Adjusted¹ odds ratios with 95% confidence intervals (95% CI) for occurrence of major depressive episode during the previous 12 months² by quartiles of fish consumption (1^st quartile as a reference) stratified by alcohol consumption tertiles³, smoking and physical activity in the Health 2000 Survey.

Adjusted for age as continuous, total energy intake as continuous, level of education, marital status, smoking history, physical activity, alcohol intake (ethanol, g/day) as continuous, Body Mass Index as continuous, fish oil supplement use, current medication for depression or psychiatric disorders, occurrence of severe illness, bronchial asthma, or back pain or illness.

A Finnish translation of the German, computerized version of the M-CIDI interview with DSM-IV[10] sub-threshold cases included.

Mean (Standard Error): In men: 1^st tertile 0.7 (0.03), 2^nd tertile 4.6 (0.1), 3^rd tertile 18 (1.0), In women: 1^st tertile 0.1 (0.004), 2^nd tertile 1.6 (0.02), 3^rd tertile 7.4 (0.2).