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All internal consistency reliability coefficients for PedsQL™ cardiac module scales exceeded the minimum reliability standard for group comparisons, ranging from 0.72 to 0.96, except in the young child 5- to 7-year-old age group.
The scales exceeded the minimum reliability standard of 0.70 [ 26].
All parent-proxy report scales, except for one, exceeded the minimum reliability standard of 0.70, and four child self-report scales exceeded the minimum reliability standard.
The internal consistency, as measured by Cronbach's alpha coefficients, exceeded the minimum reliability standard of 0.70.
Internal consistency reliability approached or exceeded the minimum reliability standard of α = 0.7 (child α = 0.81, parent α = 0.86).
Cronbach's alpha coefficients for child self-report and parent proxy-report all exceeded the minimum reliability standard of.70.
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In general the questionnaire received well and all domains met the minimum reliability standards (Cronbach's alpha and intra-class correlation > 0.7), except for social relationships (alpha = 0.55).
Arbitrary minimum reliability standards have been recommended by various authors, such as an ICC over 0.70 for questionnaires to be used in group comparison studies [ 12].
The majority of the child self-report scales across the age subgroups, including for children as young as 5 years, exceeded the minimum internal consistency reliability standard of 0.70 required for group comparisons, while the Total Scale Scores across the age subgroups approached or exceeded the reliability criterion of 0.90 recommended for analyzing individual patient scale scores.
The majority of the parent proxy-report scales across the age subgroups exceeded the minimum internal consistency reliability standard of 0.70 required for group comparisons, while the Total Scale Scores across the age subgroups approached or exceeded the reliability criterion of 0.90 recommended for analyzing individual patient scale scores.
Each of the NHP22 scales bordered on the minimum item internal-consistency reliability standard of 0.90 recommended when individual decisions are made with respect to specific test scores [ 3].
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