Objective To verify the reliability and validity of the Chinese Infants Sleep Assessment Scales (ISAS), and to establish national norms and cut-off scores of poor sleep and abnormal sleep. Methods Using multistage random sampling, an investigation was conducted among 5 855 urban and rural infants' caregivers (including 2 943 infants aged 0 to 3 months and 2 912 infants aged 4 to 11 months) from 14 cities in 7 provinces. The internal consistency reliability, split-half reliability and confirmatory factor analysis were used to verify the reliability and validity of the scales. Then the percentile norms were established, and the total ISAS scores exceeding P85 and P95 were used as the cut-offs for identifying poor sleep and abnormal sleep. Results The Cronbach's α coefficients of ISAS (for infants aged 0 to 3 months) and ISAS (for infants aged 4 to 11 months) were 0.68 and 0.69, the split-half reliability were 0.78 and 0.75, respectively. The factor structure models were stable, which showed good reliability and validity. The age norm of ISAS (for infants aged 0 to 3 months) and the gender-specific age norm of ISAS (for infants aged 4 to 11 months) were established. The cut-off values of ISAS score for poor sleep were 31 and 32 in the two scales, respectively, which were 34 and 35 for abnormal sleep, respectively. Conclusions ISAS (for infants aged 0 to 3 months) and ISAS (for infants aged 4 to 11 months) have stable reliability and validity. Their norms and cut-offs can be used to quantitatively evaluate infants' sleep, in order to provide an quantitative basis for their promotion and application.
Key words
sleep /
scale /
validity /
reliability /
norm /
infant
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