Table 5

Recruitment target attainment (n=300)

Characteristicn (%)
Sample size
 Calculation reported155 (51.7)
 Recruitment target reached*102/145 (70.3)
Recruitment delays reported
 Yes19 (6.3)
 No281 (93.7)
Types of recruitment delays†
 Patient-level factors10/19 (52.6)
 Trial-level factors9/19 (47.4)
 Site-level factors1/19 (5.3)
 Trial-team-level factors1/19 (5.3)
 Not specified4/19 (21.1)
How recruitment delays were addressed‡
 Stopping the trial before reaching the target13/19 (68.4)
 Extending the recruitment period3/19 (15.8)
 Modifying the eligibility criteria3/19 (15.8)
 Adding additional trial sites2/19 (10.5)
 Modifying incentives1/19 (5.3)
  • *Based on sample size calculation and number randomised; data for this calculation were unavailable for 10 trials that reported a sample size calculation.

  • †Total exceeds 19 because some trials reported more than one type of delay.

  • ‡Total exceeds 19 because some trials reported more than one method.