Table 3.

Familial aggregation of psychopathologic measures: SCL t score

Symptomatic dimensions	Control Mean ± SD	Unaffected first-degree relative Mean ± SD	Schizophrenia probands Mean ± SD	P-value	P-value adjusted for age
Obsessive–Compulsive	40.5 ± 7.2	43.6 ± 8.2*	51.0 ± 13.3*,†	<0.001	0.000
Interpersonal–Sensitivity	43.1 ± 7.3	44.9 ± 8.5*	53.3 ± 14.4*,†	<0.001	0.000
Depression	40.6 ± 6.0	45.1 ± 9.0*	51.4 ± 13.1*,†	<0.001	0.000
Hostility	42.2 ± 4.9	45.0 ± 7.3*	49.1 ± 11.8*,†	<0.001	0.000
Phobia	43.3 ± 5.3	46.4 ± 23.7*	55.9 ± 15.9*,†	<0.001	0.000

^*P < 0.05 vs controls by Scheffe test.

^†P < 0.05 vs first-degree relatives by Scheffe test.

SCL, symptom check list; t score, in psychometrics, a t score is a type of standard score computed by multiplying a z-score by 10 and adding 50.