A New Measure to Assess Asthma's Impact on Quality of Life from the Patient's Perspective (original) (raw)

The Asthma Impact on Quality of Life Scale (A-IQOLS) assesses the negative effect of asthma on quality of life (QoL) from the patient's perspective, using dimensions of Flanagan's Quality of Life Scale (QOLS), a measure of current QoL. To determine and compare the psychometric properties of the A-IQOLS and QOLS, including their sensitivities to differences and changes in asthma status. In a test-retest design (3-5 week interval), adults with persistent asthma underwent spirometry and were administered the A-IQOLS, other asthma outcome measures (ACT, ASUI, Marks and Juniper AQLQs), and QOLS. Participants' (n = 147) mean age was 49 yrs.; 76% were White; 12% Hispanic; 65% female. A-IQOLS and QOLS scores were significantly correlated with other asthma outcomes scores except FEV1, but shared relatively low common variance with these measures. A-IQOLS, but not QOLS, score changes were significantly correlated with changes in asthma outcomes. The A-IQOLS SEM = 0.27 implies that...