Depression and physical comorbidity in primary care.

OBJECTIVE: To analyse how clinical characteristics in depressed patients, as well as the management of their depression, are related to the presence of significant physical comorbidity.
METHODS: This is a two-phase cross-sectional study that took place in 10 primary care centres in Tarragona (Spain). A total of 906 consecutive patients were screened for depression with a self-rating questionnaire and 306 were subject to a structured interview that contained the diagnoses of major depression and dysthymia (DSM-IV), and the severity of the physical comorbidity (Duke Severity of Illness Scale: DUSOI). The association of several clinical variables with the presence of physical comorbidity was evaluated.
RESULTS: The comorbidity was of moderate to extreme severity (DUSOI >50) in 31.7% of cases. The patients with comorbidity visited the physician more often. There were no differences in the consumption of antidepressants, reason for the consultation (psychological/somatic), or the probability of being detected as depressed. Neither were there any differences in the severity or disability between both groups.
CONCLUSION: Physical comorbidity is frequent in primary care depressed patients. In general, the characteristics of depression and the handling by the doctor are similar in patients with and without comorbidity.