## Table 1 |
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Demographics and clinical symptom scores (± standard deviation) |
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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) | χ^{2}(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