Reliability analysisReliability reflects the stability and consistency of a scale.In our study, Cronbach’s α coefficients for the total scaleand for each domain were calculated, to evaluate the average consistency of the items. The higher the value is, thebetter the reliability, but if α is too high, it suggests that theitems are not simply related but overlap considerably. Inthe extreme case where α = 1,we should consider whethersome items are redundant and could be eliminated. Herewe chose 0.80 as the critical value; i.t., the measured resultscan be considered stable when α exceeds 0.80.