Utility of untimed single urine protein/creatinine ratio as a substitute for 24-h proteinuria for assessment of proteinuria in systemic lupus erythematosus

Table 3 ROC classification for best PCR cutoffs reflecting 24hP 0.5 g/day using binary 24hP as the gold standard

Probability level	Number of correctly predicted events	Number of correctly predicted nonevents	Number of nonevents predicted as events	Number of events predicted as nonevents	Sensitivity	Specificity	PCR
0.983	65	570	1	597	0.098	0.998	0.138
0.970	66	570	1	596	0.100	0.998	0.128
0.909	66	569	2	596	0.100	0.996	0.108
0.847	552	519	52	110	0.834	0.909	0.098
0.754	579	493	78	83	0.875	0.863	0.088
0.628	604	458	113	58	0.912	0.802	0.078
0.340	634	385	186	28	0.958	0.674	0.058

24hP protein content in a 24-h urine collection sample, PCR untimed sample of urine protein/creatinine ratio, ROC receiver operating characteristic
Boldface type indicates statistically significant values

ISSN: 1478-6362