改良四等级功能活动评分法在评价胸外科病人术后活动能力中的信效度研究

Study on the reliability and validity of modified four-grade functional activity score in the evaluation of postoperative mobility ability of patients in thoracic surgery

目的:探讨改良四等级功能活动评分法在评价胸外科病人术后活动能力中的适用性。方法:随机选取在胸外科进行手术治疗的70例病人为研究对象,均在术后进行改良的四等级功能活动评分。对其评价结果进行项目分析(包括条目鉴别度检验和条目同质性检验)、信度分析、效度分析。条目鉴别度检验,将70例病人的改良四等级功能活动评分法进行降序排序,以前后25%的病人得分作为高低临界值的分割点,前25%为高分组,后25%分为低分组,比较高分组、低分组各条目的差异;条目同质性检验,以各条目得分与改良四等级功能活动评分总分之间的Pearson相关系数检验条目同质性。采用Cronbach′sα系数进行量表的信度分析。采用内容效度指数(CVI)评价量表的内容效度。结果:项目分析结果显示,高分组与低分组在各条目中的差异均有统计学意义(P<0.01);各条目评分与量表总分均呈正相关关系(P<0.05)。信度分析结果显示,量表的Cronbach′sα系数为0.934。效度分析结果显示,量表各条目的条目水平的CVI、量表水平的全体一致性CVI均为1.0。结论:改良四等级功能活动评分法在胸外科病人术后活动能力评价中的适用性较好。

Objective:To explore the applicability of modified four-grade functional activity score in evaluating postoperative mobility ability of patients in thoracic surgery.Methods:Seventy patients who underwent thoracic surgery were randomly selected as the research objects,and given modified four-grade functional activity score after surgery.The evaluation results were analyzed by item analysis(including item discrimination test and item homogeneity test),reliability analysis and validity analysis.In the item discrimination test,the scores of 70 patients were sorted in descending order.The scores of the first 25%of patients and the last 25%of patients were used as the cut-off points of high value and low value,respectively.The first 25%of patients were set as high score group and the last 25%of patients as low score group,and the differences of each item between the two groups were compared.The homogeneity of items was tested by Pearson correlation coefficient between the scores of each item and the total score of the modified four-grade functional activity score.The reliability of the scale was analyzed using Cronbach′sαcoefficient.The content validity of the scale was evaluated by content validity index(CVI).Results:The results of item analysis showed that there were significant differences in each item between high score group and low score group(P<0.01),and the score of each item was positively correlated with the total score of the scale(P<0.05).The results of reliability analysis indicated that the Cronbach′sαcoefficient of the scale was 0.934.The results of validity analysis displayed that the CVI of each item at item level and the overall consistency CVI of each item at scale level were 1.0.Conclusions:The modified four-grade functional activity score has good applicability in the evaluation of postoperative mobility ability of patients in thoracic surgery.