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Scores of the severity index of depression (PHQ-9 questionnaire)
| PHQ-9 scores | Fulfilling criteria for | Overall | ||||
| Gender | N | Mean | SD | Major Depression | Minor Depression | Depressive Disorder |
| male | 344 | 15.33 | 4.76 | 38 (11.0%) | 27 (7.8 %) | 65 (18.9%) |
| female | 668 | 15.95 | 4.63 | 84 (12.6 %) | 47 (7.1 %) | 131 (19.6%) |
| ∑ | 122 (12.0%) | 74 (7.3%) | 196 (19.4%) | |||
* p < 0.05; **p < 0.01; PHQ-9 scores compared by ANCOVA (adjusted for age, disease duration and comorbidities); severity categories by means of Chi-square-test
