患者参与的主观全面评定量表改良及在胃癌患者中的验证

目的 对患者参与的主观全面评定(Patient-generated Subjective Global Assessment,PG-SGA)量表进行改良,检验改良版PG-SGA的信效度及条目质量.方法 基于项目反应理论筛选出PG-SGA中质量不佳的条目,修订后形成改良版PG-SGA.2019年9月-2020年2月纳入江...

Modification and evaluation of a patient-generated subjective global assessment among gastric cancer patients

Objective To modify the patient-generated subjective global assessment(PG-SGA)scale,and to analyze the reliability,validity and item quality of the modified PG-SGA.Methods Modified items that need to be improved in PG-SGA based on item response analysis were screened out and the revised version of PG-SGA was formed.281 perioperative gastric cancer patients admitted to a level A tertiary hospital from September 2019 to February 2020 were selected.The weight of each item of the scale was determined by factor analysis;the cut-off values of the modified PG-SGA were divided according to the receiver operator characteristic curve.Finally,reliability and validity were evaluated,and item quality was analyzed again based on item response theory.Results The modified PG-SGA included 11 items,with a total score of 0 to 33.The cutoff value was 11 points.Reliability and validity analysis showed that the accuracy of the modified PG-SGA for nutritional assessment was higher than PG-SGA,and the Youden index was 0.844;the content validity index of the total scale was 0.910;4 common factors were extracted by exploratory analysis and the cumulative variance contribution rate was 83.494%;the Cronbach’αcoefficient of the total scale was 0.707.Analysis results of item response theory showed that the discrimination and difficulty parameters of the modified items were improved.Conclusion The modified PG-SGA is a reliable and valid scale,and the quality of items is improved.This scale can be utilized to conduct clinical nutritional assessment.