Table 2

Principal component analysis to determine the scale structure

ItemsPrincipal componentsSubscale names
1234
10Fatigue/tiredness0.2590.6040.1020.200Social impact
15Appearance changes0.2250.2170.1840.840Impact on appearance
16Clothes not fitting0.1930.2230.1710.867Impact on appearance
20Anger/irritation0.6750.2480.1710.184Psychological impact
23Anxiety0.7140.3120.176Psychological impact
24Physical agitation0.7810.2540.133Psychological impact
26Clarity of thinking0.5270.4270.1870.141Psychological impact
27Talking too much0.7490.1070.144Psychological impact
28Feeling upset0.2970.1530.7930.227Treatment concerns
29Extra medications0.1690.1930.8210.200Treatment concerns
30Long-term risks0.1280.1800.8010.184Treatment concerns
31Worrying about weight0.2250.4040.698Impact on appearance
38Everyday responsibilities0.2200.7610.1830.187Social impact
39Being with other people0.1940.7320.1600.179Social impact
40Joining in0.2290.8420.1680.144Social impact
  • The four subscales are illustrated by colour: Social impact (orange), Impact on appearance (blue), Psychological impact (yellow) and Treatment concerns (green).

  • For each item, the component demonstrating the highest loading with principal component analysis is shown in bold.