Table 1.

Distribution of the sample according to study variables.

Total	Characteristics	1005 (n)	%
Penitentiary Center	Alicante II	509	50.6
	Picassent	199	19.8
	Castellón II	297	29.6
Country	Spain	866	86.2
	Not Spain	139	13.8
Age	<30 years	237	23.6
	30–60 years	720	71.6
	>60 years	47	4.7
Sex	Men	937	93.2
	Women	68	6.8