we conducted a prospective cohort study of patients aged 25 years that presented to emergency departments with injuries requiring x-rays or ct for suspected fracture.
我们对在急诊科年龄小于25岁的、怀疑骨折需要做x线或ct检查的创伤患者进行前瞻性队列研究。
design: a prospective cohort study with a 2-year follow-up.
研究设计:两年随访的前瞻性队列研究。
design: in a prospective cohort study of 21,327 participants from physicians' health study i, egg consumption was assessed with an abbreviated food questionnaire.
设计:数据来自一21327名医师参加的前瞻性队列研究—-医师健康研究,鸡蛋消费量用简要食物问卷评估。