Table 2.

Demographic characteristics of participants included in the analyses.

Sample	Average age in years (standard deviation)	Gender	Ethnic origin	Nationality	Marital status	Employment	Education	Years in education (standard deviation
Placebo-controlled	34.76 (9.44)	46.2% female, 53.8% male	92.7% White, 7.7% Turkish	69.2% British, 7.7% Serbian, 7.7% Danish, 7.7% Chilean, 7.7% Turkish	61.5% single, 30.8% married, 7.7% did not answer	69.2% skilled, 15.4% student, 7.7% unskilled, 7.7% other	69.2% degree, 30.8% other	23.58 (10.95)
Prospective	33.12 (7.57)	41.18% female, 58.82% male	64.7% White, 11.8% Asian, 11.8% not answered, 5.9% Black, 5.9% other	47.1% British, 11.8% Hungarian, 11.8% German, 5.9% Dutch, 5.9% Chilean, 5.9% Russian, 5.9% American, 5.9% French	64.7% single, 23.5% married, 5.9% divorced, 5.9% not answered	70.6% skilled, 29.4% student	100% degree	18.82 (5.22)