The primary outcome was the risk of death among obstetric emergency patients, calculated with crude case fatality rates and crude odds ratios.

主要结果是以粗致死率和粗优势比计算的产科急诊病人的死亡风险。

youdao

Although high-volume units treated the sickest infants and had highest crude death rates, when the statistics were adjusted for factors such as the severity of the illness, patient volume and staffing provision, unit size did not influence death or brain damage rates.

BBC: 'Baby death risk' of busy units