研究中5%的男性有心衰史或心脏病发作史，其中43%的人因此死亡。
Five percent of the men in the study had a history of heart failure or heart attack and 43 of those men died.
在2型糖尿病老年患者中，有严重低血糖发作史的患者患痴呆的危险性更大。
Among older patients with type 2 diabetes, a history of severe hypoglycemic episodes was associated with a greater risk of dementia.
比如，一些曾经有过心脏病发作史的研究对象从小睡中的获益相对于那些健康人要明显得多。
The subjects in some, for example, had survived heart attacks and may therefore have benefited more from napping than healthy individuals do.
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