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Table 1 Characteristics of the study samples

From: Psychometric analysis of the Brazilian-version Kidscreen-27 questionnaire

Variables Pilot in 2016 Baseline in 2017 p value
(n = 210) (n = 816)
n (%) n (%)
Sex    0.151*
 Boys 111 (52.9) 386 (47.3)  
 Girls 99 (47.1) 430 (52.7)  
Age mean (years)a 13.7 (1.0) 13.1 (1.1)  < 0.001**
School year    0.009*
 7th year 52 (24.8) 291 (35.9)  
 8th year 76 (36.2) 258 (31.8)  
 9th year 82 (39.0) 262 (32.3)  
HRQoLb Mean (SD) Mean (SD) p value
Physical well-being 43.6 (10.3) 44.0 (9.8) 0.693**
Psychological well-being 45.0 (10.6) 45.7 (11.5) 0.409**
Autonomy and parent relation 46.4 (9.9) 46.8 (9.1) 0.558**
Social support and peers 47.6 (10.7) 49.8 (10.3) 0.007**
School environment 46.7 (7.9) 48.6 (8.9) 0.054**
  1. *Chi-square test; **Student's t test
  2. aVariable with 1 non-response at baseline
  3. bT-scores with a mean of 50 and standard deviation of 10