title: [Obtaining a formula that improves maximum oxygen consumption estimation in cycle ergometer exercise tests].
abstract: OBJECTIVE
  To evaluate if the estimation of the maximal oxygen consumption (MO2C) in METs (metabolic equivalents) by means of the table proposed in the guidelines of the Spanish Society of Cardiology is a sufficiently reliable method when applied to the bicycle exercise test.
  
  
  METHODS
  The MO2C in METs was obtained by gas-exchange analysis on bicycle ergometer tests in 97 healthy subjects (group i). It was compared with the estimate of METs using the table in which only watts and patient's weight were included. A better-adjusted formula was validated in 289 subjects with normal exercise myocardial perfusion gated-SPECT (group ii) using the introduction of clinical and ergometric variables.
  
  
  RESULTS
  In group i individuals a good correlation between METs estimated with the table and those obtained through gas-exchange analysis (CCI: 0.93) was observed. However, the best adjusted formula to estimate METs in group ii subjects included watts, body mass index (BMI), age and gender (METS=11.820-0.054×age-0.189×BMI+1.031×gender+0.020×watts) (women: 0, men: 1). This formula allowed the reclassification of 46.9% of group ii subjects into the category <5METs versus the estimation by table.
  
  
  CONCLUSIONS
  Estimating the METs with the conventional table is reliable. However, the best adjustment in subjects with normal bicycle exercise SPECT was obtained when, in addition to watts and BMI, age and gender were also considered.
authors.affiliation: Servicio de Cardiología, Hospital Universitari Vall d'Hebron, Institut de Recerca (VHIR), Universitat Autònoma de Barcelona, Barcelona, España.
authors.forename: G
authors.initials: G
authors.lastname: Romero-Farina
authors.affiliation: Servicio de Cardiología, Hospital Universitari Vall d'Hebron, Institut de Recerca (VHIR), Universitat Autònoma de Barcelona, Barcelona, España.
authors.forename: J
authors.initials: J
authors.lastname: Candell-Riera
authors.affiliation: Servicio de Neumología, Hospital Universitari Vall d'Hebron, Institut de Recerca (VHIR), Universitat Autònoma de Barcelona, Barcelona, España.
authors.forename: J M
authors.initials: JM
authors.lastname: Bofill
authors.affiliation: Servicio de Medicina Nuclear, Hospital Universitari Vall d'Hebron, Institut de Recerca (VHIR), Universitat Autònoma de Barcelona, Barcelona, España. Electronic address: saguade@vhebron.net.
authors.forename: S
authors.initials: S
authors.lastname: Aguadé-Bruix
authors.affiliation: Servicio de Cardiología, Hospital Universitari Vall d'Hebron, Institut de Recerca (VHIR), Universitat Autònoma de Barcelona, Barcelona, España.
authors.forename: M N
authors.initials: MN
authors.lastname: Pizzi
authors.affiliation: Servicio de Cardiología, Hospital Universitari Vall d'Hebron, Institut de Recerca (VHIR), Universitat Autònoma de Barcelona, Barcelona, España.
authors.forename: D
authors.initials: D
authors.lastname: García-Dorado
mesh_terms: D000328:Adult; D000368:Aged; D000465:Algorithms; D015992:Body Mass Index; D055426:Cardiac-Gated Single-Photon Emission Computer-Assisted Tomography; D005080:Exercise Test; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010101:Oxygen Consumption; D011446:Prospective Studies; D011659:Pulmonary Gas Exchange; D016037:Single-Blind Method
keywords: Estimación del consumo de oxígeno; Gated-SPECT; MET; METs; Maximal oxygen consumption; Prueba de esfuerzo; Stress test