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Table 3 Interview Comments indicating Variable Interpretations of Pain Interference

From: Individuals with knee impairments identify items in need of clarification in the Patient Reported Outcomes Measurement Information System (PROMIS®) pain interference and physical function item banks – a qualitative study

Item

Item text

Interview comments

PAININ31

How much did pain interfere with your ability to participate in social activities?

“The interference is more with my CPM, crutches, and brace than to do with true pain.”

PAININ53

How often did pain restrict your social life to your home?

“My lack of mobility is more pertinent when it comes to restricting my social life to home.”

PAININ56

How irritable did you feel because of pain?

“In addition to pain, my knees would give out. I would fall and was very irritable and frustrated. I would lash out at simple things due to frustration.”