分类变量以优势 4 / 11 比(odds ratio，OR)和需要治疗的患者数(number needed to treat，NNT)作为临床疗效评价的指标。
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需要治疗的患者数 NNT ; number needed to treat
处理的患者数 number needed to treat ; NNT
治疗的患者数 number needed to treat ; NNT
需治疗的患者数 number needed to treat ; NNT
需要处理的患者数 number needed to treat ; NNT
个事件需治疗的患者数 Number needed to be treated ; NNT
计算需要处理的患者数 number needed to treat ; NNT
发生必须治疗的患者数 number needed to treat ; NNT
伤害的患者数 Number Need to Harm ; NNH
两种方法结果显示，疟疾病情越严重、传播强度越大时，采用IPTi的患者数比例就越高。
Findings from the two approaches indicated that the percentage of cases targeted by IPTi increases with the severity of the malaria outcome and with transmission intensity.
部分系统部门的雇员数甚至减少，例如那些协助脑中风、癫痫和其它精神疾病患者的部门。
Some have even shrunk, such as the agency that helps people suffering from cerebral palsy, epilepsy and other such mental disabilities.
他们发现，抗抑郁药处方数的增多并不是因为接受这种药物的患者增多了。
They found that the rise in the overall number of antidepressant prescriptions was not due to increasing Numbers of patients receiving antidepressants.
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