Renal Survival and Validation of Novel International Immunoglobulin a Nephropathy Prediction Tool in Latvian Population: Preliminary Data

Author:

Saulīte Anna Jana12,Popova Anna123,Erts Renārs3,Rācenis Kārlis12,Kučāne Linda4,Pētersons Aivars12,Laurinavičius Arvydas5,Čerņevskis Harijs12,Kuzema Viktorija12

Affiliation:

1. Centre of Nephrology , Pauls Stradiņš Clinical University Hospital , 13 Pilsoņu Str., LV-1002 , Rīga , Latvia

2. Faculty of Medicine , Rīga Stradiņš University , 16 Dzirciema Str., LV-1007 , Rīga , Latvia

3. Faculty of Medicine , University of Latvia , 3 Jelgavas Str., LV-1004 , Rīga Latvia

4. Medicin-och Geriatrikkliniken , Värnamo sjukhus, 33815 Värnamo , Sweden

5. Faculty of Medicine , Vilnius University , 21 M. K. Čiurlionio Str., LT-03101 , Vilnius , Lithuania

Abstract

Abstract The aim of the study was to determine kidney survival and validate the novel international immunoglobulin A nephropathy (IgAN) prediction tool (PT) in the Latvian population. Adults with morphologically confirmed IgAN were included. Kidney survival was analysed with the Kaplan–Meier method. PT-assigned risk was compared with calculated risk by the Cox regression model. The Kaplan–Meier analysis included 95 patients. The five-year kidney survival Q3 was 24 months. Women had longer median kidney-survival time (> 60 months) than men (58 months). Median kidney survival in participants with MEST T0 was longer than 60 months; T1 and T2 were 40 and 18 months, respectively. Median kidney survival in participants with diastolic blood pressure (DBP) < 99 mmHg was longer than 60 months, whereas in patients with DBP 100–109 and 110 mmHg, it was 40 and 24 months, respectively. Cox regression analysis included 68 patients. A moderate degree of correlation was found between predicted and observed five-year risk (p = 0.001). Gender, tubular atrophy/interstitial fibrosis, DBP are significant factors affecting kidney survival. Since there was statistically significant correlation and reliability between PT and follow-up analysis data, we conclude that PT could be applied for use in the Latvian population.

Publisher

Walter de Gruyter GmbH

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