{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T16:32:31Z","timestamp":1791477151416,"version":"4.3.4"},"reference-count":18,"publisher":"SAGE Publications","license":[{"start":{"date-parts":[[2026,8,3]],"date-time":"2026-08-03T00:00:00Z","timestamp":1785715200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Urologia"],"abstract":"<jats:p>The significant rise in stone disease has led to an increased popularity of percutaneous nephrolithotomy for the management of substantial stone burdens. Despite ongoing advancements in technology and surgical methods, overall complication rates of PCNL have gone up. For the best decision-making and well-informed patient counselling, a precise assessment of treatment success is essential. CT scans offer high-resolution spatial imaging that precisely characterizes stone size and distribution, pelvicaliceal anatomy, anomalies, and anatomical relationships. With these measurable stone and patient features, the Guy\u2019s Stone Score, S.T.O.N.E. score and CROES nephrolithometric nomograms have been introduced for systematic and quantitative assessment of kidney stones. There is no study evaluating the efficacy of these three scoring systems in patients undergoing supine PCNL. We prospectively analysed 100 patients over a period of 20\u2009months (December 2022\u2013July 2024). Analysis of relationship between residual calculus, Procedure Time (PT), Scope Time (ST), Fluoroscopy Time (FT) and duration of hospital stay and complications with different nephrolithometric scoring was done. ROC curve was drawn comparing all three scores. AUC for GSS is 0.711, STONE score is 0.705, and CROES score is 0.772 for predicting stone clearance. However, CROES score had highest sensitivity 97.3 but specificity and NPV of GSS is highest for predicting stone clearance with accuracy of 71.58%. For predicting complications AUC for GSS is 0.678, STONE score is 0.537, and CROES score is 0.591. Sensitivity of CROES is 95.7% but PPV, NPV, and accuracy is highest for Guy\u2019s stone score but data is insignificant. SFR in our study was 63%. SFR corroborated significantly with low Guy\u2019s score, low STONE score, and high CROES score. All three nomograms have statistically significant correlation with SFR. Except CROES Score, other two Scores have statistically significantly correlation with complications.<\/jats:p>","DOI":"10.1177\/03915603261465321","type":"journal-article","created":{"date-parts":[[2026,8,3]],"date-time":"2026-08-03T10:38:36Z","timestamp":1785753516000},"update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":1,"title":["A prospective comparative study of different nephrolithometric scoring system for nephrolithiasis to predict stone free status and complications in supine PCNL"],"prefix":"10.1177","author":[{"ORCID":"https:\/\/orcid.org\/0009-0007-6636-8763","authenticated-orcid":false,"given":"Prakhar","family":"Patel","sequence":"first","affiliation":[{"name":"Department of Urology, Medical College and Hospital Kolkata, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1899-9196","authenticated-orcid":false,"given":"Sunirmal","family":"Choudhury","sequence":"additional","affiliation":[{"name":"Department of Urology, Medical College and Hospital Kolkata, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5426-8705","authenticated-orcid":false,"given":"Sudipta","family":"Saha","sequence":"additional","affiliation":[{"name":"Head of Department in Medical College kolkata, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2194-7423","authenticated-orcid":false,"given":"Pushpak","family":"Das","sequence":"additional","affiliation":[{"name":"Department of Community Medicine, Medical College and Hospital Kolkata, India"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2026,8,3]]},"reference":[{"key":"e_1_3_2_2_2","doi-asserted-by":"crossref","unstructured":"Fernstr\u00f6m I Johansson B. Percutaneous pyelolithotomy. A new extraction technique. Scand J Urol Nephrol 1976; 10(3): 257\u2013259. https:\/\/doi.org\/10.1080\/21681805.1976.11882084","DOI":"10.1080\/21681805.1976.11882084"},{"key":"e_1_3_2_3_2","doi-asserted-by":"crossref","unstructured":"Ibarluzea G Scoffone CM Cracco CM et al. Supine Valdivia and modified lithotomy position for simultaneous anterograde and retrograde endourological access. BJU Int 2007; 100(1): 233\u2013236. https:\/\/doi.org\/10.1111\/j.1464-410x.2007.06960.x","DOI":"10.1111\/j.1464-410X.2007.06960.x"},{"key":"e_1_3_2_4_2","doi-asserted-by":"crossref","unstructured":"Giusti G Proietti S. Supine PCNL is the way to go! Cent Eur J Urol 2017; 70(1): 66\u201367. https:\/\/doi.org\/10.5173\/ceju.2017.1311","DOI":"10.5173\/ceju.2017.1311"},{"key":"e_1_3_2_5_2","doi-asserted-by":"crossref","unstructured":"Choudhury S Sinha Roy PP Pal DK. Calcutta position: a new modified supine decubitus for supine PCNL. Urologia 2024; 91(1): 125\u2013130. https:\/\/doi.org\/10.1177\/03915603231191268","DOI":"10.1177\/03915603231191268"},{"key":"e_1_3_2_6_2","doi-asserted-by":"crossref","unstructured":"Thomas K Smith NC Hegarty N et al. The Guy\u2019s stone score\u2013grading the complexity of percutaneous nephrolithotomy procedures. Urology 2011; 78: 277\u2013281. https:\/\/doi.org\/10.1016\/j.urology.2010.12.026","DOI":"10.1016\/j.urology.2010.12.026"},{"key":"e_1_3_2_7_2","doi-asserted-by":"crossref","unstructured":"Okhunov Z Friedlander JI George AK et al. S.T.O.N.E. nephrolithometry: novel surgical classification system for kidney calculi. Urology 2013; 81(6): 1154\u20131160. https:\/\/doi.org\/10.1016\/j.urology.2012.10.083","DOI":"10.1016\/j.urology.2012.10.083"},{"key":"e_1_3_2_8_2","doi-asserted-by":"crossref","unstructured":"Smith A Averch TD Shahrour K et al. A nephrolithometric nomogram to predict treatment success of percutaneous nephrolithotomy. J Urol 2013; 190(1): 149\u2013156. https:\/\/doi.org\/10.1016\/j.juro.2013.01.047","DOI":"10.1016\/j.juro.2013.01.047"},{"key":"e_1_3_2_9_2","doi-asserted-by":"crossref","unstructured":"Ayranci A Erbin A Caglar U et al. Comparison of CROES Guy\u2019s S.T.O.N.E. and S-ReSC nephrolithometric scoring systems in predicting success and complications in patients undergoing supine mini percutaneous nephrolithotomy. Urolithiasis 2024; 52(1): 147. https:\/\/doi.org\/10.1007\/s00240-024-01642-8","DOI":"10.1007\/s00240-024-01642-8"},{"key":"e_1_3_2_10_2","doi-asserted-by":"crossref","unstructured":"Yanaral F Ozgor F Savun M et al. Comparison of CROES S.T.O.N.E. and Guy\u2019s scoring systems for the prediction of stone-free status and complication rates following percutaneous nephrolithotomy in patients with chronic kidney disease. Int Urol Nephrol 2017; 49(9): 1569\u20131575. https:\/\/doi.org\/10.1007\/s11255-017-1631-x","DOI":"10.1007\/s11255-017-1631-x"},{"key":"e_1_3_2_11_2","doi-asserted-by":"crossref","unstructured":"Ozgor F Yanaral F Savun M et al. Comparison of STONE CROES and Guy\u2019s nephrolithometry scoring systems for predicting stone-free status and complication rates after percutaneous nephrolithotomy in obese patients. Urolithiasis 2018; 46: 471\u2013477. https:\/\/doi.org\/10.1007\/s00240-017-1003-0","DOI":"10.1007\/s00240-017-1003-0"},{"key":"e_1_3_2_12_2","doi-asserted-by":"crossref","unstructured":"Haldar B Sarkar D Chatterjee S et al. A prospective comparative evaluation of preoperative stone scoring systems with respect to stone free rate and complications in percutaneous nephrolithotomy. Urol J 2023; 90(3): 527\u2013534. https:\/\/doi.org\/10.1177\/03915603221141170","DOI":"10.1177\/03915603221141170"},{"key":"e_1_3_2_13_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.ucl.2006.03.003"},{"key":"e_1_3_2_14_2","doi-asserted-by":"crossref","unstructured":"Bag S Kumar S Taneja N et al. One week of nitrofurantoin before percutaneous nephrolithotomy significantly reduces upper tract infection and urosepsis: a prospective controlled study. Urology 2011; 77(1): 45\u201349. https:\/\/doi.org\/10.1016\/j.urology.2010.03.025","DOI":"10.1016\/j.urology.2010.03.025"},{"key":"e_1_3_2_15_2","doi-asserted-by":"crossref","unstructured":"Choudhury S Patel P Kundu G et al. Prospective comparative analysis of supine versus prone percutaneous nephrolithotomy in patients with complex renal stone disease and difficult anatomy. Urol Res Pract 2024; 50(2): 107\u2013114. https:\/\/doi.org\/10.5152\/tud.2024.24010","DOI":"10.5152\/tud.2024.24010"},{"key":"e_1_3_2_16_2","doi-asserted-by":"crossref","unstructured":"Vicentini FC Marchini GS Mazzucchi E et al. Utility of the Guy\u2019s stone score based on computed tomographic scan findings for predicting percutaneous nephrolithotomy outcomes. Urology 2014; 83: 1248\u20131253. https:\/\/doi.org\/10.1016\/j.urology.2013.12.041","DOI":"10.1016\/j.urology.2013.12.041"},{"key":"e_1_3_2_17_2","doi-asserted-by":"crossref","unstructured":"Matlaga BR Hyams ES. Stones: can the Guy\u2019s stone score predict PNL outcomes? Nat Rev Urol 2011; 8: 363\u2013364. https:\/\/doi.org\/10.1038\/nrurol.2011.90","DOI":"10.1038\/nrurol.2011.90"},{"key":"e_1_3_2_18_2","doi-asserted-by":"crossref","unstructured":"Yarimoglu S Bozkurt IH Aydogdu O et al. External validation and comparisons of the scoring systems for predicting percutaneous nephrolithotomy outcomes: a single center experience with 506 cases. J Laparoendosc Adv Surg Tech A 2017; 27(12): 1284\u20131289. https:\/\/doi.org\/10.1089\/lap.2017.0355","DOI":"10.1089\/lap.2017.0355"},{"key":"e_1_3_2_19_2","doi-asserted-by":"crossref","unstructured":"Singla A Khattar N Nayyar R et al. How practical is the application of percutaneous nephrolithotomy scoring systems? Prospective study comparing Guy\u2019s Stone Score S.T.O.N.E. Score and the Clinical Research Office of the Endourological Society (CROES) nomogram. Arab J Urol 2017; 15: 7\u201316. https:\/\/doi.org\/10.1016\/j.aju.2016.11.005","DOI":"10.1016\/j.aju.2016.11.005"}],"container-title":["Urologia Journal"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/03915603261465321","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/full-xml\/10.1177\/03915603261465321","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/03915603261465321","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,8,5]],"date-time":"2026-08-05T14:21:07Z","timestamp":1785939667000},"score":1,"resource":{"primary":{"URL":"https:\/\/journals.sagepub.com\/doi\/10.1177\/03915603261465321"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,8,3]]},"references-count":18,"alternative-id":["10.1177\/03915603261465321"],"URL":"https:\/\/doi.org\/10.1177\/03915603261465321","relation":{},"ISSN":["0391-5603","1724-6075"],"issn-type":[{"value":"0391-5603","type":"print"},{"value":"1724-6075","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,8,3]]},"article-number":"03915603261465321"}}