Table 5.

Result of linear regression with log transformed bedtime cortisol levels as dependent variable and clinical factors as independent variables.

	Model 1.		Model 2.
	β	p value	β	p value
Positive substance abuse history	0.014	0.888	0.002	0.980
Years of illness	0.065	0.534	0.044	0.671
Positive current smoking status	0.032	0.750	−0.022	0.831
BMI at baseline	0.082	0.363	0.043	0.636
Positive history of mixed episodes	−0.145	0.137	−0.161	0.096
Unclear history of mixed episodes	−0.206	0.023a	−0.233	0.010a
Positive history of rapid cycling	0.166	0.103	0.133	0.189
Unclear history of rapid cycling	−0.039	0.690	−0.074	0.446
Illness pattern is chronic	0.014	0.897	−0.014	0.895
Illness pattern is unclear	−0.095	0.276	−0.074	0.392
Depressed at baseline	−0.100	0.334	−0.069	0.502
Hypomanic/manic/mixed at baseline	−0.062	0.489	−0.049	0.580
Mood state at baseline is unknown	0.264	0.009a	0.258	0.010a
Male	−0.032	0.738	0.014	0.885
Female and menopausal	−0.154	0.158	−0.137	0.204
Female and menopausal status is unknown	−0.062	0.499	−0.055	0.543
Suicide attempt history			0.208	0.041a
Intercept (B)	−.814	<0.001	−0.791	<0.001
R2	0.180		0.209
Adjusted R2	0.069		0.094
R2 change			0.029
F value of R2 change (df)			4.289 (1, 117)
p value of R2 change			0.041a
p value for full model	0.074		0.033a
Sample Size	135		135

^aStatistically significant difference (p<0.05).