Predictors of initial and final work capacity in a chronic obstructive airways disease rehabilitation program

A study was conducted to determine the predictors of initial and final work capacity in men with chronic obstructive airways disease attending an outpatient rehabilitation program in a veterans' hospital. Baseline psychological, ergometric and respiratory physiological data were collected on a sample of 27 patients and ergometric and physiological data were collected again after eight weeks. The study demonstrated that respiratory impairment as measured by vital capacity was predictive of initial work capacity and that knowledge of the patients' psychological state added little to this prediction. In addition, it demonstrated that work capacity could be improved considerably by such a rehabilitation program despite a lack of improvement in respiratory parameters. Such improvement in work capacity as did occur was greatest for those who were less affectively disturbed, had a more positive general psychological state, were less preoccupied with their symptoms and saw their problems as being more under their control.