title: [Prevalence of chronic kidney disease in hypertensive persons attended in primary care from Spain determined by application of estimating equations].
abstract: BACKGROUND
  To study the renal function (FR) of the hypertensive patients by means of estimating equations and serum creatinine (Crp). To calculate the percentage of patients with chronic kidney disease (ERC) that present normal values of Crp. To analyze which factors collaborate in the deterioration of the FR.
  
  
  METHODS
  Descriptive cross-sectional study of patients with HTA. Crp and arterial tension (TA) were determined. The glomerular filtration rate was calculated by means of Cockroft-Gault and MDRD's formula. The years of evolution of the HTA were registered. A descriptive study of the variables and the possible dependence among them was completed, using several times linear multiple regression.
  
  
  RESULTS
  52 patients were studied (57,7% women). Average age 72,4 +/- 10,8. 32,6% (Cockcroft-Gault) or 21,5% (MDRD) were fulfilling ERC criterion. The ERC was mainly diagnosed in females. 21,4% (Cockcroft-Gault) and 9,5 % patients (MDRD) with ERC had normal Crp values. We do not find linear dependence between the numbers of TA and the FR. The TA check-up objectives do not suppose less development of ERC. In males we find linear dependence within the FR (MDRD) and the years of evolution of the HTA.
  
  
  CONCLUSIONS
  The ERC is a frequent pathology in the hypertense persons. The systematical utilization of estimating equations facilitates the detection of hidden ERC in patients with normal Crp.
authors.affiliation: Equipo de Atención Primaria Teruel Rural, Consejería de Sanidad de Aragón. ragona@ya.com
authors.forename: Rafael
authors.initials: R
authors.lastname: Gómez Navarro
mesh_terms: D000368:Aged; D002908:Chronic Disease; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D006973:Hypertension / Q000150:complications*; D007674:Kidney Diseases / Q000150:complications* / Q000453:epidemiology*; D008297:Male; D008433:Mathematics; D015995:Prevalence; D011320:Primary Health Care; D013030:Spain