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Table 2 Inter-rater reliability: analyses of covariance for repeated measures (ANCOVA); country-specific

From: Parent–child-agreement on health-related quality of life and its determinants in patients born with Esophageal Atresia: a Swedish–German cross-sectional study

   Parent-report Child-report ICC [95% CI] g Friedman-Test
Dyads
n
M (SD) α M (SD) α χ2 df p
GERMANY PedsQL
 Physical 23 80.84 (20.63) .86 84.65 (18.89) .87 .87 [.69, .95]** .286 1 .59
 Emotional 21a 79.76 (23.05) .90 86.43 (17.90) .84 .82 [.55, .93]** 2.571 1 .11
 Social 23 80.87 (21.57) .82 83.62 (16.84) .78 .73 [.37, .89]** 2.579 1 .11
 School 22b 69.77 (19.67) .78 75.68 (19.60) .84 .83 [.60, .93]** 4.765 1 .03
 Psychosocial 21a 77.94 (17.46) .90 82.46 (14.28) .88 .79 [.47, .91]** 2.000 1 .16
 Total 21a 79.32 (16.93) .93 83.46 (14.08) .92 .79 [.49, .92]** 1.316 1 .25
SWEDEN
PedsQL
 Physical 32c 82.32 (23.04) .91 84.67 (21.64) .92 .95 [.90, .98]** 1.190 1 .28
 Emotional 31d 81.67 (22.34) .90 84.03 (20.47) .87 .90 [.80, .95]** .727 1 .39
 Social 31d 88.06 (17.64) .85 88.55 (18.45) .88 .90 [.79, .95]** .692 1 .41
 School 32c 77.93 (20.66) .85 80.31 (19.30) .83 .95 [.90, .98]** 1.636 1 .20
 Psychosocial 31d 82.92 (17.56) .92 84.62 (16.79) .93 .95 [.90, .98]** .667 1 .41
 Total 31d 82.93 (18.55) .95 84.91 (17.14) .96 .97 [.93, .98]** 1.960 1 .16
GERMANY
EA-QOL
 Eating 21a 75.85 (20.36) .81 72.64 (19.63) .72 .89 [.72, .95]** .222 1 .64
 Body 20e 84.50 (20.38) .87 85.00 (21.64) .86 .61 [ .01, .85]* .333 1 .56
 Social 21a 79.65 (19.80) .84 76.70 (21.21) .79 .89 [.74, .96]** .692 1 .41
 Health 20e 84.38 (16.78) .64 80.94 (23.51) .86 .78 [.46, .91]** .077 1 .78
 Total 20e 80.65 (16.69) .92 78.25 (17.73) .88 .90 [.76, .96]** .250 1 .62
SWEDEN
EA-QOL
 Eating 36f 73.61 (21.36) .84 71.44 (19.75) .76 .93 [.97, .97]** 3.846 1 .05
 Body 38a 80.00 (19.59) .82 80.39 (20.94) .81 .95 [.91, .98]** .182 1 .67
 Social 38a 78.38 (16.71) .74 74.53 (17.30) .74 .86 [.73, .93]** 1.960 1 .16
 Health 38a 81.41 (17.28) .70 80.26 (19.25) .76 .92 [.85, .96]** .800 1 .37
 Total 36f 78.18 (15.32) .91 76.09 (15.55) .89 .93 [.86, .97]** 2.613 1 .11
  1. M = Mean, SD = Standard deviation, α = Cronbach’s alpha, ICC = Intraclass correlation coefficients, CI = Confidence interval, χ2 = Chi-Square, df = degrees of freedom, p = p-value (significance)
  2. a 2 missing dyads
  3. b 1 missing dyad
  4. c 8 missing dyads
  5. d 9 missing dyads
  6. e 3 missing dyads
  7. f 4 missing dyads
  8. g Intraclass correlation coefficients reference values: ICC < .40 = poor agreement, ICC between .41 and .60 = moderate agreement, ICC between .61 and .80 = good agreement, ICC > .81 = excellent agreement [25]. *≤.05; **≤.01