哪个正确，谢谢

Routine preoperative coagulation testing has not been proven to help identify patients at risk for intra- and postoperative bleeding [1, 2]. Multiple factors contribute to the low positive predictive value of routine coagulation screening in operative patients.

• A low prevalence of bleeding disorders in the general population which when combined with indiscriminant testing can increase the frequency of false positive results

出血性疾病在普通人群中的患病率较低，加上对人群不加区分的检测，可能会增加假阳性结果的频率

出血性疾病在普通人群中的患病率较低，若对检测结果不加区别地应用，可能会增加假阳性结果的频率[3]。