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Table 2 Effect estimates of effects of sleep quality on depressive symptoms in undergraduate students mediated via internet addiction

From: Sleep quality, internet addiction and depressive symptoms among undergraduate students in Nepal

  Model 1 Model 2 Model 3 Model 4
b (SE) BCa 95% CI b (SE) BCa 95% CI b (SE) BCa 95% CI b (SE) BCa 95% CI
Indirect effect 0.146 (0.024) 0.103, 0.197 0.145 (0.024) 0.103, 0.198 0.140 (0.024) 0.098, 0.192 0.138 (0.025) 0.096, 0.192
Direct effect 0.717 (0.051) 0.617, 0.817 0.720 (0.051) 0.620, 0.820 0.713 (0.051) 0.613, 0.814 0.697 (0.052) 0.596, 0.798
Total effect 0.863 (0.051) 0.764, 0.962 0.865 (0.051) 0.765, 0.965 0.853 (0.051) 0.753, 0.954 0.835 (0.051) 0.735, 0.936
Proportion of total effect mediated 0.169   0.168   0.164   0.165  
Ratio of indirect to direct effect 0.204   0.201   0.196   0.198  
  1. Model 1: unadjusted mediational model
  2. Model 2: adjusted for sociodemographics (age, sex, caste, religion, marital status, family size, employment status)
  3. Model 3: adjusted for sociodemographics + behavioral variables (tobacco use, alcohol use, sexual activity)
  4. Model 4: adjusted for sociodemographics + behavioral variables + educational variables (class hours, academic year, campus type, academic performance in previous year)
  5. b: unstandardized coefficient; BCa, Bias corrected and accelerated: 5000 bootstrap samples