The Detection Rate And Comparison Of Sarcopenia And Sarcopenic Obesity In Some Middle-aged And Elderly In Nanchang Area By Different Diagnostic Criteria

ObjectiveTo investigate the detection rate and comparison of sarcopenia in some middle-aged and elderly people in Nanchang area,and to explore diagnostic criteria for sareopenia and sarcopenic obesity based on the characteristic of Chinese senior citizen.MethodsA total of 707 people aged 19-88 years(363 males and 344 females)were selected from Jiangxi People’s Hospital physical examination center.They were divided into young people(19-40 years),middle-aged(41-59 years),and elderly(60years or older).Measure body composition:height and weight,and calculate body mass index(BMI).Appendicular skeletal muscle mass and body fat mass were measured by bioelectrical impedance method,and the appendicular skeletal muscle index and body fat percentage were calculated.The diagnosis of sarcopenic obesity:sarcopenia and obesity.Diagnosis of sarcopenia:(1)method 1:Baumgartner standard of diagnosis“appendicular skeletal muscle mass divided by body height squared in meters(appendicular skeletal muscle index)”two standard deviations below reference values from young,healthy individuals.(2)method 2:the diagnostic standard of the Asian Working Group for Sarcopenia recommended the appendicular skeletal muscle index in male≤7.0kg/m~2,female≤5.7 kg/m~2.Obesity was diagnosed by the following three methods:(1)the method 1:BMI≥28kg/m2;(2)the method 2:Body fat percentage method given by the WHO(≥25%in male,≥35%in female);(3)the method 3:Body fat percentage was greater than the 60th percentile of the study sample.Results1.PBF and fat index in male were lower than female,height,weight,BMI,muscle mass and ASMI in male were higher than female,the difference was statistically significant(P<0.001).Muscle mass and ASMI of men and women began to decline at 45 years old,and fell rapidly at about 65 years old.PBF and fat mass index remained relatively stable at 50-65 years old,and increased rapidly after65 years old in male.and they shown a slow rising trend in female.2.Baumgartner diagnostic criteria:the detection rates of middle-aged and elderly sarcopenia were 0.43%and 5.03%respectively,the difference was statistically significant(P=0.002);the detection rates of sarcopenia in middle-aged and elderly men and women were 2.54%and 3.54%,respectively,and there was no statistical difference(P>0.05).The diagnostic standard of The Asian Working Group for Sarcopenia:the detection rates of middle-aged and elderly sarcopenia were 15.52%and 35.23%,respectively(P<0.001);In the middle-aged and elderly people men and women,The detection rate of sarcopenia was 19.56%、34.25%,and the difference was statistically significant(P<0.001).The detection rate of sarcopenia in the elderly was higher than that in the middle-aged population,with a statistically significant difference(P<0.05).The detection rate of sarcopenia in the elderly was significantly higher than that in the Baumgartner diagnostic criteria by using the diagnostic standard of The Asian Working Group for Sarcopenia standard(P<0.001).3.Compared with non sarcopenia group,the sarcopenia group had high age,low body weight,BMI,muscle mass and appendicular skeletal muscle index(P<0.05).With The Asian Working Group for Sarcopenia standard,the body fat mass,PBF,and fat mass index in the female sarcopenia group were lower than that of the non sarcopenia group,and the PBF and fat mass index in the male sarcopenia group were lower than those in the non sarcopenia group,the difference was statistically significant(P<0.05).According to the Baumgartner standard,the body fat mass of the female sarcopenia group was lower than that of the non sarcopenia group,and the difference was statistically significant(P<0.05).4.Baumgartner diagnosis combining with the three obesity diagnosis methods:the detection rates of sarcopenic obesity in the middle-aged were 0%,0%,0.43%respectively,and in the elderly were 0%,1.68%and 1.34%,respectively(P>0.05).The diagnostic standard of The Asian Working Group for Sarcopenia combining with the three obesity diagnosis methods:the detection rates of sarcopenic obesity in the middle-aged were 0%、5.17%、5.60%;and in the elderly were 0.34%、15.77%、13.42%,There are statistical differences(P<0.05).5.ASMI combining with the WHO’s body fat percentage and ASMI combining with cut-off value 60.0%of the body fat percentage level in people of the same age:for the middle-aged,the consistency of sarcopenic obesity is common(Kappa=0.694);for the elderly,the consistency of sarcopenic obesity is good(Kappa=0.842 and Kappa=0.863)。Conclusion1.There is a difference in the prevalence of sarcopenia and sarcopenic obesity between different diagnostic criteria for sarcopenia and obesity.The detection rate of sarcopenia in the elderly was lower than that The Asian Working Group for Sarcopenia by using Baumgartner diagnostic criteria.2.Using BMI as the diagnostic criteria of obesity can not effectively diagnose sarcopenic obesity,especially in the elderly.3.ASMI combining with the WHO’s body fat percentage and ASMI combining with body fat percentage over the 60th percentile of the study sample,were consistent in the diagnosis of sarcopenia obesity in the elderly.and the consistency of the detection rate of middle-aged sarcopenic obesity was general.