Table 4. ICC values for clinical questionnaires.

Clinical Questionnaire	Baseline	Repeat Visit	ICC* COPD
MRC Dyspnea	1.5 ± 1.1	1.3 ± 1.0	Kappa 0.42+
Bode Index	2.5 ± 2.2	2.1 ± 1.8	0.84
COPD Assessment Test (CAT)	16.3 ± 8.5	16.2 ± 7.9	0.78
SGRQ-C Total Score	41.8 ± 21.2	40.2 ± 21.5	0.94
FACIT-F Total	111.0 ± 26.1	112.1 ± 27.3	0.91
PSQ Total Score	7.0 ± 4.2	6.9 ± 4.3	0.85
Medical Outcomes SF-12
SF-12 Gen Health	25.0 ± 11.7	26.5 ± 12.0	0.68
SF-12 Physical Functioning	21.3 ± 12.8	22.7 ± 12.5	0.63

Data are Mean ± SD

*ICC = Intraclass Correlation, COPD subjects only

⁺ Kappa Statistic was utilized because of the categorical nature of the data