Table 3.

The Correlates of Subjective Insomnia in the Cross-Validation Sample Examined by the Logistic Regression (N = 3965)

Variables	B	SE	Wald	OR	95% CI of OR
					Lower	Upper
Self-reported depression	2.368	0.744	10.128b	10.681	2.484	45.929
Low connectedness to school	0.996	0.180	30.567a	2.706	1.901	3.852
High family conflict	0.616	0.142	18.939a	1.852	1.403	2.445
Self-reported depression × Low connectedness to school	−0.369	0.299	1.528	0.691	0.385	1.241
Self-reported depression × High family conflict	−0.133	0.211	0.398	0.875	0.579	1.324
Low connectedness to school × High family conflict	−0.356	0.201	3.125	0.701	0.472	1.039
Male	−0.277	0.120	5.308c	0.758	0.599	0.960
Older age	0.287	0.120	5.731c	1.332	1.053	1.684
Living in a rural area	−0.166	0.116	2.062	0.847	0.675	1.062
BMI	−0.018	0.015	1.380	0.983	0.954	1.012
Having a part-time job	0.307	0.131	5.531c	1.360	1.053	1.757
Drinking coffee	0.201	0.140	2.057	1.223	0.929	1.609
Low paternal education	−0.025	0.131	0.035	0.976	0.754	1.262
Low maternal education	0.139	0.127	1.187	1.149	0.895	1.475
Low family monitoring	0.140	0.100	1.938	1.150	0.945	1.399
Substance use of family members	0.265	0.121	4.753c	1.303	1.027	1.653
Being in the third year of school	−0.054	0.132	0.165	0.948	0.732	1.228
Low academic achievement	0.466	0.113	17.080a	1.593	1.277	1.987
Time spent with friends	0.160	0.124	1.659	1.173	0.920	1.496
Low connectedness to peer group	0.003	0.003	0.826	1.003	0.997	1.008
Problematic cellular phone use	0.287	0.150	3.677	1.332	0.994	1.786
Problematic Internet use	0.529	0.150	12.530a	1.698	1.266	2.276

^aP < 0.001;

^bP < 0.01;

^cP < 0.05

OR refers to odds ratio; CI, confidence interval; BMI, body mass index.