Table 1a.

Characteristics of Samples Included in Bilateral Structure Analyses

	Schizophrenia			Controls
Characteristic	N	Mean Across Samples	SD Across Samples	N	Mean Across Samples	SD Across Samples
Group Size	219	34.94	27.23	219	36.68	31.60
Age	204 (201)	30.74 (7.20)	8.27 (2.97)	204 (201)	30.39 (7.15)	8.53 (3.28)
Sex	216	66.74	28.60	216	64.17	28.96
Handedness	138	92.76	9.42	137	94.35	7.55
Ethnicity	32	70.94	26.07	32	76.03	21.84
Education	90 (89)	12.42 (2.48)	1.72 (0.84)	90 (89)	14.01 (2.50)	1.90 (1.12)
Socioeconomic Status	48 (48)	2.88 (1.02)	0.57 (0.39)	47 (47)	2.62 (0.92)	0.60 (0.31)
Intelligence Quotient	45 (44)	97.61 (13.68)	9.45 (3.51)	45 (44)	109.79 (11.70)	7.34 (2.84)
Height	37 (37)	170.11 (8.11)	6.82 (2.16)	37 (37)	171.59 (7.69)	7.09 (2.20)
Scanning Parameters
Magnetic Field Strength
0.5 T	1	0.5%
1.0 T	5	2.3%
1.5 T	180	82.2%
2.0 T	1	0.5%
3.0 T	20	9.1%
Slice Thickness	181	1.59	0.83
Slice Gap Width	124	0.07	0.35
Intrarater Reliability	71	0.91	0.08
Interrater Reliability	31	0.92	0.07
Clinical Characteristics
First-Episode (%)	63	94.53	18.10
Chronic (%)	27	97.91	10.88
Inpatient (%)	10	71.94	32.77
Outpatient (%)	14	78.97	33.52
Medicated (%)	82	90.66	24.16
Antipsychotic Dosage	68 (66)	468.17 (344.97)	220.16 (174.51)
Illness Onset	94 (94)	22.64 (5.47)	3.79 (1.70)
Illness Duration	131 (129)	9.65 (6.10)	7.11 (3.56)
Symptom Severity	51 (51)	71.52 (16.53)	15.02 (5.25)

Note. Group proportions or means within samples are shown with standard deviations enclosed in parentheses where appropriate. N (number of samples reporting a given characteristic), sex (proportion male), handedness (proportion right-handed), ethnicity (proportion European ancestry), education (years of formal education), height (centimeters), socioeconomic status (parental socioeconomic status rated on the Hollingshead Index), antipsychotic dosage (daily dosage in chlorpromazine equivalents only for antipsychotic exposed samples), illness onset (age at schizophrenia onset), symptom severity (Positive and Negative Symptom Scale overall score).