Objective To analyze the prevalence and risk factors of 3 types of skin injuries in the elderly through multicenter cross-sectional survey,so as to provide bases for formulating prevention strategies for skin injuries in the elderly. Methods On March 31,2021,1 067 nurses from 50 hospitals in 16 provinces,2 autonomous regions and 2 municipalities included inpatients over 60 years old and inspected their skin from head to toes to identify pressure injury（PI）,incontinence-associated dermatitis（IAD） and skin tear（ST）,and meanwhile collected demographic,healthcare condition and PI risk assessment data. Statistical software was used for descriptive analysis,Pearson correlation analysis and logistic regression analysis. Results Totally,14 470 cases were obtained. The average age was（73.35±8.90） years old. The total prevalence of skin injuries was 6.69%,and the prevalence of PI,IAD and ST was 3.91%,1.89% and 0.89%,respectively. Logistic regression analysis showed that the risk of PI,inability of self-care,hypoproteinemia and anemia,comorbidity over 2 chronic diseases and ≥70 years old were the independent risk factors of PI in the elderly. The risk of PI,inability of self-care,hypoproteinemia,comorbidity over 2 chronic diseases,length of hospital stay≥8 days and the age of over 80 years were the independent risk factors of IAD in the elderly. The risk of PI and hypoproteinemia were independent risk factors of ST in the elderly. Conclusion Skin injuries of the hospitalized elderly are the result of multiple factors,while PI and IAD are the most typical ones,and the risk factors of different types of skin injuries are also different. When formulating prevention strategies,we should not only pay attention to the independent role of risk factors,but also consider the combined role of risk factors,take comprehensive preventive measures to improve the prevention effect.

Objective To investigate the current status and influencing factors of diet self-efficacy among the elderly in nursing homes. Methods We used the convenience sampling method to select 350 older adults in 3 nursing homes in Yinchuan from August 2020 to December， using a General Information Questionnaire，Nutrition Knowledge and Attitude Questionnaire，Micro Nutrition Assessment Scale，and Diet Self-Efficacy Scale to conduct a questionnaire survey. The random forest model combined with multiple linear regression was used to analyze the influencing factors of diet self-efficacy. Results The total score of diet self-efficacy of the elderly in nursing homes was（54.98±8.04） points，and the scoring rate was 68.6%，with an average score of（3.43±0.50） points for all items. The random forest sorting showed that the top 5 factors affecting diet self-efficacy were nutrition attitude， exercise time， nutrition knowledge，nutrition status，and highest education. The multiple linear regression analysis results showed that nutrition knowledge， nutrition attitude，nutrition status，exercise time，education，and previous occupation were the influencing factors of diet self-efficacy，which were similar to the random forest results. Conclusion The diet self-efficacy of the elderly in nursing homes is moderate. Nutrition attitudes，knowledge，nutrition status， exercise time，and highest education are essential factors affecting diet self-efficacy. Nurses should comprehensively consider the above factors to develop elderly nursing plans to promote their diet self-management confidence and ability， thereby ameliorating their nutritional status.