	< 0.001	1.123	1.038	1.215	< 0.01
Middle 3rd grade	1.368	1.273	1.470	< 0.001	1.098	1.015	1.188	< 0.05
High 1st grade	1.286	1.195	1.384	< 0.001	0.924	0.849	1.006	0.067
High 2nd grade	1.378	1.280	1.483	< 0.001	0.867	0.795	0.945	< 0.01
High 3rd grade	1.492	1.389	1.604	< 0.001	0.886	0.812	0.966	< 0.01
Perceived health status
Very healthy	1				1
Healthy	1.429	1.352	1.511	< 0.001	1.377	1.297	1.463	< 0.001
Normal	2.326	2.189	2.473	< 0.001	2.115	1.975	2.264	< 0.001
Unhealthy	3.897	3.577	4.247	< 0.001	3.406	3.095	3.748	< 0.001
Very unhealthy	6.393	4.740	8.623	< 0.001	6.198	4.474	8.585	< 0.001
Dietary behavior^b
None	1				1
1 day	1.145	1.049	1.248	< 0.01	1.086	0.989	1.193	0.086
2 days	1.020	0.939	1.107	0.645	0.992	0.908	1.085	0.866
3 days	1.007	0.925	1.095	0.880	0.970	0.886	1.063	0.514
4 days	0.983	0.898	1.076	0.711	0.975	0.884	1.075	0.608
5 days	0.904	0.837	0.977	< 0.05	0.948	0.872	1.031	0.213
6 days	0.820	0.751	0.894	< 0.001	0.895	0.815	0.983	< 0.05
7 days	0.671	0.632	0.712	< 0.001	0.793	0.742	0.847	< 0.001
Physical activity^c
None	1				1
1 day	1.136	1.067	1.209	< 0.001	1.212	1.133	1.297	< 0.001
2 days	1.007	0.945	1.073	0.836	1.181	1.102	1.265	< 0.001
3 days	1.014	0.948	1.085	0.682	1.297	1.203	1.398	< 0.001
4 days	0.943	0.864	1.030	0.193	1.292	1.173	1.425	< 0.001
5 days	0.951	0.869	1.040	0.271	1.328	1.201	1.467	< 0.001
6 days	0.985	0.856	1.134	0.837	1.446	1.241	1.685	< 0.001
7 days	1.054	0.965	1.151	0.244	1.625	1.469	1.797	< 0.001
Time spent studying (WD^d)
360–479 min	1				1
< 240 min	0.990	0.920	1.065	0.777	1.149	1.062	1.243	< 0.01
240–359 min	1.079	0.986	1.182	0.100	1.194	1.083	1.316	< 0.001
480–599 min	1.022	0.949	1.101	0.565	1.015	0.937	1.099	0.715
600–719 min	1.077	0.999	1.161	0.052	1.062	0.978	1.154	0.153
> 720 min	1.178	1.095	1.268	< 0.001	1.125	1.033	1.226	< 0.01
Time spent studying (WK^e)
None	1				1
1–119 min	0.876	0.812	0.944	< 0.001	1.014	0.934	1.100	0.743
120–239 min	0.928	0.864	0.996	< 0.05	1.102	1.018	1.193	< 0.05
240–359 min	0.991	0.919	1.070	0.824	1.217	1.116	1.327	< 0.001
360–479 min	0.985	0.901	1.077	0.744	1.267	1.144	1.404	< 0.001
> 480 min	1.121	1.039	1.210	< 0.01	1.518	1.380	1.670	< 0.001
Duration of internet use (WD^d)
None	1				1
1–60 min	0.885	0.834	0.940	< 0.001	1.025	0.949	1.107	0.531
61–120 min	0.954	0.897	1.014	0.134	1.057	0.974	1.147	0.184
121–180 min	1.057	0.987	1.132	0.115	1.042	0.950	1.144	0.381
> 180 min	1.344	1.259	1.434	< 0.001	1.174	1.068	1.292	< 0.05
Duration of internet use (WK^e)
None	1				1
1–60 min	0.799	0.739	0.865	< 0.001	0.866	0.788	0.952	< 0.01
61–120 min	0.818	0.761	0.879	< 0.001	0.895	0.819	0.979	< 0.05
121–180 min	0.817	0.762	0.877	< 0.001	0.894	0.817	0.979	< 0.05
> 180 min	1.000	0.947	1.057	0.993	0.929	0.854	1.010	< 0.01

CI confidence interval, OR odds ratio
^aAdjusted model for all variables except multicultural family and city type
^bDietary behavior: Number of days per week on which participants ate breakfast
^cPhysical activity: Number of days per week participants engaged in physical activity for at least 60 min per day
^dWD: weekday
^eWK: weekend

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ISSN: 1753-2000

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