Table 2.
Primary and secondary outcome measures
| Measure | Instrument | Collection points and method |
|---|---|---|
| Primary outcome: | ||
| Self-reported Pain intensity | Visual Analogue Scale (VAS) | Baseline, 3 and 12 months follow up by post/email |
| Secondary outcomes: | ||
| Self-reported function | SF-36 Physical Function | Baseline, 3 and 12 months follow up by post/email |
| Self-reported function and pain | Oxford Knee Score (OKS) | Baseline, 3 and 12 months follow up by post/email |
| Self-reported health status | EQ-5D-3 L | Baseline, 3 and 12 months follow up by post/email |
| Self-reported pain catastrophizing | Pain Catastrophizing Scale (PCS) | Baseline, 3 and 12 months follow up by post/email |
| Self-reported daily function and quality of life | Knee injury and Osteoarthritis Score (KOOS) | Baseline, 3 and 12 months follow up by post/email |
| Self-reported pain self-efficacy | Pain Self-Efficacy Questionnaire (PSEQ) | Baseline, 3 and 12 months follow up by post/email |
| Daily activity | Tri-axial accelerometer | Baseline, 3 and 12 months follow up by post/email |
| Physical function | 6 min’ walk test (6MWT) | Baseline, 3 and 12 months follow up test in clinic |
| Physical function | Sit to stand 30 s. (STS30) | Baseline, 3 and 12 months follow up test in clinic |
| Muscle mass and bone mineral density | DXA scan | Baseline, 3 and 12 months follow up scan in clinic |
| Other measures | ||
| Healthcare visits | Self-report (log book) | 0–3 months’ post-operative at home |
| Smoking | Self-reported questionnaire | Baseline, 3 and 12 months follow up by post/email |
| Pain killers | Self-reported questionnaire | Baseline, 3 and 12 months follow up by post/email |
| Alcohol | Self-reported questionnaire | Baseline, 3 and 12 months follow up by post/email |
| Education | Self-reported questionnaire | Baseline, 3 and 12 months follow up by post/email |
| Social status | Self-reported questionnaire | Baseline, 3 and 12 months follow up by post/email |