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Table 6 Trial and recruitment characteristics that significantly affected recruitment rate for included stroke rehabilitation RCTs

From: A systematic review of the efficiency of recruitment to stroke rehabilitation randomised controlled trials

   Trial feature Kruskal–Wallis P RCTs Subgrouping (medians)
Recruitment rate Trial characteristics Trial size X2(4) = 15.07 0.005 242 21 or fewer (0.83)
22–34 participants (1.53)
35–60 participants (2.50)*
61–99 participants (1.7)
100 ore more (1.62)
Targeted impairment X2(3) = 14.97 0.002 241 Arm function (1.34)
Leg function (1.84)
Overall disability 2.16)*
Cognitive or vision 0.95)
Recruitment characteristics Continent of recruitment X2(2) = 24.21 0.001 283 Europe (1.28)
Asia (2.68)*
North America (1.35)
Recruiters per site X2(3) = 15.97 0.001 122 One recruiter covering multiple sites (0.54)
One recruiter per site (2.14)*
Between one and two recruiters per site (1.5)
More than two recruiters per site (1.9)
  1. * Best recruitment condition
  2. Kruskal-wallis = appropriate statistics for Kruskal–Wallis test, p = significance level, RCTs = number of RCTs contributing to this finding