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. Author manuscript; available in PMC: 2015 Apr 6.
Published in final edited form as: Eur J Cardiovasc Nurs. 2012 Mar 28;11(2):197–206. doi: 10.1177/1474515111435605

Table 4.

KCCQ test–retest reliability using paired t-test and intraclass correlation (ICC) coefficient

Means
 ICC
Baseline 6 month Difference (6 month–baseline) p-valuea
Social Interference 65.25 69.48 4.23 0.005 0.82
Physical Limitations 60.54 61.84 1.30 0.427 0.85
Symptoms 68.69 70.57 1.87 0.066 0.81
Independent Care 92.31 92.70 0.39 0.783 0.47
Self-efficacy 88.43 90.29 1.86 0.056 0.66
a

Two-tailed p-value is baseline vs. 6 months.