. Author manuscript; available in PMC: 2021 Apr 1.

Published in final edited form as: Schizophr Res. 2020 Jan 13;218:240–246. doi: 10.1016/j.schres.2019.12.037

Table 1.

Demographic and clinical characteristics of the sample.

	Full Sample (n = 569)	Low SIQ (< 31; n = 274)	High SIQ (=/> 31; n = 295)	Differences across SIQ groups
Mean age ± SD	14.83 ± 1.65	14.72 ± 1.70	14.92 ± 1.60	t = −1.44, df = 567, n.s.
Female sex: n (%)	341 (60%)	134 (49%)	207 (70%)	χ² = 26.75, df = 1^**
Suicide attempt n (%)	309 (54%)	88 (32%)	221 (75%)	χ² = 104.86, df = 1^**
Race/ethnicity: n (%)
Caucasian	379 (67%)	170 (62%)	209 (71%)	χ² = 4.95, df = 1^*
African American	63 (11%)	35 (13%)	28 (10%)	n.s.
Other race/ multiracial	109 (18%)	62 (23%)	47 (16%)	n.s.
Hispanic	114 (20%)	56 (20%)	58 (20%)	n.s.

Note: n.s. = non-significant difference across groups.

p < .05

^**

p < .01.