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Table 3 Reliability indices (Cronbach’s α coefficient, intra-class correlation coefficient, and split-half reliability) for the Chi-MPCOSQ and domains

From: Psychometric properties of the Chinese version of the modified polycystic ovary syndrome health-related quality-of-life questionnaire

Index

Chi-MPCOSQ

Domains

Hirsutism

Acne

Weight

Infertility

Emotional disturbance

Menstrual symptoms

Menstrual predictability

Cronbach’s α coefficienta

0.878

0.887

0.931

0.936

0.884

0.949

0.688

0.830

Intra-class correlation coefficientb

0.892

0.889

0.890

0.916

0.828

0.902

0.898

0.890

Split-half reliabilityc

0.938

       
  1. aCronbach’s α coefficient was used to evaluate internal consistency reliability. A score ≥ 0.70 was regarded as acceptable
  2. bIntra-class correlation coefficient was used to evaluate test-retest reliability. A score of > 0.60 was regarded as high agreement
  3. cSplit-half reliability ≥0.70 was regarded as acceptable
  4. Abbreviations: Chi-MPCOSQ, Chinese version of the modified polycystic ovary syndrome health-related quality-of-life questionnaire; PCOS; polycystic ovary syndrome