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Table 4 Cross-sectionala and prospectiveb associations of dietary intake (mediator), sedentary bouts (independent) and zBMI (outcome) (n = 140)

From: Cross-sectional and prospective mediating effects of dietary intake on the relationship between sedentary behaviour and body mass index in adolescents

Outcome: zBMI c`-coefficient (direct) β (95% CI) a-coefficient β (95% CI) b-coefficient β (95% CI) ab/indirect (mediated/indirect)c
Independent: sedentary bouts Uncorrected β (95% CI) Bias-corrected β (SE)
Cross-sectional mediators
 Discretionary food (freq/day) 0.12 (−0.36, 0.61) −0.08 (−0.31, 0.15) −0.42 (−0.77, −0.06)* 0.32 (−0.67, 1.32) 0.32 (−0.55, 1.37)
 SSB (freq/day) 0.14 (−0.36, 0.64) −0.36 (−0.69, −0.02)* −0.06 (−0.30, 0.19) 0.20 (−0.71, 1.11) 0.20 (−0.68, 0.12)
 Takeaway food (freq/week) 0.16 (−0.33, 0.65) 0.03 (−0.34, 0.41) −0.05 (−0.28, 0.18) −0.02 (−0.21, 0.18) −0.02 (−0.62, 0.34)
Prospective mediators
 At baseline      
  Discretionary food (freq/day) 0.08 (−0.10, 0.26) −0.06 (−0.29, 0.17) 0.04 (−0.10, 0.17) −0.02 (−0.14, 0.10) −0.02 (−0.24, 0.14)
  SSB (freq/day) 0.09 (−0.09, 0.27) −0.36 (−0.70, −0.02)* 0.02 (−0.07, 0.11) −0.09 (−0.42, 0.24) −0.09 (−0.52, 0.24)
  Takeaway food (freq/week) 0.08 (−0.10, 0.26) 0.04 (−0.34, 0.41) −0.04 (−0.12, 0.04) −0.01 (−0.15, 0.13) −0.01 (−0.27, 0.16)
 At follow-up      
  Discretionary food (freq/day) 0.08 (−0.10, 0.26) −0.08 (−0.34, 0.17) 0.02 (−0.10, 0.14) −0.02 (−0.12, 0.09) −0.02 (−0.28, 0.16)
  SSB (freq/day) 0.08 (−0.10, 0.26) 0.11 (−0.18, 0.40) 0.01 (−0.010, 0.11) 0.01 (−0.11, 0.12) 0.01 (−0.19, 0.20)
  Takeaway food (freq/week) 0.08 (−0.10, 0.26) 0.06 (−0.35, 0.48) −0.01 (−0.08, 0.07) −0.01 (−0.05, 0.04) −0.01 (0.18, 0.17)
  1. aCross-sectional total effects (c-pathway) of average sedentary bout and zBMI β = 0.16 (95% CI -0.33 to 0.65), adjusting for age, sex, mother’s education and pubertal status. b Prospective total effects (c-pathway) of average sedentary bout and zBMI β = 0.08 (95% CI -0.10 to 0.26), adjusting for age, sex, mother’s education, pubertal status and zBMI at baseline. cDue to the small units of measure, the indirect effects have been multiplied by 10. Significant *p < 0.05. SSB: sugar-sweetened beverages; zBMI: body mass index z-score; freq: frequency