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. Author manuscript; available in PMC: 2016 Feb 26.
Published in final edited form as: JAMA Psychiatry. 2015 Apr;72(4):316–324. doi: 10.1001/jamapsychiatry.2014.2414

Table 1.

Demographics.

HC (n = 21) SCZ patients (n = 20;
1 schizoaffective, 19
schizophrenia)
p*
Age 32.6 ± 8.1 33.1 ± 10.2 .887
Sex (F/M) 11/10 10/10 .879
Ethnicity (C/AA/Hisp/As/mixed) 2/8/6/2/3 1/9/7/1/2 .913
Parental SES 35.9 ± 11.3 42.6 ± 14.5 .133
Participant SES 37.4 ± 14.2 21.4 ± 8.0 <.001
Nicotine smoking (No/Yes) 18/3 15/5 .638
Drug-naïve/drug-free - 6/14
Onset psychotic symptoms (yrs) - 17.3 ± 7.8
Duration of psychotic illness (yrs) - 13.2 ± 11.3
Drug-free interval (months) - 38.4 ± 67.3, (n = 14)
*

2 group t tests for continuous variables, χ2 for categorical.

Abbreviation: SES = socioeconomic status.