title: [Epidemiology of urolithiasis in south of France: A retrospective monocentric study].
abstract: BACKGROUND
  Incidence of urolithiasis is increasing in industrialized countries. Amendments can be explained among others by dietary changes. More and more young patients have urolithiasis. The objective of this study was to analyze and update the epidemiology of stones in south of France about age and gender.
  
  
  METHODS
  A retrospective single-center study from 2009 to June 2015 included all urolithiasis analyzed by infrared spectroscopy. Groups were composed according to the mineral content (oxalocalcic with whewellite and weddelite, calcium phosphate stones, uric acid stones…).
  
  
  RESULTS
  A total of 749 stones were analyzed. The sex ratio was 1.96 all aged confused. The most common stones were oxalocalcic (51.3 %), followed mixed stones (21.2 %) and calcium phosphate stones (11.9 %). The calcium oxalate stones are mainly composed of whewellite (42 %) and calcium phosphate stones of carbapatite (18.6 %). The stones of whewellite were more frequent in men (P=0.0009), as well as uric acid stones (P=0.01) and mixed stones in women (P=0.00003), as well as calcium phosphate (P=0.0005).
  
  
  CONCLUSIONS
  Epidemiology of stones has changed with an increased incidence in women, and nephrolithiasis patients getting older. A change in the type of stones is observed with increasing the proportion of mixed stones especially among women. Nutritional and metabolic studies are needed to find the etiology of the change in the epidemiology of urolithiasis.
  
  
  METHODS
  4.
authors.affiliation: Service d'urologie et de transplantation rénale, CHU Lapeyronie, 371, avenue Doyen-Gaston-Giraud, 34295 Montpellier cedex 5, France. Electronic address: olivier.menard34@hotmail.com.
authors.forename: O
authors.initials: O
authors.lastname: Menard
authors.affiliation: Service d'urologie et de transplantation rénale, CHU Lapeyronie, 371, avenue Doyen-Gaston-Giraud, 34295 Montpellier cedex 5, France.
authors.forename: T
authors.initials: T
authors.lastname: Murez
authors.affiliation: Service d'urologie et de transplantation rénale, CHU Lapeyronie, 371, avenue Doyen-Gaston-Giraud, 34295 Montpellier cedex 5, France.
authors.forename: J
authors.initials: J
authors.lastname: Bertrand
authors.affiliation: Laboratoire de biochimie, CHU Lapeyronie, 371, avenue Doyen-Gaston-Giraud, 34295 Montpellier cedex 5, France.
authors.forename: A M
authors.initials: AM
authors.lastname: Daille
authors.affiliation: Service d'urologie et de transplantation rénale, CHU Lapeyronie, 371, avenue Doyen-Gaston-Giraud, 34295 Montpellier cedex 5, France.
authors.forename: L
authors.initials: L
authors.lastname: Cabaniols
authors.affiliation: Service d'urologie et de transplantation rénale, CHU Lapeyronie, 371, avenue Doyen-Gaston-Giraud, 34295 Montpellier cedex 5, France.
authors.forename: M
authors.initials: M
authors.lastname: Robert
authors.affiliation: Service d'urologie et de transplantation rénale, CHU Lapeyronie, 371, avenue Doyen-Gaston-Giraud, 34295 Montpellier cedex 5, France.
authors.forename: R
authors.initials: R
authors.lastname: Thuret
mesh_terms: D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D000368:Aged; D000369:Aged, 80 and over; D002129:Calcium Oxalate; D002130:Calcium Phosphates; D002648:Child; D002675:Child, Preschool; D005260:Female; D005602:France / Q000453:epidemiology; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D017678:Sex Distribution; D014527:Uric Acid; D052878:Urolithiasis / Q000453:epidemiology*; D055815:Young Adult
chemical_list: D002130:Calcium Phosphates; D002129:Calcium Oxalate; D014527:Uric Acid; C020243:calcium phosphate
keywords: Epidemiology; Infrared spectroscopy; Lithiase urinaire; Spectrophotométrie infrarouge; Urolithiasis; Épidémiologie