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Table 2 Body composition and physical activity according to ethnicity

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 Ethnicity, n (%) Chi2-test
Black South Asian White/Other Pearson-χ2; p-value
Age- and sex-adjusted BMI z-score
  < 5th percentile, ‘underweight’ 9 (1.8) 46 (8.9) 20 (2.3) 88.8; <.001***
 5th–85th percentile, ‘normal weight’ 275 (56.1) 353 (68.5) 599 (67.8)
 85th–95th percentile, ‘overweight’ 71 (14.5) 46 (8.9) 117 (13.2)
  > 95th percentile, ‘obese’ 135 (27.6) 70 (13.6) 148 (16.7)
ln(FMI) z-score
  < 5th percentile 23 (4.7) 8 (1.5) 25 (2.8) 39.7: <.001***
 5th–85th percentile 359 (73.3) 435 (84.5) 752 (85.1)
 85th–95th percentile 63 (12.8) 37 (7.2) 72 (8.1)
  > 95th percentile 45 (9.2) 35 (6.8) 35 (4.0)
FFMI z-score
  < 5th percentile 7 (1.4) 46 (8.9) 8 (0.9) 163.6; <.001***
 5th–85th percentile 365 (74.5) 448 (87.0) 751 (85.9)
 85th–95th percentile 62 (12.7) 15 (2.9) 90 (10.2)
  > 95th percentile 56 (11.4) 6 (1.2) 35 (4.0)
General Sports Frequency
 Never 5 (1.0) 4 (0.8) 17 (1.9) 19.5; .013*
 Less than weekly 21 (4.3) 21 (4.1) 31 (3.5)
 Weekly 112 (22.9) 118 (22.9) 246 (27.8)
 Most days 126 (25.7) 116 (22.5) 239 (27.0)
 Daily 226 (46.1) 256 (49.7) 351 (39.7)
Dominant mode of commuting
 Active 204 (41.6) 249 (48.3) 430 (48.6) 10.4; .108
 Passive 158 (32.3) 159 (30.9) 281 (31.8)
 Mixed 3 (0.6) 2 (0.4) 4 (0.5)
 Disagreement child-parent 125 (25.5) 105 (20.4) 169 (19.1)
  1. 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