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Table 3 Study recruitment rates, withdrawal rates and exercise adherence rates reported as overall, and for exercise mode, intervention supervision, intervention length, timing with respect to treatment, cancer diagnosis and study quality

From: Exercise and colorectal cancer: a systematic review and meta-analysis of exercise safety, feasibility and effectiveness

  Recruitment rate (%)
Median
(minimum, maximum)
[n = 16 trials]
Withdrawal rate (%)a
Median (minimum, maximum)
Adherence rate (%)
Median
(minimum, maximum)
[n = 14 groupsa from n = 12 trials]
Exercise
[n = 21 groups from 19 trialsa]
Usual care
[n = 19 groups from 19 trials]
Overall 38 (4–91) 12 (0, 22) 11 (0, 31) 86 (42, 98)
Mode
 Aerobic exercise 28 (15, 38) 5 (0, 14) 8 (0, 8) 76 (42, 93)
 Mixed mode exercise 41 (4, 91) 12 (0, 90) 15 (0, 31) 88 (61, 98)
 Other exercise b − b − b − b
Supervision
 Supervised 39 (10, 91) 11 (0, 22) 18 (0, 31) 88 (53, 98)
 Unsupervised 37 (4, 84) 12 (0, 21) 8 (0, 21) 76 (42, 93)
Length
  < 12 weeks 61 (18, 91) 12 (0, 22) 18 (0, 31) 85 (53, 98)
  ≥ 12 weeks 33 (4, 54) 12 (0, 21) 8 (0, 21) 89 (42, 93)
Treatment
 Pre-treatment 88 (84, 91) 14 (0, 16) 11 (0, 18) 78 (74, 98)
 During treatment 33 (26, 39) 12 (5, 14) 8 (0, 31) 75 (42, 89)
 Post-treatment 28 (4, 61) 11 (0, 22) 13 (0, 21) 88 (53, 93)
Cancer diagnosis
 Colorectal 27 (4, 91) 11 (0, 22) 14 (0, 31) 77 (42, 98)
 Colon only 39 (10, 61) 12 (0, 14) 8 (0, 19) 89 (61, 93)
 Rectal only b b b b
Study quality
 Low b b -b -b
 High 38 (4, 91) 12 (0, 22) 11 (0, 31) 88 (42, 98)
  1. a Reported by intervention groups because n = 2 trials involved multiple intervention groups
  2. b Insufficient number of studies