Abstract: Objective To systematically evaluate the detection rate of social isolation among Chinese old people,provide reference for formulating social isolation prevention and control decisions for the elderly. Methods The CNKI,Wanfang Data,VIP,CBM,PubMed,Web of science,the Cochrane Library and Embase databases were searched by computer to collect research on the detection rate of social isolation in Chinese old people. The retrieval time limit was from the establishment of the database to July 2022. Two researchers independently screened the literature,extracted data and evaluated the quality of the literature included in the study,and Stata15.0 software was used for meta-analysis. Results Totally 15 studies were included,involving 10 557 cases. The meta-analysis showed that the detection rate of social isolation among Chinese old people was 26.0%（95%CI：21.3%-30.8%）. The subgroup analysis showed that the detection rate of family isolation（19.4%） was lower than that of friend isolation（31.9%）,slightly higher for men（29.3%） than for women（27.0%）,the detection rate of social isolation increased with age,the lower the education level,the higher the detection rate of social isolation,the detection rate of married group（28.2%） was lower than that in non-marriage group（43.5%）,higher in rural areas（28.3%） than in urban（26.0%）,higher in the east（27.2%） than in the centre （21.9%） and west（23.5%）,the detection rate in chronic patients（30.3%） was higher than that in people without chronic diseases（19.7%）,the detection rate in people with depression（61.6%） was higher than that in people without depression（19.3%）,and the differences were statistically significant（all P<0.01）. Conclusion The detection rate of social isolation among Chinese old people is high,and it is necessary to strengthen early screening for mental health in older people and take targeted intervention measures to reduce the risk of social isolation in older people.

Key words: Old people, Social isolation, Detection rate, Meta-analysis