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Table 1 Recruitment data for published suicide prevention RCTs for youth [25]

From: Recruitment of adolescents with suicidal ideation in the emergency department: lessons from a randomized controlled pilot trial of a youth suicide prevention intervention

Study (Year) Recruitment Includes ED (Y/N) Screened Eligible Randomized Screen/Randomized
Asarnow et al. (2017) [28] Y 140 60 42 3.3
Bertolote et al. (2010) [29] Y 2973 2896 1867 1.6
Diamond et al. (2010) [30] Y 341 129 66 5.2
Husain et al. (2014) [31] Y 250 236 221 1.1
King et al. (2006) [32] Y 1316 986 289 4.6
King et al. (2009) [33] Y 2493 1050 448 5.7
King et al. (2015) [34] Y 526 49 49 10.7
Mehlum (2016) [35] Y 294 189 77 3.8
Ougrin et al. (2011) [36] Y 96 78 70 1.4
Pineda & Dadds (2013) [37] Y 64 64 48 1.3
Rossouw & Fonagy (2012) [38] Y 120 110 80 1.5
Rudd et al. (1996) [39] Y 303 302 302 1.0
Spirito et al. (2002) [40] Y 82 82 76 1.0
Wharff et al. (2019) [41] Y 330 287 142 2.3
Mean screening-to-randomization ratio for ED- recruitment RCTs: 3.2
Carter et al. (2010) [42] N 112 96 76 1.0
Cooney et al. (2010) [43] N 35 33 29 1.2
Green et al. (2011) [44] N 402 394 366 1.1
Harrington et al. (1998) [45] N 435 288 162 2.7
Hazell et al. (2009) [46] N 138 133 72 1.9
Slee et al. (2008) [47] N 100 92 90 1.1
Wood et al. (2001) [48] N 83 79 63 1.3
Mean screening-to-randomization ratio for outpatient-recruitment RCTs 1.5