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Table 2 Analyses among work time, insomnia, and depression

From: Effect of long working hours and insomnia on depressive symptoms among employees of Chinese internet companies

  Values to be analyzed Depressive symptom
  ORa 95%CI p-value
Model 1 WT    
≤40 h/week
41–50 h/week 1.32 1.11–1.56 < 0.001
51–60 h/week 1.74 1.35–2.24 < 0.001
> 60 h/week 2.54 1.90–3.39 < 0.001
Insomnia    
Negative  
Positive 2.36 2.04–2.74 < 0.001
Model 2 WT × Insomnia 1.35 1.15–1.59 < 0.001
Nagelkerke R2 0.171   
  1. Note: Model 1: work time and insomnia were simultaneously introduced into the regression adjusted by sex, age, education level, marital status, income, exercise frequency, dietary habits, and smoking status. Model 2 further introduced an interaction value of WT × insomnia based on Model 1; only the interaction coefficient is shown in Table 2. WT of interaction value in model 2 was introduced as a continuous variable. WT work time; a: p < 0.05; CI confident interval; ORa odds ratio adjusted by general characteristics such as sex, age, education level, marital status, income, exercise frequency, dietary habits, and smoking status