Table 1

Demographics and clinical symptom scores (± standard deviation)
Demographic variable/clinical symptom score Healthy (n= 39) Patients (n= 133) Significance test
Female, percentage (f/m) 66.7% (26/13) 62.4% (83/50) χ2(1, n = 172) = 0.24
Age, years# 23.8 ± 2.4 22.3 ± 3.7 t(95.2) = 2.95**
Predicted IQ 105.3 ± 8.2 104.1 ± 8.2 t(145) = 0.73
Education, years 15.1 ± 1.9 12.6 ± 2.4 t(161) = 33.08**
SOFAS 61.6 ± 12.5
K-10 Total 27.6 ± 8.0
HDRS Total 14.1 ± 7.4
BPRS Total 42.3 ± 10.2

Significant differences in gender were evaluated using a Pearson Chi-square test. Independent samples t-tests examined differences in age, predicted IQ and years of education. **p < .01 (2-tailed) #As Levene’s test for equality of variance was significant (p < .05) for age, results that did not assume equal variance were used.

Hatton et al.

Hatton et al. BMC Psychiatry 2012 12:45   doi:10.1186/1471-244X-12-45

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