| Instrument/Outcome | Range (points) | Final score | Threshold |
|---|---|---|---|
| ACT | 5 to 25 | Well-controlled: ≥20 Not well-controlled: ≤19 | ≥12 y: Δ 3 points1 |
| ACQ5, ACQ6 | 0 to 6 | Uncontrolled: ≥1.5 Well-controlled: <0.75 | ≥18 y: Δ 0.5 points2 |
| ACQ7 | 0 to 6 | Uncontrolled: ≥1.5 Well-controlled: <0.75 | ≥6 y: Δ 0.5 points2,3 |
| AQLQ, AQLQ(S), AQLQ-mini | 1 to 7 | Severe impairment = 1 No impairment= 7 | ≥18 y: Δ 0.5 points4–6 |
| AQLQ12+ | 1 to 7 | Severe impairment = 1 No impairment= 7 | ≥12 y: Δ 0.5 points7,8 |
| PAQLQ, PACQLQ | 1 to 7 | Severe impairment = 1 No impairment= 7 | 7–17 y: Δ 0.5 points9,10 |
| FEV1 | Continuous measure, L | NA | ≥18 y: −0.2 L11 |
| Rescue medication use | Continuous measure, puffs per unit of time | NA | ≥18 y: −0.81 puffs/day11 |
From: Appendix E, Minimally Important Differences
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