Table 3.

Cavum septum pellucidum data for patients with schizophrenia and healthy controls

Variable	Patients (N=77)		Controls (N=55)		Analysis
	Mean	S.D.	Mean	S.D.	t	P
# slices in which CSP appears	3.3	4.8	2.8	2.1	0.78	0.44
	N	%	N	%	χ2	P
% with large CSP (≥ 6 one mm slices)	11	14.3	5	9.1	0.81	0.37
CSP present (1 one mm slice minimum)	53	68.8	42	76.4	0.90	0.34
Grade:
0 (absent)	24	31.2	13	23.6
1 (questionable/equivocal)	19	24.7	21	38.2
2 (mild)	19	24.7	12	21.8
3 (moderate)	6	7.8	7	12.7
4 (large)	9	11.7	2	3.6	χ2 for grade: 5.98	0.20