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Table 1 Means, standard deviations, percent floor and ceiling effects, and Cronbach's α for the Iranian version of PedsQL™ 4.0 generic core scales (n = 525)

From: Validity and reliability of the Iranian version of the Pediatric Quality of Life Inventory™ 4.0 (PedsQL™) Generic Core Scales in children

  Mean SD Skewness Kurtosis Percent
floor
Percent
ceiling
Cronbach's α
Child self-report        
Total score 83.99 11.90 -1.26 1.76 0 2.9 0.84
   Physical functioning 85.29 13.95 -1.44 4.32 0 5.5 0.70
   Emotional functioning 80.55 16.75 -0.92 0.54 0 5.9 0.64
   Social functioning 86.88 16.01 -1.44 3.18 0 37.7 0.70
   School functioning 83.26 14.88 -1.36 3.35 0.2 19.6 0.60
Parent proxy-report        
Total score 76.75 13.45 -0.31 -0.15 0 3.0 0.88
   Physical functioning 77.52 18.48 -0.74 0.47 0 17.7 0.83
   Emotional functioning 70.95 17.37 -0.22 -0.74 0 5.7 0.70
   Social functioning 80.77 17.89 -0.83 0.10 0 25.3 0.74
   School functioning 77.76 15.77 -0.47 0.19 0.2 13.9 0.63
  1. Floor or ceiling effects are considered to be present if more than 15% of respondents achieve the lowest or highest possible score, respectively.