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Table 1 Operationalisation of survey statements

From: The development of an arm activity survey for breast cancer survivors using the Protection Motivation Theory

Theory construct Appraised by Survey statements
Perceived Threat of lymphoedema Perceived severity of lymphoedema ■ Having arm swelling would or does significantly alter my lifestyle
■ Arm swelling is a minor side-effect
■ People with arm swelling suffer a lot
■ Swelling in the arm can look very severe
■ The possibility of developing or worsening arm swelling worries me
  Perceived vulnerability to lymphoedema ■ I am not at risk of developing or worsening arm swelling
■ My chances of developing or worsening arm swelling is low
■ People who have had the same breast cancer treatment as me are vulnerable to arm swelling
■ It is unlikely that swelling will occur or worsen in my arm
Perceived coping by the response of protecting arm Perceived response efficacy ■ Arm swelling is inevitable and there is little anyone can do to prevent it
■ Doing strenuous activities with my affected arm puts me at risk of developing or worsening arm swelling.
■ Repetitive arm activities will not cause arm swelling
■ Resting my affected arm will increase my chances of developing or worsening arm swelling
  Perceived self-efficacy ■ I am confident in my ability to avoid strenuous work
■ Strenuous work is part of my lifestyle so I must do it regardless of any advice given
■ I will rest and protect my affected arm even though it may be inconvenient
Perceived threat of musculoskeletal symptoms Perceived severity of musculoskeletal symptoms ■ My quality of life will be reduced if arm weakness or restriction developed following breast cancer treatment
■ I will be happy to live with limited shoulder range as a result of breast cancer treatment
■ Arm swelling or restriction does not worry me as much as arm swelling does.
  Perceived vulnerability to musculoskeletal symptoms ■ Other people who had the same surgery as me have problems with shoulder restriction
■ I may get arm weakness following breast cancer treatment
■ Stiff shoulders are not common after breast cancer treatment
Perceived coping by the response of performing strenuous arm exercise Perceived response efficacy ■ Doing strenuous arm exercises will help me gain arm strength and prevent weakness
■ In my opinion, you must exercise the arm strenuously to achieve full shoulder range
  Perceived self-efficacy ■ I can quite easily perform a strenuous exercise routine to strengthen and stretch my arm muscles
■ I am confident in doing a strenuous exercise routine by myself
Perceived norms of arm protection versus strenuous arm exercises Perceived norms of arm protection versus strenuous arm exercises ■ Health professionals have told me to be protective of my arm and avoid strenuous arm work
■ My family and friends have told me to rest my arm
■ Health professionals approve of strenuous arm exercises
Intention The intention to engage in arm protective behaviours ■ I plan to avoid any strenuous arm activities
■ I plan to protect my arm in any way possible so as not to develop or worsen arm swelling
■ I use my arm more cautiously now compared to before my breast cancer interventions
  The intention to engage in strenuous arm exercises ■ I plan to do strenuous arm exercise
■ I plan to do lighter, easier arm exercises
■ It is important for me to return to using my arm the same way as I would have before breast cancer treatment