Objective To analyze the reliability and validity of Sub-health Measurement Scale Version 1.0(SHMS V1.0) in measuring the sub-health status of urban residents in Anhui Province.Methods We carried out this study from November 2016 to March 2017.The 1 150 urban residents(selected based on male to female ratio of 1∶1) enrolled in accordance with the inclusion and exclusion criteria of the study,were from a stratified random sample of 3 prefecture-level cities of Anhui Province(400 from Hefei,400 from Tongling,and 350 from Fuyang).We used a self-designed Sub-health Questionnaire(consisting of Urban Resident Demographic Questionnaire and SHMS V1.0) for collecting the data about sub-health.Psychometric properties of SHMS V1.0 including the reliability(internal consistency reliability and split-half reliability),content validity(item-dimension correlation,correlation between dimension and subscale,Cronbach's ɑ for each dimension,dimension-total correlation) and structural validity(exploratory factor analysis and confirmatory factor analysis) were assessed.Results A total of 1 078(93.74%) residents returned responsive questionnaires.The Cronbach's ɑ for SHMS V1.0,physiological sub-health scale(PS),mental sub-health subscale(MS),and social sub-health subscale(SS) was 0.928,0.847,0.875 and 0.857,respectively.The Spearman-Brown coefficients for them were 0.847,0.749,0.809 and 0.742,respectively.The Guttman coefficients for them were 0.847,0.745,0.807 and 0.731,respectively.The item-to-own-dimension correlation coefficients of SHMS V1.0 ranged from 0.711 to 0.901(P<0.05).The correlation coefficients of dimension to its corresponding subscale were 0.642-0.906(P<0.05).The Cronbach 's ɑ of each dimension is greater than the correlation coefficients of this dimension with other dimensions or the SHMS V1.0(P<0.05).The KMO of SHMS V1.0=0.901,the Bartlett's spherical test χ2=8 753.858,and the degrees of freedom was 595(P<0.001),indicating that it was suitable for factor analysis.Totaled 8 common factors were extracted from exploratory factor analysis,explaining 63.319% of the total variance,and each item had a large loading value on one of the common factors(>0.400).Confirmatory factor analysis confirmed that the fitting effect of the final model was ideal:the degrees of freedom ratio(CMIN/DF)=2.009,the normed fit index(NFI)=0.858,the relative fit index(RFI)=0.835,the incremental fit index(IFI)=0.907,tucker-lewis index(TLI)=0.891,comparative fit index(CFI)=0.906,root mean square error of approximation(RMSEA)=0.055.Conclusion SHMS V1.0 could accurately,reliably and sensitively measure the sub-health status of Anhui urban residents,demonstrating its good reliability and validity,so it can be used for further study of the status and associated factors of sub-health among this population.