Shannon van Hoorn

152 Chapter 5 Table S3: Overview of the skewness, inter-item correlation and reliability of the SF-36v2 in adults with von Willebrand disease. Score Correlation Reliability Instruments N No. of items Mean SD Skew Min Max α GLB SF-36v2 Physical functioning 63 10 71.0 28.9 -0.97 0.31 0.82 0.94 0.98 Role limitations due to physical health problems 63 4 92.1 23.2 -3.13 0.46 0.78 0.88 0.93 Role limitations due to emotional problems 63 3 94.7 21.8 -3.95 0.86 - 0.96 0.96 Vitality 63 4 62.1 16.9 -0.04 0.40 0.65 0.82 0.89 Mental health 63 5 71.0 13.2 -0.80 0.30 0.73 0.85 0.92 Social functioning 63 2 78.6 24.6 -1.15 0.67 - 0.80 0.80 Bodily pain 63 2 70.9 27.0 -0.55 0.83 - 0.91 0.91 General health 63 5 58.5 25.0 -0.76 0.39 0.76 0.87 0.91 Physical component score 63 21 46.0 10.6 -0.56 0.36 0.68 0.83 0.86 Mental component score 63 14 51.5 6.2 -1.03 0.29 0.66 0.77 0.85 Abbreviations: α, Cronbach’s alpha; GLB, greatest lower bound; Max, maximum; Min, minimum; No, number; SD, standard deviation; SF-36v2, Short Form-36 version 2.

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