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Table 2 Dropout rates of the preference and randomized arms in the trials included in this review

From: A scoping review on two-stage randomized preference trial in the field of mental health and addiction

Trial

Publications

N

Intervention and comparison groups

Dropout rate

RR [95% CI]

Preference arm

Random arm

1

Rokke et al. 1999 [10]

35

A: Behavioral therapy

B: Cognitive therapy

20.0%

75.0%

0.27[0.09—0.76]

2

Hegerl et at. 2010 [11]; Mergl et al. 2011 [12]

226

A: Medication (sertraline)

B: CBT

30.5%

43.8%

0.70 [0.48—1.01]

3

He et al. 2018 [13]; Gewirtz et al. 2019 [14]

128

A: Parent Management Training-Oregon Model (PMTO)

B: Services as usual (SAU)

53.8%

72.3%

0.73 [0.56—0.96]

4

Le et al. 2018 [15]; Zoellner et al. 2019 [16]

200

A: Medication (sertraline)

B: Prolonged exposure therapy

28.9%

36.9%

0.78 [0.52—1.17]

5

Brenes et al. 2020 [17]

500

A: CBT

B: Yoga

4.4%

8.8%

0.50 [0.28—1.01]

6

Svensson et al. 2021a [18]; Svensson et al. 2021b [19]

217

A: Panic Control Treatment

B: Panic focused psychodynamic therapy

10.1%

12.0%

0.84 [0.39—1.79]

Pooled overall (Mantel–Haenszel method,random effects model) P = 0.010

 

0.70 [0.56—0.88]