Table 2 Changes in outcome measures at follow up assessment in those receiving simple and detailed risk information

	Difference scores		Between-group
	Control	Intervention	p Value
Anxiety VAS	2.5 (−1.4 to 6.4)	14.0 (10.1 to 17.9)	<0.001*
APAIS – procedure	0	1.0	0.003**
Median (range)	(0–8)	(0–6)
APAIS – outcome	0	1.0	0.03**
Median (range)	(0–8)	(0–11)
APAIS – anxiety total	0.57 (0.05 to 1.10)	1.73 (1.19 to 2.26)	<0.001*
APAIS – information	0.28 (−0.03 to 0.60)	0.03 (−0.30 to 0.36)	0.8*

Data are mean (95% confidence intervals) unless indicated.
*t test; **Mann-Whitney U test.
APAIS, Amsterdam preoperative anxiety and information scale; VAS, visual analogue scale.