The samples of 340 cases have been tested negative with test paper,of which the positive rate was 2.1%. The negative rate in granular cast was 1.7% with micoscope.

• 在 34 0例尿液试纸带测定为阴性的标本中尿蛋白的阳性率为 2 .；1%25；颗粒管型的镜检阴性为 1