Table 3.

Determinants of major depressive disorder according the DSM-IV criteria.

Explanatory variable	Estimate	Standard error	Odds ratio	95% confidence interval
Metabolic factor score	0.30	0.068	1.35	1.18 to 1.54
Mental factor score	0.65	0.063	1.91	1.69 to 2.16
Male sex	reference
Female sex	0.68	0.15	1.98	1.49 to 2.64
Living alone	reference
Living with someone	−0.53	0.12	0.59	0.46 to 0.75
Low social activity level	reference
Medium social activity level	−0.56	0.15	0.57	0.43 to 0.76
High social activity level	−0.57	0.15	0.57	0.42 to 0.76
Low GHQ-12 sum score	reference
High GHQ-12 sum score	2.21	0.13	9.16	7.16 to 11.71
Low BDI sum score	reference
Medium BDI sum score	1.43	0.16	4.19	3.05 to 5.74
High BDI sum score	2.81	0.16	16.65	12.07 to 22.95

GHQ-12 = 12-item General Health Questionnaire; BDI = Beck Depression Inventory.