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Table 3 Cross-sectionala and prospectiveb associations of dietary intake (mediator), sedentary time (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: total sedentary time Uncorrected β (95% CI) Bias-corrected β (SE)
Cross-sectional mediators
 Discretionary food (freq/day) 0.27 (−0.03, 0.58) −0.01 (−0.15, 0.14) −0.42 (−0.77, −0.07)* 0.01 (−0.61, 0.62) 0.01 (−0.62, 0.69)
 SSB (freq/day) 0.27 (−0.05, 0.58) −0.16 (−0.38, 0.06) −0.04 (−0.29, 0.20) 0.07 (−0.33, 0.46) 0.07 (−0.31, 0.61)
 Takeaway food (freq/week) 0.27 (−0.05, 0.58) −0.06 (−0.30, 0.18) −0.04 (−0.26, 0.18) 0.02 (−0.13, 0.18) 0.02 (−0.36, 0.35)
Prospective mediators
 At baseline      
  Discretionary food (freq/day) 0.05 (−0.07, 0.17) 0.03 (−0.12, 0.17) 0.03 (−0.10, 0.17) 0.01 (−0.05, 0.07) 0.01 (−0.08, 0.15)
  SSB (freq/day) 0.05 (−0.06, 0.17) −0.15 (−0.37, 0.07) 0.02 (−0.07, 0.11) −0.03 (−0.17, 0.11) −0.03 (−0.22, 0.13)
  Takeaway food (freq/week) 0.05 (−0.07, 0.17) −0.05 (−0.30, 0.19) −0.03 (−0.12, 0.05) 0.02 (−0.08, 0.11) 0.02 (−0.12, 0.16)
 At follow-up      
  Discretionary food (freq/day) 0.05 (−0.07, 0.17) 0.08 (−0.09, 0.24) 0.01 (−0.11, 0.13) 0.01 (−0.05, 0.10) 0.01 (−0.16, 0.17)
  SSB (freq/day) 0.05 (−0.06, 0.17) −0.04 (−0.23, 0.15) 0.01 (−0.10, 0.12) −0.01 (−0.05, 0.04) −0.01 (−0.11, 0.09)
  Takeaway food (freq/week) 0.05 (−0.06, 0.17) 0.21 (−0.57, 0.47) −0.01 (−0.08, 0.07) −0.01 (−0.16, 0.15) −0.01 (−0.19, 0.17)
  1. aCross-sectional total effects (c-pathway) of total sedentary time and zBMI β = 0.27 (95% CI -0.04 to 0.58), adjusting for age, sex, mother’s education and pubertal status. bProspective total effects (c-pathway) of total sedentary time and zBMI β = 0.05 (95% CI -0.06 to 0.17), 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