Version Of Asthma Control Test Research Articles

Erratum to: The validation of the Turkish version of Asthma Control Test

Erratum to: The validation of the Turkish version of Asthma Control Test

The validation of the Turkish version of Asthma Control Test

Current guidelines focus more on levels of asthma control than on severity of asthma. The original version of the Asthma Control Test (ACT), a self-administered instrument to determine asthma control levels, was designed for English-speaking patients. More recently, the ACT has been translated into many languages and has been validated for many cultures, but this is the first study to evaluate the Turkish version. We aimed to evaluate the reliability, validity, and responsiveness of the Turkish version of the ACT among outpatients with asthma. This multicenter prospective study included 220 asthma patients in outpatient clinics in Turkey. The ACT was completed at admission (Visit 1), after 10 ± 2 days (Visit 2), and at 5 ± 1 weeks (Visit 3). At each visit, physicians assessed patients' asthma control levels. The Turkish version of the ACT showed an internal consistency reliability of 0.84 (Cronbach's alpha). Test-retest reliability was 0.85 in stable patients. There was a significant correlation between the ACT and physicians' assessments at admission (r = 0.68, p < 0.001). The AUC was 0.91, with a sensitivity of 89.06% and a specificity of 78.26% for a score of ≤19 for screening "uncontrolled" asthma. A minimally important difference of three points on the ACT was consistent with the GINA physician assessment scores between the baseline and the follow-up visits. The Turkish version of the ACT is a valid and reliable tool for assessing asthma control in patients in outpatient settings. The test may facilitate the designation of asthma patients' symptoms as either controlled or uncontrolled.

Correlation between the Korean Version of Asthma Control Test and Health-Related Quality of Life in Adult Asthmatics

The Asthma Control Test (ACT) is a patient-completed questionnaire developed to assess asthma control. Health-related quality of life (HRQL) in asthmatics has shown relatively low correlations with parameters of asthma control and the relationship between the ACT and HRQL in asthmatics is yet unclear. Because revalidations of translated versions of questionnaires are critical for its utilization, we first sought to validate the Korean version of ACT and then to evaluate the relationship between the ACT and HRQL. Patients (n=117) completed the ACT and asthma-related quality of life questionnaire (AQLQ) at 3 physician visits. Pulmonary function was measured and an asthma specialist rated asthma control. The Korean version of ACT was found to be reliable, valid, and responsive to changes in asthma control over time up to three consecutive visits. ACT scores correlated significantly (p=0.001) with symptoms domain (r=0.72), activity domain (r=0.65), emotional domain (r=0.69), and environmental domain (r=0.67) of AQLQ. In conclusion, the Korean version of the ACT was found to be a reliable and valid tool for measuring asthma control, and to correlate well with AQLQ scores. Moreover, the ACT was responsive to changes in AQLQ scores over time.