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Table 4 Total, direct and indirect effect of insomnia on QOL

From: Effects of insomnia and levels of depression and anxiety symptoms on quality of life in people with epilepsy

Effects on QOL Variables B SE P Bootstrap 95% CI
LL UL
Total effect (c) Insomnia - 1.08 0.11  < 0.001a   
Direct effect (c') Insomnia - 0.70 0.12  < 0.001a   
Indirect effect a × b - 0.37 0.08   - 0.54 - 0.23
  Insomnia (a) 0.31 0.04  < 0.001a   
  Depression symptom levels (b) - 1.22 0.21  < 0.001a   
  1. Unstandardized regression coefficients are reported. Bold data show statistical significance (P < 0.05,or Bootstrap 95% CI does not contain zero)
  2. LL Lower limit, UL Upper limit, CI Confidence interval, QOL Quality of life
  3. a Linear regression analysis