主要危险因素为吸烟、饮酒、体重指数。
Risk factors were smoking, drinking and Body Mass Index (BMI).
他还说，酒店也为吸烟者设有专门的吸烟区。
For smokers, the hotel also has special smoking areas, Li said.
应力性骨折的危险因素为吸烟和入伍后跟不上行军速度，OR值分别为1.67和1.70 ；
Smoking and drop behind during marching were risk factors with OR 1.67 and 1.70 respectively.
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