Table 1.

Questionnaires administered at baseline (Time 1) and 6-month follow-up (Time 2), specifically on visit 1 to the hospital

Outcome	Questionnaire	Description	Example
Pain	McGill Pain Questionnaire	Questions pertaining to the past 2 weeks 17 items - Sensory descriptors - Affective descriptors - Present pain - Average pain	For each of these words, please place a tick in onecolumn: - E.g., Throbbing - (0 = none, to 3 = severe)
Fatigue	Multidimensional Assessment of Fatigue Scale	Questions pertaining to the past 2 weeks 16 items 4 dimensions: - E.g., Degree and severity Global fatigue index	Please complete the following items based on the past 2 weeks: - E.g., To what degree have you experienced fatigue? - (1 = not at all, to 10 = a great deal)
Fatigue	Multidimensional Fatigue Inventory	Questions pertaining to the past 2 weeks 20 items 5 dimensions: - E.g., Physical fatigue	Over the past 2 weeks: - E.g., I feel fit - (1 = yes that is true, to 5 = no that is not true)
Physical function	Health Assessment Questionnaire	Questions pertaining to the past 2 weeks 8 categories: Self-reported ability to complete activities of daily living - E.g., Dressing and Grooming	Are you able to: - E.g., Dress yourself, including tying shoelaces and doing buttons? - (0 = without any difficulty, to 3 = unable to do)
Physical function	Dartmouth Coop Functional Assessment Charts	Questions pertaining to the past 2 weeks 6 items 6 dimensions: - E.g., Physical fitness	During the past 2 weeks: - E.g., what was the hardest physical activity you could do for at least 2 minutes? - (1 = very heavy, to 5 = very light)
Sleep	Pittsburgh Sleep Quality Index	Questions pertaining to the past 2 weeks 18 items Aspects of sleep - E.g., Sleep disturbances Global sleep index	In the past 2 weeks: - E.g., How often have you had trouble sleeping because you have to get up to use the bathroom? - (0 = not during the past 2 weeks, to 3 = three or more times a week)
Satisfaction with life	Satisfaction With Life Scale	Questions pertaining to the present time 5 items Satisfaction with life	I currently feel: - E.g., In most ways, my life is close to my ideal - (1 = strongly disagree, to 7 = agree)
Vitality	Subjective Vitality Scale	Questions pertaining to the past 2 weeks 6 items Vitality	Over the past 2 weeks, generally: - E.g., I have been feeling alive and vital - (1 = not at all true, to 7 = very true)
Anxiety and depression	Hospital Anxiety and Depression Scale	Questions pertaining to the past 2 weeks 14 items Depression (7 items) Anxiety (7 items)	Over the past 2 weeks: - E.g., I still enjoy the things I used to enjoy - (0 = definitely as much, to 3 = not at all)
Positive and negative affect	Positive and Negative AffectSchedule	Questions pertaining to the past 2 weeks 20 items Words describing different feelings/emotions	Over the past 2 weeks: - E.g., Interested - (1 = very slightly or not at all, to 5 = extremely)
Quality of life	World Health Organisation Quality Of Life Scale	Questions pertaining to the past 2 weeks 26 items 4 domains: - E.g., Physical health	Thinking about the past 2 weeks: - E.g., How would you rate your quality of life? - (1 = very poor, to 5 = very good)
Support from participant-identified other for physical activity, reducing sedentary behaviour and breaking up sitting time	Important Other Climate Questionnaire	6 items - Perceived autonomy support from important other regarding physical activity, reducing sedentary behaviour and breaking up sitting time	With regards to being physically active/reducing my sedentary behaviour/breaking up my sitting time: - E.g., I feel that my important other provides me with choices and options about reducing my sedentary behaviour - (1 = strongly disagree, to 7 = strongly agree)
Support from consultant for physical activity, reducing sedentary behaviour and breaking up sitting time	Health Care Climate Questionnaire	6 items - Perceived autonomy support from consultant regarding physical activity, reducing sedentary behaviour and breaking up sitting time	With regards to being physically active/reducing my sedentary behaviour/breaking up my sitting time: - E.g., I feel that my consultant understands how I see things with respect to reducing my sedentary behaviour - (1 = strongly disagree, to 7 = strongly agree)
Need satisfaction for physical activity	Psychological Need Satisfaction For Exercise Scale	Questions pertaining to the past 4 weeks 18 items - Personal experiences of physical activity	With regards to my experiences of physical activity: - E.g., I feel free to do physical activity in my own way - (1 = false, to 6 = true)
Self-efficacy for physical activity and breaking up sitting time	Self-Efficacy for Exercise Scale	9 items - Extent of self-efficacy to take part in physical activity in different situations - Extent of self-efficacy to break up sitting time in different situations	How confident would you feel taking part in physical activity (e.g., walking) 3 times per week for 20 minutes if: - E.g., You felt pain when being physically active - (1 = not confident, to 10 = very confident) How confident would you feel breaking up your sitting time every 20 minutes if: - E.g., You did not enjoy breaking up your sitting time - (1 = not confident, to 10 = very confident)
Motivation for physical activity, reducing sedentary behaviour and breaking up sitting time	Behavioural Regulation in Exercise Questionnaire-2	Questions pertaining to the past 4 weeks 19 items - Reasons for taking part in physical activity, reducing sedentary behaviour and breaking up sitting time 5 dimensions: - Intrinsic regulation (autonomous motivation) - Identified regulation (autonomous motivation) - Introjected regulation (controlled motivation) - External regulation (controlled motivation) - Amotivation	I take part in physical activity/reduce my sedentary behaviour/break up my sitting time: - E.g., Because it is fun - E.g., Because I value the benefits of doing this - E.g., Because I feel guilty when I am not doing this - E.g., Because other people say I should - E.g., But I don’t see why I should
Motivation to limit screen time	Motivation to Limit Screen Time Questionnaire	Questions pertaining to the past 4 weeks 9 items - Feelings/beliefs regarding screen-time behaviour in leisure time	I try to limit my screen-time because: - E.g., I believe too much screen time is bad for my health - (1 = not true at all, to 7 = very true)
Environmental perceptions – active travel and physical activity	Assessing Levels of Physical Activity Scale	3 sections - Home and neighbourhood environment - Walkability	About how long would it take to get from your home to the nearest businesses or facilities listed below if you walked to them? - E.g., Supermarket - (1 = 1-5 min, to 5 = more than 30 min)