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Table 2 Descriptive characteristics of the sample (N = 10,172)

From: Associations between symptoms of eating disturbance and frequency of physical activity in a non-clinical, population-based sample of adolescents

  Girls (n = 5371) Boys (n = 4801) Cohens d p-value
Sociodemographic variables and BMI
 Sex, N (%) 5371 (52.8) 4801 (47.2) <.001
 Age, M (SD) 17.45 (0.85) 17.41 (0.84) .04 .039
 Perceived family economic resources, N (%)    <.011
  - Poorer financial circumstances 413 (7.9) 289 (6.2)   
  - Approximately like most others 3670 (70.1) 2968 (64.0)   
  - Better financial circumstances 1150 (22.0) 1378 (29.7)   
 Mother’s education, N (%)a    .157
  - Primary school 1664 (40.3) 1470 (42.4)   
  - Secondary school 447 (10.8) 336 (9.7)   
  - University / college 2021 (48.9) 1663 (47.9)   
 Father’s education, N (%)b    .272
  - Primary school 1786 (45.8) 1670 (47.3)   
  - Secondary school 425 (10.9) 367 (10.4)   
  - University / college 1688 (43.3) 1496 (42.3)   
 Body mass index, M (SD) 21.96 (3.58) 22.58 (3.56) −.17 <.001
Physical activity
 Mean number of days per week, M (SD) 2.88 (0.03) 3.46 (0.03) −.28 <.001
Eating disturbance
 EDS-5 total score, M (SD) 3.02 (2.49) 1.32 (1.64) .80 <.001
  1. aIncludes only 7.601 individuals, due to n = 2571 having answered that they don’t know
  2. bIncludes only 7.432 individuals, due to n = 2740 having answered that they don’t know