Skip to main content

Table 3 The relationship between measures of body mass index and body composition and frequency of sports participation

From: Associations of extracurricular physical activity patterns and body composition components in a multi-ethnic population of UK children (the Size and Lung Function in Children study): a multilevel modelling analysis

Variable BMI z-score percentile categories ln(FMI) z-score percentile categories FFMI z-score percentile categories
Wald Chi-Squared = 77.92; p < .001 Wald Chi-Squared = 85.47; p < .001 Wald Chi-Squared = 85.47; p < .001
Level 1 O.R. [95% C.I.] p-value O.R. [95% C.I.] p-value O.R. [95% C.I.] p-value
Sports Frequency (reference: daily)
 Never 2.222 [0.977–5.052] .057 2.485 [0.961–6.429] .060 1.816 [0.619–5.328] .277
 Less than weekly 0.435 [0.236–0.802] .008** 0.466 [0.210–1.341] .061 0.455 [0.214–0.969] .041**
 Weekly 0.970 [0.750–1.256] .819 0.967 [0.697–1.341] .841 0.945 [0.676–1.321] .741
 Most days 0.911 [0.707–1.174] .471 0.998 [0.728–1.369] .990 0.832 [0.596–1.162] .281
Sex (reference: female)
 Male 0.843 [0.687–1.035] .102 0.975 [0.754–1.261] .846 1.063 [0.815–1.386] .654
Age at test 1.110 [1.041–1.183] .001** 1.005 [0.928–1.089] .903 1.030 [0.947–1.120] .486
Ethnicity (reference: white/other)
 Black 1.563 [1.183–2.066] .002** 1.809 [1.268–2.580] .001** 1.612 [1.130–2.300] .008**
 South Asian 0.607 [0.452–0.815] .001** 1.306 [0.920–1.854] .136 0.253 [0.157–0.408] <.001***
Family Affluence Scale (reference: low)
 Moderate 1.209 [0.816–1.792] .344 1.344 [0.818–2.209] .244 1.491 [0.892–2.492] .127
 High 1.107 [0.692–1.771] .671 1.728 [0.959–3.112] .069 1.940 [1.052–3.574] .034*
Free school lunches (reference: no)
 Yes 1.426 [1.087–1.870] .010* 1.681 [1.211–2.334] .002** 1.582 [1.114–2.247] .010*
Cars owned (reference: 0)
 1 0.988 [0.749–1.305] .934 1.040 [0.737–1.466] .824 0.987 [0.690–1.411] .941
 2 1.052 [0.731–1.513] .787 0.872 [0.550–1.381] .559 0.674 [0.414–1.097] .113
Multiple Deprivation Index (reference: low)
 Intermediate 1.275 [0.914–1.780] .153 1.116 [0.735–1.696] .607 1.318 [0.846–2.053] .222
 High 1.385 [0.979–1.960] .066 1.384 [0.910–2.103] .129 1.314 [0.828–2.085] .246
Level 2: Variance on School Level 0.053 [0.012–0.227]   0.048 [0.008–0.298]   0.112 [0.026–0.479]  
  1. O.R. Odds Ratio, C.I. Confidence Interval, BMI Body Mass Index, FMI Fat Mass Index, FFMI Fat-Free Mass Index
  2. *: p < .05; **: p < .01; ***: p < .001
  3. Significant associations (p < .05) on the first level of the multilevel model are in bold