title: [Nonagenarian patients admitted to Spanish internal medicine hospital departments].
abstract: OBJECTIVE
  To describe the demographic and clinical profile of nonagenarian patients admitted to Internal Medicine departments in Spanish hospitals, and to compare it with younger patients.
  
  
  METHODS
  We identified, through the MBDS (Basic Minimum Data Set), every patient older than 90 years admitted to Internal Medicine Departments of the Spanish National Health Service public hospitals between 2005- 2008. Hospital discharge data were obtained from the MBDS. A diagnosis-related group (DRG) was identified for every patient. The DRG 21.0 version was used. We compared this nonagenarian group with data of younger adult people. All centres submit this information to the Spanish Health Ministry. The Charlson Index (CCI) was used to determine comorbidity. All statistical analyses were performed using SPSS 14.0.
  
  
  RESULTS
  The sample included 131,434 patients over 90 years (6% of total patients admitted), with 2,222 patients being over 100 years. There were 45.3% female patients under 90 years, compared to 67.3% over 90 years (P<.001). The top ten DRGs listed in the older group included three new conditions not present in the younger one: pulmonary oedema (DRG: 87), severe urinary tract infection (DRG: 320), and severe respiratory tract infection (DRG: 540). The first 5 DRG were: pneumonia/bronchitis (541): 11.9%, heart failure (127): 8.9%, rhythm disorders (544): 7.5%, pulmonary oedema (87): 3.8%, and other respiratory diseases (89): 3.24%. In any case the incidence of these conditions was higher than those found in younger patients. Among this top ten, only COPD and angina had a higher rate in the younger group. The incidence of hospital deaths were 9.1% among the younger group, and 21.8% among the nonagenarians (P<.001). If only the first 48 hours after admission are taken into account, the rates were 2.2% vs 6% (P<.001). The majority (78.2%) of nonagenarian patients return home after discharge
  
  
  CONCLUSIONS
  1) There are a high number of nonagenarians patients admitted in hospital Internal Medicine Departments; 2) The number of women increases with age; 3) List of diagnosis varies according with age; 4) Hospital death rates increase with age, both in first two days and total stay, and 5) The majority of these patients are able to return home after discharge.
authors.affiliation: Servicios de Geriatría y de Medicina Interna, Hospital Clínico San Carlos, Madrid, Spain. mlazaro.hcsc@salud.madrid.org
authors.forename: Montserrat
authors.initials: M
authors.lastname: Lázaro
authors.forename: Javier
authors.initials: J
authors.lastname: Marco
authors.forename: Raquel
authors.initials: R
authors.lastname: Barba
authors.forename: Jose Manuel
authors.initials: JM
authors.lastname: Ribera
authors.forename: Susana
authors.initials: S
authors.lastname: Plaza
authors.forename: Antonio
authors.initials: A
authors.lastname: Zapatero
mesh_terms: D000369:Aged, 80 and over; D005260:Female; D005853:Geriatrics; D006748:Hospital Departments; D006760:Hospitalization / Q000706:statistics & numerical data*; D006801:Humans; D007388:Internal Medicine; D008297:Male; D013030:Spain