Whether the incidence of these negative side effects can be reduced with TDR remains unestablished.
是否TDR能够减少这些负面效应的发生率尚无研究证实。
To determine whether differences in national trends in tuberculosis incidence are attributable to the variable success of control programmes or to biological, social and economic factors.
判断不同国家结核病发病率趋势的差异是否可归咎于结核控制规划的成效或生物学、社会和经济因素。
To determine whether the installation of deep tube Wells to reduce exposure to groundwater arsenic in rural Bangladesh had an effect on the incidence of childhood diarrhoeal disease.
确定孟加拉国农村地区用以降低地下水砷暴露的深管井的安装对儿童发生腹泻的影响。
The incidence of certain diseases or other negative effects is measured in each group to see whether exposure to the suspect substance is associated with an increase.
对两种人群某种疾病或其他负面影响发病率进行测量，来看暴露于有怀疑本体是否与较高的发病率相关。
Conclusion: the incidence of postpartum depression is high. The main obstetrical factors include the time of pregnancy and abortion, the history of bad procreation way, whether normal delivery or not.
结论：产褥期抑郁症发生率较高，怀孕次数、流产及引产次数、不良生育史、是否正常产是产褥期抑郁症主要的产科危险因素。
Before the infusion, patients should be asked in detail about allergies to reduce the incidence of allergies, whether the patient is allergic.
在输液前，应详细询问过敏史以及患者是否为过敏体质，尽量减少过敏发生率。
Before the infusion, patients should be asked in detail about allergies to reduce the incidence of allergies, whether the patient is allergic.
在输液前，应详细询问过敏史以及患者是否为过敏体质，尽量减少过敏发生率。
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