Table 2

Principal components analysis with varimax rotation of the 12-item set

ItemComponent 1 “Physical”Component 2 “Affect”
My breath does not go in all the way0.811
My breathing requires more work0.7150.333
I feel short of breath0.7130.313
I have difficulty catching my breath0.6960.320
I cannot get enough air0.6880.398
My breathing is uncomfortable0.6530.456
My breathing is exhausting0.5780.479
My breathing makes me feel depressed0.834
My breathing makes me feel miserable0.821
My breathing is distressing0.3570.725
My breathing makes me agitated0.4880.658
My breathing is irritating0.5080.530
  • Items were allocated to a component if they loaded >0.5, as per figures highlighted in bold.