Table 4: The standardised and unstandardised coefficients of the direct, indirect and total effects of the path analysis model in 632 contemporary UK adolescents

From: Exploring the complex pathways among specific types of technology, self-reported sleep duration and body mass index in UK adolescents

Causal variableSleep duration (hours) Unst s.e. StBMI z-score Unst s.e. St
Computer use
 Direct effect−0.395** (0.119) −0.2890.147* (0.075) 0.147
 Indirect effect0.117* (0.038) 0.116
 Total effect 0.264* (0.010) 0.263
   
Mobile telephone use
 Direct effect−0.446** (0.138) −0.326−0.151 (0.086) −0.150
 Indirect effect0.132* (0.042) 0.131
 Total effect 0.019 (0.013) −0.019
   
TV viewing
 Direct effect0.221** (0.073) 0.220
 Indirect effect
   
Video gaming
 Direct effect0.315** (0.079) 0.313
 Indirect effect
   
Weekday sleep duration
 Direct effect −0.296** (0.031) −0.403
Intercept9.943** (0.243) 7.2771.740** (0.318) 1.730
  1. Abbreviations: BMI, body mass index; s.e., standard error; St, standardised coefficient; Unst, unstandardised coefficient
  2. *P<0.05; **P<0.01.