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. Author manuscript; available in PMC: 2021 Feb 1.
Published in final edited form as: Schizophr Res. 2019 Dec 26;216:104–110. doi: 10.1016/j.schres.2019.12.021

Table 1.

Cohort characteristics stratified by family history of psychosis symptoms.

No Family History
of Psychosis
Symptoms
N=8,439		 Family History of
Psychosis Symptoms
N=489		 P-value*
n (%)
Sex (female) 4,346 (52%) 277 (57%) 0.03
Race
 African American 2,726 (32%) 203 (42%) <0.001
 European American 4,819 (57%) 200 (41%) <0.001
 Other 895 (11%) 86 (17%) <0.001
Ethnicity (Hispanic) 540 (6%) 54 (11%) <0.001
Mean (SD)
Age (years) 14.23 (3.69) 14.20 (3.50) 0.83
Neighborhood SES Z score 0.02 (0.99) −0.38 (1.02) <0.001
Lifetime Traumatic Stressful Events 0.77 (1.14) 1.34 (1.61) <0.001
*

The categorical variables were compared using 2-sample z-tests of proportions, and the continuous variables were compared using t-tests. SD = standard deviation, SES = socioeconomic status (higher values indicate higher SES); Lifetime Traumatic Stressful Events (higher values = higher number of exposures endorsed)