Table 2.

Behaviour Test: comparisons between the treatments and wait-list control condition

Measure	Time	Unadjusted mean (s.d.) (N)			Adjusted difference (95% CI), p value, d
		iCT	CT	Wait	iCT v. Wait	CT v. Wait
Anxiety ratings	Pre	64.19 (14.94) (34)	63.21 (17.51) (34)	65.95 (19.22) (34)
	Post	32.37 (15.71) (32)	21.85 (16.21) (34)	58.82 (19.66) (32)	26.87 (19.96–33.78), <0.001, 1.49	36.03 (29.14–42.92), <0.001, 1.97
Behaviour checklist	Pre	3.32 (1.18) (34)	3.37 (1.10) (34)	3.12 (1.34) (34)
	Post	5.49 (0.98) (32)	5.91 (1.06) (34)	3.57 (1.12) (32)	−1.88 (−2.29 to −1.46), <0.001, 1.75	−2.25 (−2.66 to −1.84), <0.001, 2.04

iCT, Internet-based Cognitive Therapy; CT, Standard (face-to-face) Cognitive Therapy.

Adjusted mean differences based on linear mixed-effects models adjusted for baseline scores. d is the standardised effect size (Cohen's d), calculated using the pooled standard deviation. For the behaviour checklist a higher score indicates better performance. Anxiety and behaviour checklist scores are averaged across the conversation and the speech. For the conversation, patients are told they will be meeting two people and should talk with them as though they met them at a party. For the speech the patient stands while the two audience members sit. Patients are asked to talk about a topic that they decide in advance; either some current event, or hobbies, or something work-related. For both the conversation and the speech, patients are given 2 min to prepare before entering the room.