Turkmen, A, Sumnu, A, Cebeci, E, Yazici, H, Eren, N, Seyahi, N, Dilek, K, Dede, F, Derici, U, Unsal, A, Sahin, G, Sipahioglu, M, Gok, M, Tatar, E, Dursun, B, Sipahi, S, Yilmaz, M, Suleymanlar, G, Ulu, S, Gungor, O, Kutlay, S, Bahcebasi, ZB, Sahin, I, Kurultak, I, Turkmen, K, Yilmaz, Z, Kazancioglu, RT, Cavdar, C, Candan, F, Aydin, Z, Oygar, DD, Gul, CB, Arici, M, Paydas, S, Taymez, DG, Kucuk, M, Trablus, S, Turgutalp, K, Koc, L, Sezer, S, Duranay, M, Bardak, S, Altintepe, L, Arikan, IH, Azak, A, Odabas, AR, Sahin, GM, and Ozturk, S
Background The largest data on the epidemiology of primary glomerular diseases (PGDs) are obtained from the databases of countries or centers. Here, we present the extended results of the Primary Glomerular Diseases Study of the Turkish Society of Nephrology Glomerular Diseases (TSN-GOLD) Working Group. Methods Data of patients who underwent renal biopsy and received the diagnosis of PGD were recorded in the database prepared for the study. A total of 4399 patients from 47 centers were evaluated between May 2009 and May 2019. The data obtained at the time of kidney biopsy were analyzed. After the exclusion of patients without light microscopy and immunofluorescence microscopy findings, a total of 3875 patients were included in the study. Results The mean age was 41.5 +/- 14.9 years. 1690 patients were female (43.6%) and 2185 (56.3%) were male. Nephrotic syndrome was the most common biopsy indication (51.7%). This was followed by asymptomatic urinary abnormalities (18.3%) and nephritic syndrome (17.8%). The most common PGD was IgA nephropathy (25.7%) followed by membranous nephropathy (25.6%) and focal segmental glomerulosclerosis (21.9%). The mean total number of glomeruli per biopsy was 17 +/- 10. The mean baseline systolic blood pressure was 130 +/- 20 mmHg and diastolic blood pressure was 81 +/- 12 mmHg. The median proteinuria, serum creatinine, estimated GFR, and mean albumin values were 3300 (IQR: 1467-6307) mg/day, 1.0 (IQR: 0.7-1.6) mg/dL, 82.9 (IQR: 47.0-113.0) mL/min and 3.2 +/- 0.9 g/dL, respectively. Conclusions The distribution of PGDs in Turkey has become similar to that in other European countries. IgA nephropathy diagnosed via renal biopsy has become more prevalent compared to membranous nephropathy. C1 [Turkmen, Aydin; Yazici, Halil] Istanbul Univ, Istanbul Med Fac, Nephrol, Istanbul, Turkey. [Sumnu, Abdullah] Istanbul Medipol Univ, Med Fac, Nephrol, Istanbul, Turkey. [Cebeci, Egemen; Ozturk, Savas] Haseki Training & Res Hosp, Nephrol, Istanbul, Turkey. [Eren, Necmi] Kocaeli Univ, Med Fac, Nephrol, Kocaeli, Turkey. [Seyahi, Nurhan] Istanbul Univ, Cerrahpasa Med Fac, Nephrol, Istanbul, Turkey. [Dilek, Kamil] Uludag Univ, Med Fac, Nephrol, Bursa, Turkey. [Dede, Fatih] Ankara Numune Training & Res Hosp, Nephrol, Ankara, Turkey. [Derici, Ulver] Gazi Univ, Med Fac, Nephrol, Ankara, Turkey. [Unsal, Abdulkadir] Hamidiye Sisli Etfal Training & Res Hosp, Nephrol, Istanbul, Turkey. [Sahin, Garip] Eskisehir Osmangazi Univ, Med Fac, Nephrol, Eskisehir, Turkey. [Sipahioglu, Murat] Erciyes Univ, Med Fac, Nephrol, Kayseri, Turkey. [Gok, Mahmut; Sahin, Gulizar Manga] Sultan Abdulhamit Han Training & Res Hosp, Nephrol, Istanbul, Turkey. [Tatar, Erhan] Izmir Bozyaka Training & Res Hosp, Nephrol, Izmir, Turkey. [Dursun, Belda] Pamukkale Univ, Med Fac, Nephrol, Denizli, Turkey. [Sipahi, Savas] Sakarya Univ, Med Fac, Nephrol, Adapazari, Sakarya, Turkey. [Yilmaz, Murvet] Bakirkoy Sadi Konuk Training & Res Hosp, Nephrol, Istanbul, Turkey. [Suleymanlar, Gultekin] Akdeniz Univ, Med Fac, Nephrol, Antalya, Turkey. [Ulu, Sena] Afyon Kocatepe Univ, Med Fac, Nephrol, Afyon, Turkey. [Gungor, Ozkan] Sutcu Imam Univ, Med Fac, Nephrol, Kahramanmaras, Turkey. [Kutlay, Sim] Ankara Univ, Ibni Sina Hosp, Med Fac, Nephrol, Ankara, Turkey. [Bahcebasi, Zerrin Bicik] Dr Lutfi Kirdar Kartal Training & Res Hosp, Nephrol, Istanbul, Turkey. [Sahin, Idris] Inonu Univ, Med Fac, Nephrol, Malatya, Turkey. [Kurultak, Ilhan] Trakya Univ, Med Fac, Nephrol, Edirne, Turkey. [Turkmen, Kultigin] Necmettin Erbakan Univ, Meram Med Fac, Nephrol, Konya, Turkey. [Yilmaz, Zulfikar] Dicle Univ, Med Fac, Nephrol, Diyarbakir, Turkey. [Kazancioglu, Rumeyza Turan] Bezmialem Vakif Univ, Med Fac, Nephrol, Istanbul, Turkey. [Cavdar, Caner] Dokuz Eylul Univ, Med Fac, Nephrol, Izmir, Turkey. [Candan, Ferhan] Cumhuriyet Univ, Med Fac, Nephrol, Sivas, Turkey. [Aydin, Zeki] Darica Farabi Training & Res Hosp, Nephrol, Kocaeli, Turkey. [Oygar, Duriye Deren] Doktor Burhan Nalbantoglu State Hosp, Nicosia, Cyprus. [Gul, Cuma Bulent] Bursa Yuksek Ihtisas Training & Res Hosp, Nephrol, Bursa, Turkey. [Arici, Mustafa] Hacettepe Univ, Med Fac, Nephrol, Ankara, Turkey. [Paydas, Saime] Cukurova Univ, Med Fac, Nephrol, Adana, Turkey. [Taymez, Dilek Guven] Kocaeli State Hosp, Nephrol, Kocaeli, Turkey. [Kucuk, Mehmet] Okmeydani Training & Res Hosp, Nephrol, Istanbul, Turkey. [Trablus, Sinan] Istanbul Training & Res Hosp, Nephrol, Istanbul, Turkey. [Turgutalp, Kenan] Mersin Univ, Med Fac, Nephrol, Mersin, Turkey. [Koc, Leyla] Taksim Training & Res Hosp, Nephrol, Istanbul, Turkey. [Sezer, Siren] Baskent Univ, Med Fac, Nephrol, Ankara, Turkey. [Duranay, Murat] Ankara Numune Training & Res Hosp, Nephrol, Ankara, Turkey. [Bardak, Simge] Batman State Hosp, Nephrol, Batman, Turkey. [Altintepe, Lutfullah] Selcuk Univ, Selcuk Med Fac, Nephrol, Konya, Turkey. [Arikan, Izzet Hakki] Marmara Univ, Med Fac, Nephrol, Istanbul, Turkey. [Azak, Alper] Balikesir Training & Res Hosp, Nephrol, Balikesir, Turkey. [Odabas, Ali Riza] Goztepe Training & Res Hosp, Nephrol, Istanbul, Turkey.