Table 6 Principal component analysis (PCA) showing first component loadings for individual items of the PREE

Pain - When it is at its worst^a

Pain - At rest

Pain - When lifting a heavy object^a

Pain - When doing a task with repeated elbow movement^a

How often do you have pain?^a

Comb my hair^a

Eat with a fork or spoon^a

Pull a heavy object

Use my arm to rise from a chair

Carry a 10 lb object with my arm at my side

Throw a small object, such as a tennis ball

Use a telephone^a

Do up buttons on the front of my shirt^a

Wash my opposite armpit^a

Tie my shoe^a

Turn the doorknob and open a door

Personal activities (dressing, washing)

Household work (cleaning, maintenance)

Work (your job or everyday work)^a

Recreational activities^a