Skip to main content
. 2021 May 3;16:1215–1226. doi: 10.2147/COPD.S295835

Table 3.

Ordered OR of GADS Improvement on the 7-Point Likert Scale at Week 4

GADS Response at Week 4, n (%) Number of PRO Responsesa at Week 4
No CII at Week 4 (n=1100) CII at Week 4 (N=1210) 0 (n=407) 1 (n=693) 2 (n=579) 3 (n=433) 4 (n=198)
Much Better 17 (2) 85 (7) 2 (<1) 15 (2) 17 (3) 31 (7) 37 (19)
Better 68 (6) 308 (25) 9 (2) 59 (9) 107 (18) 121 (28) 80 (40)
Slightly Better 332 (30) 562 (46) 83 (20) 249 (36) 264 (46) 225 (52) 73 (37)
No Change 509 (46) 215 (18) 213 (52) 296 (43) 158 (27) 50 (12) 7 (4)
Slightly Worse 140 (13) 37 (3) 74 (18) 66 (10) 31 (5) 5 (1) 1 (<1)
Worse 28 (3) 3 (<1) 21 (5) 7 (1) 2 (<1) 1 (<1) 0
Much Worse 6 (<1) 0 5 (1) 1 (<1) 0 0 0
OR of better responseb vs no CII (95% CI) 5.56 (4.69, 6.58); p<0.001
OR of better responseb vs 0 PRO responses (95% CI) 2.91 (2.30, 3.69); p<0.001 6.67 (5.18, 8.61); p<0.001 15.96 (12.07, 21.10); p<0.001 42.07 (29.58, 59.83); p<0.001

Notes: aA PRO response was defined as meeting the MCID for SAC-TDI, E-RS, CAT or SGRQ scores; bImprovement in GADS was defined as a patient reporting a GADS response of Slightly Better, Better or Much Better at Week 4.

Abbreviations: CAT, COPD Assessment Test; CI, confidence interval; CII, clinically important improvement; COPD, chronic obstructive pulmonary disease; E-RS, Evaluating Respiratory Symptoms:COPD; GADS, Global Assessment of Disease Severity; MCID, minimal clinically important difference; OR, odds ratio; PRO, patient-reported outcome; SAC-TDI, self-administered computerized-Transition Dyspnea Index; SGRQ, St George’s Respiratory Questionnaire.