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Table 4 Test–retest reliability of the Japanese version of the PedsQL Infant Scales

From: Reliability and validity of the Japanese version of the Pediatric Quality of Life Inventory Infant Scales

  N = 52
n Mean SD 95%CI ta P value a ICCb P valueb
Upper Lower
Infants aged 1–12 months
Physical functioning 23 1.93 18.25 − 5.96 9.82 0.51 0.62 0.71  < 0.01
Physical symptoms 23 0.25 9.97 − 4.06 4.56 0.12 0.90 0.85  < 0.01
Emotional functioning 23 − 1.99 11.12 − 6.80 2.82 − 0.86 0.40 0.73  < 0.01
Social functioning 23 2.72 14.08 − 3.37 8.81 0.93 0.36 0.73  < 0.01
Cognitive functioning 23 − 3.26 11.44 − 8.21 1.69 − 1.37 0.19 0.70  < 0.01
Physical health summary 23 0.73 11.11 − 4.07 5.53 0.32 0.76 0.84  < 0.01
Psychosocial health summary 23 − 3.28 7.65 − 6.59 0.02 − 2.06 0.05 0.80  < 0.01
Total 23 -0.25 8.79 − 4.05 3.55 − 0.14 0.89 0.85  < 0.01
Infants aged 13–24 months
Physical functioning 29 0.38 14.40 − 5.10 5.86 0.14 0.89 0.49  < 0.01
Physical symptoms 28 1.07 16.81 − 5.45 7.59 0.34 0.74 0.65  < 0.01
Emotional functioning 29 − 2.19 9.10 − 5.65 1.27 − 1.30 0.21 0.86  < 0.01
Social functioning 28 0.00 8.50 − 3.30 3.30 0.00 1.00 0.56  < 0.01
Cognitive functioning 27 0.34 6.66 − 2.30 2.97 0.26 0.79 0.77  < 0.01
Physical health summary 28 0.39 13.59 − 4.88 5.67 0.15 0.88 0.66  < 0.01
Psychosocial health summary 29 − 1.28 6.35 − 3.69 1.14 − 1.08 0.29 0.85  < 0.01
Total 29 -0.32 7.94 − 3.34 2.70 − 0.22 0.83 0.81  < 0.01
  1. SD, standard deviation
  2. aPaired t test
  3. bIntra-class correlation coefficients between the initial test and retest scores in a one-way random effects model