Table 1.

Frequencies, percentages, and attrition rates of study variables.

Variables			Participants at month 0, n		Participants at month 3, n (%)		Attrition rate, n (%)
Study group
	Group 1	22		15 (68)		7 (32)
	Group 2	67		50 (75)		17 (25)
	Total	89		65 (73)		24 (27)
Sex
	Men	34		27 (79)		7 (21)
	Women	55		38 (69)		17 (31)
	Total	89		65 (73)		24 (27)
Educational background
	Vocational school	24		11 (46)		13 (54)
	Lower academic degree	35		29 (83)		6 (17)
	Academic degree	27		24 (89)		3 (11)
	Total	86		64 (74)		22 (26)
Psychological measures
	Personality	88		64 (73)		24 (27)
	RAND-36	89		65 (73)		24 (27)
	Positive and Negative Affect Schedule	89		65 (73)		24 (27)
	Beck Depression Inventory II	83		61 (73)		22 (27)