Periprosthetic joint infection has been associated with a number of host risk factors, including malnutrition, smoking, alcoholism, urinary tract infection, and obesity (Table I).

关节假体周围感染与以下主要因素有关：营养不良、抽烟、酗酒、尿路感染及肥胖(表1)。

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But the researchers were able to isolate the link between drinking and breast cancer by controlling for a host of other risk factors, such as family history of the disease and age at first pregnancy.

但是研究者可能会通过控制其他的患病因素会割裂饮酒与患乳腺癌的联系，比如家族病史和初次怀孕年龄。

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Stateside, analysts have been known to get very nervous even when host nations are either perceived as politically risky or when risk factors are not well quantified.

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In fact, most of the highly precautionary laws and regulations currently on the books include some form of risk assessment that error on the side of caution, building in a host of safety factors that substantially overestimate exposure to justify regulatory actions that may not be necessary.

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