In order to explore the risk factors of osteoporosis , a 1:1 matched case-control study was conducted on 157 pairs of intellectuals with age above 40 years. Bone mineral density of distal radius was measured using single photon absorptiometry and radiograph of calcaneus was classified according to Jhamaris's method.Multivarious factors related to diet, physical exercise, tea drinking, smoking,menstrual and reproductive history were significantly associated with osteoporosis. In a multiple conditional logistic regression model, low calcium intake, exercise index before 40 years of age, average time of exercise per week above 40 years old, tea consumption, and the number of years after menopause in women were the most important and predictive factors. The risk led by lower calcium intake was higher in women than in men. The risk due to lack of regular exercise was more prominent in men,but for both sexes lack of exercise in early years of life was more risky than that in later years. As many people have habit of excessive tea drinking, the exact effect of tea on osteoporosis deserves further study.

Objective To approach the reasons and influence factors about sudden deafness of nurs-es in the operating room. Methods We investigated the psychologic status and etiological factors of nurs-es in operating room through questionnaires designed by ourselves about general work pressure and sudden deafness correlative reasons. Results The total score of pressure was 21.486,among which rush work and check and examination,worrying about mistakes and accidents, pricking wound were the main reasons re-suiting in sudden deafness for the operating room nurses. Conclusions Enhancement of psychological nursing, health education and working environment improvement can lessen the anxiety emotion of nurses who have sudden deafness and has considerable effect to promote recovery.