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Table 2 Known-group validity at T2 and T3

From: How does the EQ-5D-5L perform in asthma patients compared with an asthma-specific quality of life questionnaire?

Cohen’s d ACT A vs. ACT-BACT B vs. ACT-C
T2AQLQ1.480.74
 EQ-5D index0.720.73
 VAS0.970.57
T3AQLQ1.251.35
 EQ-5D index0.750.63
 VAS1.330.70
  1. Abbreviations: AQLQ Asthma Quality of Life Questionnaire, VAS Visual Analog Scale, ACT Asthma Control Test, ACT-A well-controlled asthma (ACT score > 19), ACT-B not well-controlled asthma (16–19), and ACT-C very poorly controlled asthma (5–15)