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Prediction of Maximal Exercise Capacity in Obstructive and Restrictive Pulmonary Disease: Discussion (3)

There are many equations in the literature that predict VEmax from resting pulmonary function data. These have been reviewed by Carter et al. They found that the best equations were those that used a zero intercept model, and in their patient sample, the equation 37.5 X FEV, gave the best … Continue reading

Prediction of Maximal Exercise Capacity in Obstructive and Restrictive Pulmonary Disease: Discussion (2)

In the study by Mahler and Harver, stepwise multiple regression revealed that the FEV,, age, and the baseline dyspnea index were the best predictors. Whereas Mahler and Harver did not find that the Dl added to the value of the predictive equation, they found in contrast to Carlson and coworkers … Continue reading

Prediction of Maximal Exercise Capacity in Obstructive and Restrictive Pulmonary Disease: Discussion (1)

Although our study showed significant correlations between indices of expiratory airflow and exercise function in patients with COPD, the confidence intervals were wide, making individual predictions inaccurate. Moreover, stepwise multiple linear regression to include other predictive variables did not appreciably improve the estimates. Although the correlation coefficients were higher in … Continue reading

Prediction of Maximal Exercise Capacity in Obstructive and Restrictive Pulmonary Disease: Results (2)

Tables 4 and Table 5 show correlation coefficients for prediction of VEmax and Vo2max, respectively, in the three severity subsets of patients with airway obstruction. As seen previously, the measures of expiratory flow correlate most closely with measures of peak exercise capacity. Also apparent is the significantly higher r value … Continue reading

Prediction of Maximal Exercise Capacity in Obstructive and Restrictive Pulmonary Disease: Results (1)

Anthropometric and resting pulmonary function data for all obstructed, the three subsets of severity, and the patients with restrictive disease are shown in Table 1. The mean FEV,/FVC ratio ranged from 67 percent in the mild group to 35 percent in the severely obstructed group. As expected the FVC, maximum … Continue reading

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