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단회뇨의 protein/creatinine ratio를 이용한 일일 뇨단백량 예측에 영향을 미치는 인자
강신욱(Shin Wook Kang),최규헌(Kyu Hun Choi),이호영(Ho Yung Lee),한대석(Dae Suk Han),유태현(Tae Hyeon Yoo),류동렬(Dong Yul Ryu),신석균(Sug Kyun Shin),하성규(Sung Kyu Ha),노현진(Hyun Jin Noh),송현용(Hyun Yong Song),황재하(Jae Ha Hwang) 대한신장학회 2000 Kidney Research and Clinical Practice Vol.19 No.1
N/A It's well known that protein/creatinine ratio(P/C ratio) in random urine samples reflects 24-hour urine protein. However, the factors affecting accurate quantitation of proteinuria using random urine P/C ratio are not fully evaluated. The aim of this study is to evaluate factors affecting accurate quantitaion of proteinuria using random urine P/C ratio. 118 patients admitted in Yonsei university medical center during June 1998 and Dec. 1998 were assessed for the measurement of random urine protein/creatinine ratio from second voided urine. 118 patients(mean age 41.5year, male: female 2.36: 1) had mean creati-nine level 1.83±1.78mg/dL, 24-hour pmteinuria 6.06±7.64g/day and P/C ratio 4.80±4.48, All the patiient.s were divided into A, B, C, I, II, K, IV according to serum creatinine level and 24-hour proteinurim amount. The correlation coefficient(R value) between proteinuria and P/C ratio are shown that in all pa- tients is 0.875, group A(Cr≤1.4) 0.884, group B(1A <Cr≤4.0) 0.819, group C(4,0<Cr) 0.844, gmup I (24-hr pro'≤0.3) 0.8%, group II(0.3<24-hr pro≤1.0) 0.813, group III(1.0<24-hr pro≤3.5) 0.716, group IV (3.5<24-hr pro) 0.637. These R value were statisti-cally significant(p value<0.05).(Cr serum creatinine, mg/dL, 24-hr pro ' 24-hour urine protein amount, g/day). Greater amount of proteinuria in 24-hour urine less correlated in sensitivity, specificity and positive predictive value with random urine P/C ratio. To evaluate factors affecting accurate quantitation of proteinuria by P/C ratio, multiple regression analysis was performed. The factors affecting accurate quantitation of proteinuria using random urine P/C ratio was 24-hour urine protein amount, not serum creatinine. Especially, in the patients with 24-hour pro-teinuria less than 4.0g/day, the random urine P/C ratio predicted 24-hour urine protein amount most accurately. In conclusion, random urine P/C ratio was well correlated with 24-hour proteinuria in the non-ne-phrotic range proteinuria especially, under 4.0g/day, irrespective of serum creatinine level.
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