. Author manuscript; available in PMC: 2014 Nov 1.

Published in final edited form as: J Affect Disord. 2013 Aug 14;151(2):10.1016/j.jad.2013.08.003. doi: 10.1016/j.jad.2013.08.003

Table 1.

Sociodemographic and clinical characteristics of bipolar patients (BPD), unaffected siblings (UAS) and healthy controls (HC).

Subject Characteristic	BPD (n = 55)	UAS (n = 53)^a	HC (n = 113)	Statistic	p value	Group Difference^b
Sex: male/female	19/36	19/34	60/53	χ² = 7.2	.027	BD=UAS<HC
Race: white/nonwhite	31/24	30/23	74/39	χ² = 1.89	.390	BD=UAS=HC
Age	39.4 (12.2)	40.7 (11.7)	38.0 (11.6)	F = 1.02	.361	BD=UAS=HC
Estimated IQ	98.7 (10.5)	99.3 (10.2)	98.8 (12.4)	F = 0.05	.952	BD=UAS=HC
CARS-M	4.1 (4.7)	1.6 (2.4)	0.8 (3.1)	F = 24.44	<.001	BD>UAS=HC
HDRS	6.6 (5.0)	3.1 (2.9)	1.8 (4.0)	F = 33.69	<.001	BD>UAS>HC

Note: All data are reported as mean (standard deviation) unless otherwise noted.

Data were missing for two unaffected sibling participants, who were subsequently dropped from the analysis.

Group differences are reported based on Bonferroni-corrected post-hoc Mann-Whitney U tests.