Table 5.

Course of illness, education, and gender effects on Barratt Impulsiveness Scale (BIS-11) in subjects with bipolar disorder

	BIS total	BIS nonplanning	BIS motor	BIS attention
Age at onset	8.2 (0.006)	2.4 (0.12)	6.8 (0.012)	7.4 (0.009)
Current age	1.6 (0.2)	0.6 (0.43)	11.5 (0.001)	3.4 (0.07)
Education	3.52 (0.07)	5.4 (0.024)	0.3 (0.7)	2.4 (0.13)
Gender	1 (0.3)	1.7 (0.2)	0.6 (0.5)	3.7 (0.06)
Many episodes	5.8 (0.02)	4.5 (0.04)	4.2 (0.04)	2.1 (0.15)
Gender × many	0.2 (0.7)	0.2 (0.67)	2.1 (0.15)	3.4 (0.07)

Table shows F ratios from general linear model analysis; F df = 1,53. Age at onset, current age, and years of education were continuous predictor variables; gender and presence of many episodes were dichotomous categorical predictor variables; and BIS-11 scores were dependent variables. Statistical significances of F ratios are in parentheses (p). Significant F ratios are shown in bold type.