Outcome
Type |
Measure |
Description |
Time frame |
Safety issue |
Other |
Presurgical outpatient visits |
The number of presurgical outpatient visits |
From baseline until the date of the surgery. The data are collected post study from the existing medical records |
|
Other |
Cancellation of surgery |
Cancellation or postponement of surgery (yes/no) |
From baseline until the date of the surgery. The data are collected post study from the existing medical records |
|
Other |
Cancellation of postoperative follow-up visit |
Cancellation or postponement of the postoperative follow-up visit (yes/no) |
From the date of surgery until 6-8 weeks after TKA or at 8-12 weeks after THA. The data are collected post study from the existing medical records |
|
Other |
Hospital length of stay |
Hospital length of stay after TKA or THA (days) |
From the date of surgery until hospital discharge (after the surgery). The data are collected post study from the existing medical records |
|
Other |
Hospital readmission |
The number and date(s) for readmission(s) to the hospital |
From discharge (1-3 days after the surgery) until 6-8 weeks after TKA or at 8-12 weeks after THA. The data are collected post study from the existing medical records |
|
Primary |
Change in Health-related quality of life measured with EuroQol EQ-5D-5L |
EuroQol EQ-5D-5L is a 5-level 5-dimensional standardized assessment tool. The index score (range 0-1 with 1 indicating perfect health and 0 indicating death) is used in the analyses. |
Change from baseline up to 6-8 weeks after TKA or at 8-12 weeks after THA |
|
Secondary |
Change in the Western Ontario and McMaster Osteoarthritis Index (WOMAC) |
WOMAC is a disease-specific, self-administered health status instrument assessing pain, stiffness, and function in patients with osteoarthritis. Three subscale summary scores are used in the analysis: Pain (range:0-20), Stiffness (range: 0-8), Physical function (range 0-68) with lower scores indicating better health. |
Change from baseline up to 6-8 weeks after TKA or at 8-12 weeks after THA |
|
Secondary |
Patient experience post surgery |
An 18-item questionnaire developed for the purposes of this study. The questionnaire entails 17 statements answered on a Likert scale and one open question for additional feedback. The questionnaire is compiled based on the following questionnaires: 11-scale by National Institute for Health and Welfare of Finland, NORPEQ, GS-PEQ and PPE- 15 |
At discharge (1-3 days after the surgery) |
|
Secondary |
Patient experience post intervention |
An 18-item questionnaire developed for the purposes of this study. The questionnaire entails 17 statements answered on a Likert scale and one open question for additional feedback. The questionnaire is compiled based on the following questionnaires: 11-scale by National Institute for Health and Welfare of Finland, NORPEQ, GS-PEQ and PPE- 15 |
6-8 weeks after TKA or at 8-12 weeks after THA |
|
Secondary |
Application user experience |
A 28-item questionnaire developed for the purposes of the study. The questionnaire includes questions with regard to, e.g., perceived usefulness, ease of use, ease of taking into use, and trust. The questions are drawn from Technology Acceptance Model for Mobile Services (TAMM). The questionnaire is asked from the intervention group only. |
6-8 weeks after TKA or at 8-12 weeks after THA |
|
Secondary |
Technological self-efficacy |
Technological self-efficacy is measured with the Healthcare Technology Self-Efficacy (HTSE) -instrument adapted to the context of digital health services. |
At baseline, and 6-8 weeks after TKA or at 8-12 weeks after THA |
|
Secondary |
Self-efficacy regarding preoperative preparation |
Self-efficacy is measured using a self-reported survey item developed for the purposes of this study. |
At baseline |
|
Secondary |
Self-efficacy regarding postoperative preparation |
Self-efficacy is measured using a self-reported survey item developed for the purposes of this study. |
At discharge (1-3 days after the surgery) |
|
Secondary |
Self-efficacy during postoperative rehabilitation |
Self-efficacy during rehabilitation is measured using self-reported survey items developed for the purposes of this study. |
At 1, 3, and 5 weeks after THA/TKA for the intervention group only |
|
Secondary |
Change in Oxford Hip Score (OHS) |
OHS is a patient-reported outcome measure tool designed to assess disability in patients undergoing total hip replacement. The summary score (range: 12-60) is used in the analyses with higher scores indicating most difficulty. OHS is collected routinely as a part of the care path. For the study purposes these data are obtained post study from the existing medical records. |
60 days prior surgery and 120 days after the surgery |
|
Secondary |
Change Oxford Knee Score (OKS) |
OKS is a patient-reported outcome measure tool designed to assess disability in patients undergoing total knee replacement. The summary score (range: 12-60) is used in the analyses with higher scores indicating most difficulty. OKS is collected routinely as a part of the care path. For the study purposes, these data are obtained post study from the existing medical records. |
60 days prior surgery and 120 days after the surgery |
|
Secondary |
Preoperative adherence |
Percentage of completed instruction sheets (denominator is the number of all instruction sheets provided to the patient through the application) |
From baseline until the date of the surgery for the intervention group only |
|
Secondary |
Postoperative adherence |
The proportion of completed exercises (denominator is the number of all exercises provided to the patient through the application) |
From discharge (1-3 days after the surgery) until 6-8 weeks after TKA or at 8-12 weeks after THA for the intervention group only |
|