目的探讨危险因素调整的医院感染发病密度的计算方法及意义。
OBJECTIVE To discuss the calculation and epidemiological significance for risk factors adjusted incidence density of nosocomial infection.
方法比较医院感染累积发病率、发病密度和危险因素调整的发病密度的计算原理。
Methods to compare the principles and calculation methods of cumulative incidence rate, incidence density, and risk factors adjusted incidence density.
硒还可以帮助降低低密度脂蛋白或者坏胆固醇浓度，并减低血栓和心脏病的发病率。
Selenium also helps lower LDL or "bad" cholesterol and reduces the incidence of blood clots and heart disease.
有研究显示，1天喝3杯绿茶能偶降低11%心脏病发病率，还能提高对人体有好处的高密度脂蛋白胆固醇水平。
Studies have shown that drinking three cups of green tea a day can decrease heart attack rate by 11 percent, and that it can also raise levels of "good" HDL cholesterol.
发病程度除与品种、气象条件有关外，还与灌水，播种时期，密度，播种方法等栽培措施关系密切。
Disease incidence related closely with not only varieties and meterological condition, but cultivation practices such as irrigation, sowing date, sowing density, sowing method and so on.
同时，分别以鼠密度、灭鼠率的变化与鼠传疾病发病率进行相关系数分析。
The correlation coefficients of rat density, deratization rates and the incidence of rat transmissible diseases were calculated.
目的：观察大鼠纹状体毛细血管密度的增龄变化，为探讨纹状体易卒中机制，揭示脑血管病发病机理提供参考资料。
Objecive:To observe and measure the capillary density of the striatus so as to provide references for further understanding of the etiology and pathogenesis of certain cerebrovascular disease.
研究发现，女烟民每吸烟10年，骨矿物质密度就会降低2.3%―3.3%，骨质密度下降会导致骨折和骨质疏松症发病率大增。
Study found that female smokers smoke every 10 years, bone mineral density is reduced by 2.3%-3.3% fall in bone density leading to fractures and osteoporosis incidence rate rose significantly.
生命后期，那些鼠有较高的矿物密度(BMD)和较高的骨关节炎发病率。
Later in life, those mice had higher bone mineral density (BMD) and higher rates of osteoarthritis.
尤其是高密度脂蛋白胆固醇，低密度脂蛋白胆固醇是预测脑卒中发病的重要的易患因子。
The ratio of high density lipoprotein and low density lipoprotein is the important factor in predicting of stroke.
近几年发病率的上升与较高的鼠密度和鼠间汉坦病毒普遍感染有关。
The increasing incident rate is related to the high rodents density and the rate of infected virus in the rodents.
结果：当中华按蚊密度降低时，疟疾发病、居民血清抗体水平亦随之下降。
The result showed that the incidence of malaria and the serum antibody level of the residents declined after the mosquito density had declined.
近几年发病率的上升与较高的鼠密度和鼠间感染有关。
The incident had been increasing as the density of rodents and the rate of infected virus in the rodents was going up.
近几年发病率的上升与较高的鼠密度和鼠间感染有关。
The incident had been increasing as the density of rodents and the rate of infected virus in the rodents was going up.
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