{"id":9975,"date":"2023-03-02T20:17:17","date_gmt":"2023-03-02T20:17:17","guid":{"rendered":"https:\/\/medicalcriteria.com\/web\/?p=9975"},"modified":"2025-12-30T19:53:43","modified_gmt":"2025-12-30T19:53:43","slug":"ckd-classification","status":"publish","type":"post","link":"https:\/\/medicalcriteria.com\/web\/ckd-classification\/","title":{"rendered":"Classification and Prognosis of Chronic Kidney Disease"},"content":{"rendered":"<div class=\"99c380e4b4a7b96c35d7ddf7dcb434e8\" data-index=\"1\" style=\"float: none; margin:0px 0 0px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<!-- MC 2019- Horizontal -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block\"\r\n     data-ad-client=\"ca-pub-0127150553352455\"\r\n     data-ad-slot=\"3806776041\"\r\n     data-ad-format=\"auto\"\r\n     data-full-width-responsive=\"true\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n<p>CKD is defined as kidney damage or glomerular filtration rate (GFR) &lt;60 mL\/min\/1.73 m(2) for 3 months or more, irrespective of cause. Kidney damage in many kidney diseases can be ascertained by the presence of albuminuria, defined as albumin-to-creatinine ratio &gt;30 mg\/g in two of three spot urine specimens.<!--more--><\/p>\n<p><strong>Chronic kidney disease classification based upon glomerular filtration rate and albuminuria<\/strong><\/p>\n<table style=\"border-collapse: collapse; width: 100%; height: 278px;\" border=\"1\">\n<tbody>\n<tr style=\"height: 48px;\">\n<td style=\"width: 18.8255%; height: 48px;\"><strong>GFR stages<\/strong><\/td>\n<td style=\"width: 27.2452%; height: 48px;\"><strong>GFR <\/strong><strong>(mL\/min\/1.73 m2)<\/strong><\/td>\n<td style=\"width: 53.9292%; height: 48px;\"><strong>Terms<\/strong><\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 18.8255%; height: 24px;\">G1<\/td>\n<td style=\"width: 27.2452%; height: 24px;\">\u226590<\/td>\n<td style=\"width: 53.9292%; height: 24px;\">Normal or high<\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 18.8255%; height: 24px;\">G2<\/td>\n<td style=\"width: 27.2452%; height: 24px;\">60 to 89<\/td>\n<td style=\"width: 53.9292%; height: 24px;\">Mildly decreased<\/td>\n<\/tr>\n<tr style=\"height: 14px;\">\n<td style=\"width: 18.8255%; height: 14px;\">G3a<\/td>\n<td style=\"width: 27.2452%; height: 14px;\">45 to 59<\/td>\n<td style=\"width: 53.9292%; height: 14px;\">Mildly to moderately decreased<\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 18.8255%; height: 24px;\">G3b<\/td>\n<td style=\"width: 27.2452%; height: 24px;\">30 to 44<\/td>\n<td style=\"width: 53.9292%; height: 24px;\">Moderately to severely decreased<\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 18.8255%; height: 24px;\">G4<\/td>\n<td style=\"width: 27.2452%; height: 24px;\">15 to 29<\/td>\n<td style=\"width: 53.9292%; height: 24px;\">Severely decreased<\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 18.8255%; height: 24px;\">G5<\/td>\n<td style=\"width: 27.2452%; height: 24px;\">&lt;15<\/td>\n<td style=\"width: 53.9292%; height: 24px;\">Kidney failure (add D if treated by dialysis)<\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 18.8255%; height: 24px;\"><strong>Albuminuria stages<\/strong><\/td>\n<td style=\"width: 27.2452%; height: 24px;\"><strong>AER (mg\/day)<\/strong><\/td>\n<td style=\"width: 53.9292%; height: 24px;\"><strong>Terms<\/strong><\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 18.8255%; height: 24px;\">A1<\/td>\n<td style=\"width: 27.2452%; height: 24px;\">&lt;30<\/td>\n<td style=\"width: 53.9292%; height: 24px;\">Normal to mildly increased (may be subdivided for risk prediction)<\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 18.8255%; height: 24px;\">A2<\/td>\n<td style=\"width: 27.2452%; height: 24px;\">30 to 300<\/td>\n<td style=\"width: 53.9292%; height: 24px;\">Moderately increased<\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 18.8255%; height: 24px;\">A3<\/td>\n<td style=\"width: 27.2452%; height: 24px;\">&gt;300<\/td>\n<td style=\"width: 53.9292%; height: 24px;\">Severely increased (may be subdivided into nephrotic and nonnephrotic for differential diagnosis, management, and risk prediction)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>The cause of CKD is also included in the KDIGO revised classification but is not included in this table.<br \/>\nGFR: glomerular filtration rate; AER: albumin excretion rate; CKD: chronic kidney disease; KDIGO: Kidney Disease Improving Global Outcomes.<\/p>\n<p><strong>Prognosis of CKD by GFR and Albuminuria Categories<\/strong><\/p>\n<table style=\"border-collapse: collapse; width: 100%; height: 240px;\" border=\"1\">\n<tbody>\n<tr style=\"height: 24px;\">\n<td style=\"width: 45.2258%; text-align: center; height: 96px;\" colspan=\"4\" rowspan=\"4\"><strong>Prognosis of CKD by GFR and Albuminuria Categories:<\/strong><br \/>\n<strong>KDIGO 2012<\/strong><\/td>\n<td style=\"width: 54.7742%; height: 24px; text-align: center;\" colspan=\"3\"><strong>Persistent albuminuria categories<\/strong><br \/>\n<strong>Description and range<\/strong><\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 19.3375%; height: 24px; text-align: center;\"><strong>A1<\/strong><\/td>\n<td style=\"width: 17.7831%; height: 24px; text-align: center;\"><strong>A2<\/strong><\/td>\n<td style=\"width: 17.6536%; height: 24px; text-align: center;\"><strong>A3<\/strong><\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 19.3375%; height: 24px; text-align: center;\">Normal to mildly<br \/>\nincreased<\/td>\n<td style=\"width: 17.7831%; height: 24px; text-align: center;\">Moderately<br \/>\nincreased<\/td>\n<td style=\"width: 17.6536%; height: 24px; text-align: center;\">Severely<br \/>\nincreased<\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 19.3375%; height: 24px; text-align: center;\">&lt;30 mg\/g<br \/>\n&lt;3 mg\/mmol<\/td>\n<td style=\"width: 17.7831%; height: 24px; text-align: center;\">30-300 mg\/g<br \/>\n3-30 mg\/mmol<\/td>\n<td style=\"width: 17.6536%; height: 24px; text-align: center;\">&gt;300 mg\/g<br \/>\n&gt;30 mg\/mmol<\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 11.1769%; height: 144px;\" rowspan=\"6\"><strong>GFR categories (ml\/min\/ 1.73 m2)<\/strong><br \/>\n<strong>Description and range<\/strong><\/td>\n<td style=\"width: 5.99554%; height: 24px;\"><strong>G1<\/strong><\/td>\n<td style=\"width: 20.7624%; height: 24px;\">Normal<br \/>\nor high<\/td>\n<td style=\"width: 7.29092%; height: 24px;\">\u226590<\/td>\n<td style=\"width: 19.3375%; height: 24px; background-color: #7fff00;\"><\/td>\n<td style=\"width: 17.7831%; height: 24px; background-color: #ffd700;\"><\/td>\n<td style=\"width: 17.6536%; height: 24px; background-color: #daa520;\"><\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 5.99554%; height: 24px;\"><strong>G2<\/strong><\/td>\n<td style=\"width: 20.7624%; height: 24px;\">Mildly<br \/>\ndecreased<\/td>\n<td style=\"width: 7.29092%; height: 24px;\">60-89<\/td>\n<td style=\"width: 19.3375%; height: 24px; background-color: #7fff00;\"><\/td>\n<td style=\"width: 17.7831%; height: 24px; background-color: #ffd700;\"><\/td>\n<td style=\"width: 17.6536%; height: 24px; background-color: #daa520;\"><\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 5.99554%; height: 24px;\"><strong>G3a<\/strong><\/td>\n<td style=\"width: 20.7624%; height: 24px;\">Mildly to moderately<br \/>\ndecreased<\/td>\n<td style=\"width: 7.29092%; height: 24px;\">45-59<\/td>\n<td style=\"width: 19.3375%; height: 24px; background-color: #ffd700;\"><\/td>\n<td style=\"width: 17.7831%; height: 24px; background-color: #daa520;\"><\/td>\n<td style=\"width: 17.6536%; height: 24px; background-color: #dc143c;\"><\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 5.99554%; height: 24px;\"><strong>G3b<\/strong><\/td>\n<td style=\"width: 20.7624%; height: 24px;\">Moderately to<br \/>\nseverely decreased<\/td>\n<td style=\"width: 7.29092%; height: 24px;\">30-44<\/td>\n<td style=\"width: 19.3375%; height: 24px; background-color: #daa520;\"><\/td>\n<td style=\"width: 17.7831%; height: 24px; background-color: #dc143c;\"><\/td>\n<td style=\"width: 17.6536%; height: 24px; background-color: #dc143c;\"><\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 5.99554%; height: 24px;\"><strong>G4<\/strong><\/td>\n<td style=\"width: 20.7624%; height: 24px;\">Severely<br \/>\ndecreased<\/td>\n<td style=\"width: 7.29092%; height: 24px;\">15-29<\/td>\n<td style=\"width: 19.3375%; height: 24px; background-color: #dc143c;\"><\/td>\n<td style=\"width: 17.7831%; height: 24px; background-color: #dc143c;\"><\/td>\n<td style=\"width: 17.6536%; height: 24px; background-color: #dc143c;\"><\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 5.99554%; height: 24px;\"><strong>G5<\/strong><\/td>\n<td style=\"width: 20.7624%; height: 24px;\">Kidney<br \/>\nfailure<\/td>\n<td style=\"width: 7.29092%; height: 24px;\">&lt;15<\/td>\n<td style=\"width: 19.3375%; height: 24px; background-color: #dc143c;\"><\/td>\n<td style=\"width: 17.7831%; height: 24px; background-color: #dc143c;\"><\/td>\n<td style=\"width: 17.6536%; height: 24px; background-color: #dc143c;\"><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Green: low risk (if no other markers of kidney disease, no CKD); Yellow: moderately increased risk; Orange: high risk; Red, very high risk.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>References:<\/strong><\/p>\n<ol>\n<li>National Kidney Foundation. K\/DOQI clinical practice guidelines for chronic kidney disease: evaluation, classification, and stratification. Am J Kidney Dis. 2002 Feb;39(2 Suppl 1):S1-266. <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/11904577\/\" target=\"_blank\" rel=\"noopener\">[Medline]<\/a><\/li>\n<li>Levey AS, Eckardt KU, Tsukamoto Y, Levin A, Coresh J, Rossert J, De Zeeuw D, Hostetter TH, Lameire N, Eknoyan G. Definition and classification of chronic kidney disease: a position statement from Kidney Disease: Improving Global Outcomes (KDIGO). Kidney Int. 2005 Jun;67(6):2089-100. <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/15882252\/\" target=\"_blank\" rel=\"noopener\">[Medline]<\/a><\/li>\n<li>Summary of Recommendation Statements. Kidney Int Suppl (2011). 2013 Jan;3(1):5-14. <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/25598998\/\" target=\"_blank\" rel=\"noopener\">[Medline]<\/a><\/li>\n<li>Yang C, Tonelli M, James MT, Tan Z, Bakker WM, Gansevoort RT, Vart P. Incidence and Adverse Outcomes of Acute Kidney Disease: A Systematic Review and Meta-Analysis. Am J Kidney Dis. 2025 Oct;86(4):448-464. <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/40609854\/\" target=\"_blank\" rel=\"noopener\">[Medline]<\/a><\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<p>Created Feb 24, 2023.<br \/>\nUp-date Dec 30, 2025.<\/p>\n\n<div style=\"font-size: 0px; height: 0px; line-height: 0px; margin: 0; padding: 0; clear: both;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>Sorry, this entry is only available in Espa\u00f1ol.<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"no","_lmt_disable":"no","_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[473],"tags":[146,166,167,145,51,671,900,2557,2558,199],"class_list":["post-9975","post","type-post","status-publish","format-standard","hentry","category-nephrology","tag-chronic","tag-clasificacion","tag-classification","tag-cronica","tag-disease","tag-insuficiencia","tag-kidney","tag-prognosis","tag-pronostico","tag-renal"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - 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