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Table 3 Effect estimates of effects of internet addiction on depressive symptoms in undergraduate students mediated via sleep quality

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 0.064 (0.008) 0.049, 0.081 0.063 (0.008) 0.048, 0.080 0.060 (0.008) 0.046, 0.078 0.059 (0.008) 0.044, 0.076
Direct effect 0.130 (0.014) 0.101, 0.158 0.134 (0.015) 0.106, 0.163 0.133 (0.015) 0.104, 0.161 0.132 (0.015) 0.103, 0.161
Total effect 0.194 (0.015) 0.164, 0.223 0.197 (0.015) 0.167, 0.227 0.193 (0.015) 0.163, 0.223 0.191 (0.015) 0.161, 0.221
Proportion of total effect mediated 0.330   0.320   0.311   0.309  
Ratio of indirect to direct effect 0.493   0.469   0.453   0.446  
  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