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Table 1 Baseline characteristics of study participants by sex (Japan, 2002–2007) (n=1431)

From: Association between distorted body image and changes in weight status among normal weight preadolescents in Japan: a population-based cohort study

Variable Boys Girls P-value
(n=723) (n=708)
Age (years), mean (SD) 9.4 (0.5) 9.4 (0.5) 0.961
Height (cm), mean (SD) 134.8 (5.4) 134.8 (6.2) 0.968
Weight (kg), mean (SD) 30.3 (3.7) 29.9 (4.1) 0.129
BMI (kg/m2), mean (SD) 16.6 (1.3) 16.4 (1.3) 0.004
Seif-perceived weight status, n (%)    
 Thin 207 (28.6) 151 (21.3) 0.001
 Normal 480 (66.4) 498 (70.3)
 Heavy 36 (5.0) 59 (8.3)
  1. The unpaired t-test and chi-square test were used to compare characteristics between sexes
  2. SD standard deviation, BMI body mass index