SF2 response at 24-week follow-up | AUC (95% CI)^{¶} | |||||

Much better | Somewhat better | About the same | Somewhat worse^{#} | Much worse | ||

Subjects n | 7 | 12 | 46 | 58 | 9 | |

Physiological measures | ||||||

Δ6MWD m | −3.71±42.33 | −35.08±144.51 | −32.29±95.46 | −74.89±69.32 | −163.00±122.93 | 0.72 (0.61–0.83) |

Data are presented as mean±sd, unless otherwise stated. AUC: area under the curve; Δ: absolute change over 24 weeks; 6MWD: 6-min walk distance. ^{#}: the mean change in scores in the “somewhat worse” category is the minimal clinically important difference value for measures that meet the responsiveness criteria; ^{¶}: receiver operating curve comparing dichotomous health transition question (SF2) response (“about the same” *versus* “somewhat worse”) with mean change score of variable.