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Table 3 Factors of suicide attempts by Cox proportional hazard model analysis

From: Insomnia as an independent predictor of suicide attempts: a nationwide population-based retrospective cohort study

Variables Crude HR 95% CI P-value Adjusted HR 95% CI P-value
Insomnia
 no reference     reference    
 yes 7.416 6.524 8.431 < 0.001 3.533 3.059 4.080 < 0.001
Gender
 female reference     reference    
 male 1.289 1.159 1.433 < 0.001 1.522 1.361 1.702 < 0.001
Age group (years)
65 reference     reference    
 15–24 6.477 5.292 7.928 0.001 6.000 4.876 7.383 < 0.001
 25–44 4.909 4.238 5.687 < 0.001 3.581 3.069 4.177 < 0.001
 45–64 1.747 1.487 2.052 < 0.001 1.595 1.357 1.876 < 0.001
Low income
 no reference     reference    
 yes 3.940 3.267 4.751 < 0.001 1.434 1.184 1.736 < 0.001
Catastrophic illness
 No reference     reference    
 Yes 1.972 1.771 2.196 < 0.001 1.286 1.143 1.446 < 0.001
Urbanization
 high reference     reference    
 medium 1.045 0.916 1.193 0.510 1.013 0.887 1.157 0.847
 low 1.569 1.372 1.795 < 0.001 1.073 0.937 1.230 0.309
CCI 0.983 0.969 0.998 0.025 0.989 0.973 1.005 0.179
Drug dependence
 no reference     reference    
 yes 9.614 7.407 12.479 < 0.001 1.592 1.220 2.077 0.001
Alcohol dependence
 no reference     reference    
 yes 5.872 4.899 7.038 < 0.001 1.164 0.955 1.420 0.133
Mental disorders
 no reference     reference    
 yes 9.742 8.723 10.879 < 0.001 4.483 3.934 5.109 < 0.001