第二，糖尿病发病率是患者自己报告的，但可能一些病人之前已经处于亚糖尿病状态。
Secondly, the diabetes incidence was self-reported and there is a possibility that some patients may have been underdiagnosed for diabetes.
发病率用来表示特定人群中的发病频率和得病状况。
Morbidity rates measure the frequency of illness or morbidity within specific populations.
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