Comparison of health-related quality of life measurements using a single value in patients with asthma and chronic obstructive pulmonary disease.

Three methods have been developed to measure health-related quality of life (HRQoL) expressed as a single value: the global rating scale, the total score obtained from disease-specific instruments, and the preference-based utility index. We compared these different single HRQoL measurements in patients with asthma and chronic obstructive pulmonary disease… CONTINUE READING