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Table 6 Mean and range of MCID estimates for SGRQ-Ider domains based on change in anchors from baseline to 12 months

From: Validation of a derived version of the IPF-specific Saint George’s Respiratory Questionnaire

Domains

Improvement

Deterioration

Mean

Range

Mean

Range

SGRQ-Ider total

3.5

2.9–4.5

5.7

4.7–6.6

SGRQ-Ider symptoms

7.9

7.5–8.2

3.9

1.7–5.3

SGRQ-Ider activities

10.2

10.0–10.9

9.6

9.5–9.6

SGRQ-Ider impacts

1.2

0.3–2.8

4.1

2.3–5.8

  1. MCID: Minimal clinically important difference; SGRQ-Ider: IPF-specific version of the St. George’s Respiratory Questionnaire derived from results from the original St. George’s Respiratory Questionnaire