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Table 1 Primary and secondary outcome measures and when they are collected

From: Better Outcomes for Older people with Spinal Trouble (BOOST) trial: statistical analysis plan for a randomised controlled trial of a combined physical and psychological intervention for older adults with neurogenic claudication

Outcome measures Time points
Baseline 6 months 12 months
Primary outcome
 Oswestry Disability Index (V2.1a) [11, 16, 17]
Secondary outcomes
Clinical assessment
  Sagittal alignment of the spine [18, 19]
  6 Minute Walk Test [20]
  Hand grip strength [21, 22]
  Short Physical Performance Battery [23]
   Standing balance
   Walking speed
   Chair stands
Patient-reported outcomes
  Fear avoidance beliefs questionnaire [24]
  Swiss Spinal Stenosis Questionnaire [25]
  Global rating of perceived change [26]
  Satisfaction with treatment
  Satisfaction with changes in back and leg problems
  Satisfaction with attempts to increase physical activity
  EQ-5D-5L [27, 28]
  Change in mobility
  Tilburg Frailty Indicator [29]
  Self-report of falls and falls-related injury ProFANE [30]
  Troublesomeness of back and leg problems [31]
  Perceived ability to self-manage
  Self-efficacy [15]
   Modified gait self-efficacy
   Self-efficacy recovery and maintenance
  Index of Habit [12]
  Self-report of adherence to home exercise programme
  Physical activity – Rapid Assessment Disuse Index [14]