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Table 2 Linear mixed effect models with Total difficulties score as the dependent variable

From: The association between physical fitness and mental health in Norwegian adolescents

Model Independent variable B (95% CI) p
1 Body mass index .058 (−.027 to .142) .184
2 Sit-ups −.088 (−.156 to −.020) .011
3 Standing broad jump −.008 (−.018 to .003) .147
4 Handgrip strength −.024 (−.062 to .013) .206
5 Muscular strength z score −.458 (−.810 to −.109) .010
6 Cardiorespiratory fitness −.006 (−.009 to −.003) <.001
7 – Fully adjusted model Intercept 18.8 (14.6 to 23.0) <.001
Body mass index .003 (−.086 to .093) .941
Muscular strength z score −.033 (−.450 to .381) .873
Cardiorespiratory fitness −.006 (−.009 to −.002) .001
  1. Note. 29 school clusters were included as random effects in all models; all models were controlled for sex, socioeconomic status, and birthplace. B Unstandardized regressioncoefficient, CI Confidence interval, p Significance level