Table 2. Results of multiple logistic regression on associations of suicidal ideation with internet addiction and quality of life, controlling for demographic, lifestyle, and clinical variables.

Variables	OR (95% CI)	P
Gender (female vs. male)	1.10 [0.99–1.21]	0.052
Age (years)	0.96 [0.92–1.01]	0.089
Place of hometown (rural vs. urban)	0.97 [0.89–1.07]	0.536
Smoking (yes vs. no)	1.56 [1.29–1.90]	<0.001
Alcohol drinking (yes vs. no)	1.37 [1.18–1.58]	<0.001
Insomnia (yes vs. no)	1.09 [0.99–1.20]	0.068
Score of depression subscale of the Symptom Checklist-90-R	1.16 [1.15–1.17]	<0.001
Internet addiction (yes vs. no)	1.15 [1.05–1.27]	0.003
Quality of life score	1.09 [1.07–1.10]	<0.001