Table 1. Included studies.
Type | N | N completers (100%) | N completers (80%) | N responders to post-treatment | Sessions completed mean (SD) | Maximum amount of sessions | Country | ITT analysis | |
Bodenmann et al., 2008 | FtF CBT | 20 | 20 | 20 | 19 | 20 (0) | 20 | Swiss | yes |
Castonguay et al., 2004 | FtF CBT | 14 | 12 | NR | 12 | NR | 20 | US | no |
Constantino et al., 2008 | FtF CBT | 11 | 8 | 8 | 8 | 14.38 (2.39) | 16 | US | yes |
David et al., 2008 | FtF CBT | 56 | 50 | NR | 49 | 17.55 (5.51)f | 20 | Rom | yes |
DeRubeis et al., 2005 | FtF CBT | 60 | 51 | 51 | 51 | 23.95 (9.72)f | 28 | US | yes |
Dimidjian et al., 2006 | FtF CBT | 45 | 39 | 39 | 39 | 20.91 (7.97)f | 24 | US | yes |
Dunlop et al., 2012 | FtF CBT | 41 | NR | NR | NR | NR | 16 | US | yes |
Hautzinger & Welz, 2008 | FtF CBT | 31 | 26 | NR | 26 | NR | 15 | Ger | yes |
McBride et al., 2006 | FtF CBT | 37 | 29 | NR | 28 | 16.56 (3.22) | 20 | Can | yes |
Serfaty et al., 2009 | FtF CBT | 70 | NR | NR | 64 | 7.09 (4.41) | 12 | UK | yes |
Strauman t al., 2006 | FtF CBT | 21 | 17 | 18 | 20 | 18.2 (SD NR) | NRg | US | yes |
Teismann et al., 2011 | FtF CBT | 34 | 33 | 33 | 28 | 22.4 (3.8) | 24 | Ger | no |
Thompson et al., 2001 | FtF CBT | 31 | 24 | NR | 24 | NR | 20 | US | yes |
Watson et al., 2003 | FtF CBT | NR | 33 | NR | 33 | NR | 16 | Can | yes |
Andersson et al., 2005 | Guid. iCBT | 57 | 37 | NR | 36 | 3.7 (1.9) | 5 | Swe | yes |
Berger et al., 2011 | Guid. iCBT | 25 | 14 | NR | 25 | 8.52 (2.86) | 10 | Swiss/Ger | yes |
Choi et al., 2012 | Guid. iCBT | 28 | 17 | 17 | 23 | 4.93 (1.88) | 6 | Aus | yes |
Johansson et al., 2012a | Guid. iCBT | 39 | NR | NR | 36 | 6.91 (SD NR) | 8–10 (m = 9.7) | Swe | yes |
Johansson et al., 2012b | Guid. iCBT | 40 | NR | NR | 34 | 5.97 (SD NR) | 8 | Swe | yes |
Perini et al., 2009 | Guid. iCBT | 27 | 20 | 20 | 18 | 5.33 (1.21) | 6 | Aus | yes |
Ruwaard et al., 2009 | Guid. iCBT | 36 | 33 | NR | 33 | NR | 8 | NL | yes |
Titov et al., 2010c | Guid. iCBT | 43 | 33 | 35 | 37 | 5.30 (1.57) | 6 | Aus | yes |
Titov et al., 2010d | Guid. iCBT | 47 | 32 | 37 | 41 | 5.21 (1.43) | 6 | Aus | yes |
Titov et al., 2011e | Guid. iCBT | 18 | NR | NR | NR | NR | 8 | Aus | yes |
Vernmark et al., 2010 | Guid. iCBT | 29 | 17 | NR | 27 | 6 (1.58) | 7 | Swe | yes |
Abbreviations: Guid. iCBT = guided internet-delivered cognitive behavioural therapy; FtF CBT = individual face-to-face cognitive behavioural therapy;
NR = not reported; SD = standard deviation; ITT = intention to treat.
Tailored intervention group.
Standardised intervention group.
Technician assisted.
Clinician assisted.
Transdiagnostic intervention. Adherence was reported, but not specifically for the depressed group.
Mean and standard deviation estimated.
Participants completing 12 or more sessions were considered completers, but there was no maximum amount of sessions.