Table 6. Logistic Regression Model for Major Depressive Episode.

Variable	Odds Ratio (95% confidence interval)	P
Age (/1-y increase)	0.98 (0.94-1.01)	0.2
Employed	0.20 (0.06-0.70)	0.01
Diabetes mellitus	2.09 (1.01-4.33)	0.04
Comorbid psychiatric  illness*	12.03 (4.79-30.23)	<0.001
History of drug or  alcohol abuse	1.21 (0.57-2.56)	0.6
Serum phosphorus  (/1-mg/dL increase)	1.34 (0.98-1.82)	0.07

Note: Refers to a current major depressive episode diagnosed by using the Mini International Neuropsychiatric Interview. The C statistic for the logistic model is 0.797.

^*Refers to the presence of at least 1 psychiatric illness other than depression or drug or alcohol abuse.