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Table 3 Assumptions made about numbers of participants at different timepoints

From: The clinical and cost effectiveness of cognitive behavioural therapy plus treatment as usual for the treatment of depression in advanced cancer (CanTalk): study protocol for a randomised controlled trial

Time

Cognitive behavioural therapy over treatment as usual; difference in BDI-II score

Percent remaining in the study

TAU

CBT

n = 120

n = 120

0 weeks (baseline)

0

100

120

120

6 weeks

3

70

84

84

12 weeks

6

65

78

78

18 weeks

6

63

76

76

24 weeks

6

60

72

72