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Table 3 Schedule of enrolment, interventions, and assessments

From: The effects of prehabilitation versus usual care to reduce postoperative complications in high-risk patients with colorectal cancer or dysplasia scheduled for elective colorectal resection: study protocol of a randomized controlled trial

STUDY PERIOD Enrolment Allocation Post-allocation Follow-up
    Pre-prehabilitation Prehabilitation Post-prehabilitation  
TIMEPOINT -t1 0   Week 1 Week 2 Week 3   Day 7 post-surgery Day 30 post-surgery
 Eligibility screening X         
 VSAQ score (METs) X         
 Informed consent X         
 Allocation   X        
 CPET X         
 Intervention group (prehabilitation program)        
 Usual care group
 Baseline characteristics X         
 SNAQ score (0-5) X         
 VAT on CPET (mL/kg/min)    X     Xa   
 TUG test (s)    X     Xa   
 Muscle strength test    X     Xa   
 IADL    X       X
 GDS 15    X       X
 EORTC QLQ-C30    X       
 GFI    X       X
 Brief illness perception questionnaire    X     Xa   
 EQ-5D    X     Xa   
 Postoperative complications         X X
  1. a: Only for patients in the prehabilitation group
  2. Abbreviations: CPET, cardiopulmonary exercise test; EORTC QLQ-C30, quality of life questionnaire of the European organisation for research and treatment of cancer; EQ-5D, EuroQol 5D; GDS 15, geriatric depression scale 15; GFI, Groningen frailty indicator; IADL, instrumental activities of daily living; MET, metabolic equivalent of task; SNAQ, short nutritional assessment questionnaire; TUG, timed up-and-go; VAT, ventilatory anaerobic threshold; VSAQ, veterans-specific activity questionnaire