Objective To investigate the status and influencing factors of dysphagia in elderly patients with chronic obstructive pulmonary disease（COPD）. Methods A total of 1 268 elderly patients with COPD hospitalized in the respiratory department of 13 general hospitals in Ningxia were selected by convenience sampling method from April 2019 to August 2020. Patients were investigated by the general information questionnaire，the Water Swallowing Test，Modified Medical Research Council Dyspnea Scale，Activities of Daily Living，the Geriatric Depression Scale，the Mini Nutritional Assessment-Short Form，COPD Assessment Test Scale，the FRAIL debilitation assessment scale. Logistic regression analysis was performed to analyze the influencing factors of dysphagia in COPD patients with statistically significant variables. Results The incidence of dysphagia in elderly COPD patients was 20.39%. Logistic regression analysis showed that smoking status，tooth loss，feeding attention，feeding position，PaCO₂，dyspnea，nutritional status and COPD severity were the influential factors of dysphagia（P<0.05）. Conclusion The incidence of dysphagia in elderly COPD patients is higher. COPD patients with severe disease，high degree of dyspnea，high PaCO₂，long-term smoking，number of missing teeth≥6，malnutrition，not paying attention to eating，and semi-recumbent position have a higher risk of dysphagia. Clinical medical staff can formulate relevant intervention measures according to the influencing factors to prevent the occurrence of dysphagia.

Objective To evaluate the effect of discharge preparation service in patients with chronic obstructive pulmonary disease (COPD) through meta-analysis. Methods A systematic search of PubMed,Cochrane Library,Web of Science,CINAHL,Embase,OVID,CNKI,CBM and Wanfang database was carried out to collect randomized controlled trials(RCTs) on discharge preparation service for COPD patients from inception to March 2021. Literature screening,information extraction and quality evaluation were conducted by 2 reviewers,and RevMan 5.2 software was adopted for meta-analysis. Results A total of 14 RCTs with 2 023 patients were finally included. The results showed that discharge preparation services reduced readmission rates [OR=0.62,95%CI(0.48,0.80),Z=3.69,P<0.001],the number of readmissions [MD=-0.57,95%CI(-0.96,-0.19),Z=2.94,P=0.003] and length of stay [MD=-1.77,95%CI (-2.78,-0.76),Z=3.42,P<0.001],and improved MMRC [MD=-0.39,95%CI(-0.70,-0.09),Z=2.56,P=0.010]. There was no significant difference in quality of life by the SGRQ [MD=-3.27,95%CI(-7.57,1.03),Z=1.49,P=0.140]. The quality of life was improved by the SOLDQ [MD=49.38,95%CI(43.11,55.65),Z=15.43,P<0.001]. There was no significant difference in reducing mortality [OR=0.90,95%CI(0.61,1.34),Z=0.50,P=0.620]. Conclusion Discharge pre-paration service can effectively reduce the readmission rate,the number of readmissions and length of stay,and improve MMRC in patients with COPD,but the impact on mortality and quality of life is still uncertain,and high-quality research is still needed for further demonstration.