VO2max-Based Physical Fitness Categories in a Brazilian Population with Supposed High Socioeconomic Status and without Structural Heart Disease

Abstract Background The most widely used data for cardiorespiratory fitness (CRF) referrals are from the Cooper Clinic, which uses calculated maximal oxygen uptake (VO2max) values. Objective To develop CRF values from cardiopulmonary exercise testing (CPX) in a Brazilian population with high socioeconomic level and free of structural heart disease. VO2max testing results were compared with the Cooper Clinic and FRIEND Registry data. Methods CPX data from consecutive individuals between January 1,2000, and May 31,2016 were used in this study. Inclusion criteria were: VO2max by a pre-specified definition. We built a CRF chart according to VO2max percentiles: very poor (≤20%), poor (20-40%), fair (40-60%), good (60-80%), excellent (80-90%), and superior (≥90%). Kappa correlation was used to analyze our data in comparison with that of the other two databases. Statistical tests with p【研究背景】目前用于心肺适能（cardiorespiratory fitness, CRF）转诊的最常用数据来自库珀诊所，该机构采用计算得到的最大摄氧量（maximal oxygen uptake, VO2max）数值。 【研究目的】针对社会经济水平较高且无结构性心脏病的巴西人群，基于心肺运动试验（cardiopulmonary exercise testing, CPX）推导CRF相关数值，并将所得VO2max检测结果与库珀诊所及FRIEND登记库的数据进行对比。 【研究方法】本研究纳入2000年1月1日至2016年5月31日期间的连续受试者心肺运动试验数据。纳入标准为采用预设定义测定VO2max。本研究依据VO2max百分位数构建CRF分级表：极差（≤20%）、较差（20%~40%）、一般（40%~60%）、良好（60%~80%）、优秀（80%~90%）及卓越（≥90%）。采用Kappa相关性分析，将本研究数据与另外两个数据库的数据进行对比。采用统计学检验，P值