Test–retest reliability for the Swedish Dyspnoea-12
| Dyspnoea-12 | Q1 vs Q2 ICC (95% CI) | Q1 vs Q3 ICC (95% CI) | Q2 vs Q3 ICC (95% CI) |
| Dyspnoea-12 total score | 0.89 (0.80 to 0.93) | 0.81 (0.70 to 0.88) | 0.84 (0.74 to 0.91) |
| Dyspnoea-12 physical domain score | 0.89 (0.83 to 0.92) | 0.78 (0.67 to 0.86) | 0.87 (0.79 to 0.92) |
| Dyspnoea-12 affective domain score | 0.81 (0.68 to 0.88) | 0.75 (0.62 to 0.84) | 0.77 (0.65 to 0.86) |
Test–retest reliability was evaluated using ICCs of Dyspnoea-12 total and subdomain scores, in patients who reported unchanged level of breathlessness during follow-up. The test–retest reliability at Q3 was compared between the Q1 and Q2 assessments to evaluate a potential learning effect.
ICCs, intraclass coefficients; Q1, baseline; Q2, after 30–90 min; Q3, after 2 weeks.