OBJECTIVE To understand the incidence of hospital acquired infection,the risk factors and the distribution of the pathogenic bacteria in elder patients in Cadre Unit and explore the curing measuresMETHODS The clinical data of 784 elder inpatients above 60 years old were retrospectively investigated.RESULTS Among 76 infected inpatients,the rate of infection was 9.7%.The main site of hospital acquired infection weas respiratory tract(47.4%)and urinary tract(21.1%).The main flora was gram-negative bacilli(52.9%)and then gram- positive cocci(30.5%).The risk factors included age,the time of stay in hospital,aggressive procedures,broad- spectrum antibiotic and underlying disease,etc.CONCLUSIONS The elder in-patients were the susceptible population hospital acquired infection.Curing underlying diseases,reducing the risk factors,increasing body immunity are very useful to control hospital acquired infection.

Objective To explore the prevalence and risk factors of knee osteoarthritis (OA) among the elderly in Tianjin. Methods Totally 2038 elderly in Tianjin were investigated from January 2010 to June 2011 according to protocol of APLA-COPCORD Core Questionnaire to identification of risk factors for knee OA. Results The prevalence rates of knee pain and knee OA were 23.1％ and 21.7％,respectively. Knee OA appeared much frequently in women than men (27.6 ％ vs.16.1 ％,x2 =46.893,P＜0.001 ) in the trend of increase with aging(x2 =764.34,P＜0.001).BMI in knee OA group [(25.4±3.3) kg/m2]was significantly higher than in non-knee OA group [(23.8± 2.9) kg/m2],(t =7.944,P＜0.001).Menopause age in female knee OA group was younger than in female non-knee OA group [(50.2±3.7) years vs.(52.8±4.1) years,t=7.665,P＜0.001].Binary logistic regression revealed that age,sex,BMI and age of menopause were risk factors of knee OA,and eating vegetable might prevent from osteoarthritis,whereas there were no significantly association between knee OA and the other factors such as smoking and drinking.Conclusions Age,female and overweight are identified as risk factors of knee OA.