临床实习医学生测量儿童体格指标的可信度研究

Study on reliability of children anthropometric indicators measured by medical students during clinical practice

目的评价临床实习学生测量儿童体格数据的可信度。方法采用方便抽样,收集实习学生入科培训后及出科时对婴幼儿头围、身长及顶臀长的测量数据,同步收集带教老师的复测数据,比较实习学生与带教老师的测量差异。采用测量者之间测量差异绝对值的均值(MAD)、关键差异值百分率等指标描述数据的可信度。结果入科时头围、身长及顶臀长的MAD分别为0.46、0.55及0.81cm,出科时分别为0.30、0.43及0.51cm,差异有统计学意义(P<0.05)。入科时头围、身长及顶臀长数据属于较好质量标准的关键差异值百分率分别为41.5%、58.0%及36.0%,出科时分别提高至53.5%、70.0%及59.0%,出科时头围、身长及顶臀长属于错误的数据分别为19.0%、10.0%及13.0%。结论临床实习学生测量儿童身长数据质量较好,头围及顶臀长测量值存在较大的误差。

Objective To evaluate the reliability of children anthropometric indicators measured by medical students in clinical practice.Methods The convenient sampling was adopted to collect the data of the head circumference（HC）,recumbent length（RL）and crown-rump length（CRL）of infants and young children measured by the students in clinical practice from entering-department training to exiting-department.The re-measured data by clinical teachers were simultaneously collected.The measurement difference were compared between the students and clinical teachers.The measurements reliability was described by using the indicators such as the mean absolute differences（MAD）,percentages of difference within a critical value（PDCV）and so on.ResultsMAD of HC,RL and CRL at entering-department were 0.46,0.55,0.81 cm respectively,which at exiting-department were 0.30,0.43,0.51 cm respectively,the difference were statistically significant（P〈0.05）.PDCV of HC,RL and CRL belonging to good quality standard at entering-department were 41.5%,58.0% and 36.0% respectively,which at exiting-department were increased to 53.5%,70.0%and 59.0%respectively.PDCV of HC,RL and CRL belonging to error data were 19.0%,10.0%and 13.0%respectively.Conclusion RL measured by medical students in clinical practice has good quality,while the bigger errors exist in the measurement values of HC and CRL.