Table 1.

Validity and reliability of the SCL-90 questionnaire.

Item	Somatization	Obsessive compulsive	Interpersonal sensitivity	Depression	Anxiety	Hostile	Terror	Paranoia	Psychosis
Whole sample ( n = 844)
Cronbach alpha coefficient	0.83	0.81	0.89	0.81	0.80	0.73	0.79	0.78	0.80
Test-retest correlateion	0.86	0.83	0.77	0.93	0.84	0.78	0.80	0.89	0.77
Correlation with whole score	0.82	0.88	0.80	0.85	0.85	0.79	0.82	0.85	0.82