['To examine the influence of depression on postconcussion symptom reporting in patients following mild traumatic brain injury (MTBI).', 'Sixty patients referred to a specialty clinic following MTBI, 58 outpatients with Structured Clinical Interview for DSM-diagnosed depression, and 72 healthy community control participants.', 'Participants with MTBI were divided into 2 subgroups on the basis of self-reported symptoms of depression (23 MTBI-depressed, 37 MTBI-not depressed). All participants completed a postconcussion symptom questionnaire.', 'British Columbia Post-concussion Symptom Inventory.', "There were significant differences in total reported postconcussion symptoms among all 4 groups (all P < .002; Cohen's d = 0.68-3.24, large to very large effect sizes; MTBI-depressed > depressed outpatients > MTBI-no depression > healthy controls). There were significant differences in the number of symptoms endorsed (P < .05), with the highest number of symptoms endorsed by the MTBI-depressed group, followed by depressed outpatients, MTBI-no depression, and healthy controls."] Does depression strongly influence postconcussion symptom reporting following mild traumatic brain injury?