Study to Reduce Sitting in Older Adults Undergoing Hip or Knee Replacements

Study uptake rates (as % of those approached who are randomised, recruitment rates (N/mth)

Self-recording by participants of goal achievement on a scale of 1-5, recorded each week for the first 6 weeks of the intervention in their goal-setting booklet.

Percentage of participants whose surgery is scheduled up to 2 weeks prior to the end of the intervention

Percentage of participants whose surgery is scheduled up to three weeks after the end of the intervention

Percentage of participants whose surgery is delayed beyond 3 weeks post-intervention

Assessed by the number of participants who attend the follow-up visit (visit 5, 6 weeks post-surgery)

Assessed by custom-made feasibility questionnaire which uses a number of closed and open questions. Closed questions include (Likert 1-5 scale):

How easy was it to achieve your goals physically? How easy was it to achieve your goals mentally? Have you found taking part in the study burdensome?

Assessed by custom-made feasibility questionnaires, using both closed and open questions. Closed questions include (1-5 Likert scale):

Could you have changed your goals to make them more achievable? Which part(s) of the intervention did you find most difficult?

Whether patients are satisfied, as assessed by feasibility questionnaires given at visit 4 (week prior to surgery) and visit 5 (week post-surgery). This included open and closed questions. Closed questions include (Likert scale 1-5):

Which part(s) of the intervention did you find most enjoyable? How would you rate your overall satisfaction with the study? How likely would you be to suggest taking part in such a study to friends or family? How likely are you to continue working towards your goals in the future?

Any change in patient safety as assessed by custom-made feasibility questionnaires. This includes closed and open questions. Closed questions include (Likert 1-3 scale):

Do you feel that taking part in the study has exposed you to more pain? Do you feel that taking part in the study has exposed you to risk of physical harm?

Short Physical Performance Battery (SPPB)

Assessed via activpal, mean minutes per day

Assessed via activpal, mean minutes per day

Assessed via activpal, mean minutes per day

Assessed via activpal, n/day

Assessed via activpal, n/day

Measure of Older Adults' Sedentary Time (MOST)

EuroQol five dimensions questionnaire (EQ-5D) Assessed for each subscale (1-5 score on each); Mobility, Self-Care, Usual Activities, Pain, and Anxiety

Scale of overall perceived health on that day: scale 1-100 (100 is best, 0 is worst)

Oxford Hip/Knee Score. Reported as a scale from 0-48, where 0 is the most severe hip/knee osteoarthritis, and 48 is no indication of hip/knee osteoarthritis.

Three subscales: autonomy, relatedness, and competence. R equals reverse scoring. Max score for each is 49. Total score is not computed.

Autonomy:

1, 4(R), 8, 11(R), 14, 17, 20(R)

Competence:

3(R), 5, 10, 13, 15(R), 19(R)

Relatedness:

2, 6, 7(R), 9, 12, 16(R), 18(R), 21

The International Physical Activity Questionnaire (IPAQ) Short Form asks the amount of hours spent doing vigorous, moderate, and walking activities per day, and for how many days. It also asks for the average perceived sitting time per day.This gives a score for self-reported Vigorous Physical Activity, Moderate Physical Activity, Walking, and Sitting time.

Each item assess independence, in several domains, namely has a maximal overall score of 6 indicating maximal independence. The items are Bathing, Dressing, Toileting, Continence, Transferring (from bed to chair) and Feeding.

KGs

CMs

kg/m2

Waist to Hip Ratio (WHR) = Gw / Gh

Short Form Mini Nutritional Assessment (SF-MNA). Gives a scale from 0-14, where 0 is most severely malnourished.

Albumin

High Density Lipoprotein

Low density lipoprotein

Triglycerides

Vitamin D

C-Reactive Protein

Interleukin 6

Tumor Necrosis Factor Alpha

Cortisol

Dehydroepiandrosterone sulfate

Transferrin