title: Effects of cardiorespiratory fitness on healthcare utilization.
abstract: BACKGROUND
  Prospective study examining the relationship between cardiorespiratory fitness level and incidence of medical treatments during a 1-yr period before each of two examinations. A subset was also evaluated to assess whether improvement in fitness affected incidence of treatments.
  
  
  RESULTS
  Part I: Six thousand six hundred seventy-nine healthy male subjects underwent medical examinations on two occasions, including a maximal exercise test. Division of subjects by fitness into quartiles (Q1 = low fitness through Q4 = high fitness) revealed an inverse relationship between fitness and outcome measures. Men in the low-fitness group had more office visits and overnight hospital stays than men in the high-fitness group (3.5% (Q1) vs 1.6% (Q4) men had 10+ office visits, and 10% (Q1) vs 5.0% (Q4) men had overnight hospital stays, P < 0.0001). These differences held after adjustment for potential confounding variables (age, follow-up yr, blood pressure, cholesterol, and smoking). Part II: Subjects in this subset (N = 2974) were evaluated to compare overnight hospital stays between low-fit men who remained low fit at the second examination, and low-fit men who became fit by the second examination. This cohort was divided into fitness tertiles (T1 = low fitness through T3 = high fitness). Those who improved their fitness by the time of the second examination had a decreased number of overnight hospital stays, compared with those who remained unfit at the time of the second examination (10.2% (T1 at second visit) vs 5.9% (T3 at second visit) had overnight hospital stays, P < 0.03).
  
  
  CONCLUSIONS
  Men who maintain or become fit are less likely to have physician visits or overnight hospital stays, compared with men who are unfit.
authors.affiliation: Cooper Clinic, 12200 Preston Rd., Dallas, TX 75230, USA. tlmitchell@cooper-clinic.com
authors.forename: Tedd L
authors.initials: TL
authors.lastname: Mitchell
authors.forename: Larry W
authors.initials: LW
authors.lastname: Gibbons
authors.forename: Susan M
authors.initials: SM
authors.lastname: Devers
authors.forename: Conrad P
authors.initials: CP
authors.lastname: Earnest
mesh_terms: D000328:Adult; D015331:Cohort Studies; D005080:Exercise Test; D006296:Health Services / Q000706:statistics & numerical data*; D006304:Health Status; D006760:Hospitalization / Q000706:statistics & numerical data; D006801:Humans; D008297:Male; D008875:Middle Aged; D010809:Physical Fitness; D011446:Prospective Studies