Research paperA study in the general population about sadness to disentangle the continuum from well-being to depressive disorders

- Sadness is frequent in the general population (29.8%).
- Sadness shares sociodemographic and clinical correlates with MDD subjects.
- Psychiatric disorders are more frequent amongst the subjects with MDD than amongst the sad people.
- Our study is consistent with the existence of a depressive continuum.

ObjectiveSadness is both a common experience in general population and one of the main criteria of major depressive disorder (MDD). We tested the hypothesis of a depressive continuum using sadness as an intermediate experience between well-being and disorder.MethodsA French cross-sectional Mental Health survey in General Population interviewed 38,694 individuals. We examined prevalences and compared sociodemographic correlates and psychiatric disorders of individuals in 3 independent groups 1) MDD, 2) sadness without MDD, and 3) controls.ResultsThe prevalence of sadness was of 29.8% in the whole sample and of 93% in subjects suffering from MDD (n = 4976). The “sadness” group shared the same sociodemographic patterns as the “MDD” group. All psychiatric disorders assessed (i.e. bipolar disorder, anxiety disorder, alcohol use disorder, psychotic disorder and suicide attempts) were significantly associated with both “sadness” and “MDD” groups compared to “controls”. Individuals with sadness, compared to those with MDD, were significantly less likely to meet the criteria for all psychiatric disorders. MDD's sensitivity of sadness was 94,2%.LimitationsEven though we used a quota sampling method, the sample was not strictly representative of the general population.ConclusionSadness validates the depressive continuum hypothesis, since it is more frequent in the general population than MDD itself and at the same time shares with MDD the same sociodemographic and clinical correlates. A gradual association from controls to MDD was observed for psychiatric comorbidities. Finally, the high sensitivity of sadness may suggest its use to screen at-risk individuals converting from well-being to full psychiatric disorders.