The improvement percentages and full remission percentages among the different groups at the two-year follow-up.^a^,^b^,^c

IP = improvement percentage, HAMD = Hamilton Depression Rating Scale, DS = Depression subscale of the Depression and Somatic Symptoms Scale (DSSS), SS = Somatic subscale of the DSSS, HADS-D = Depression subscale of the Hospital Anxiety and Depression Scale (HADS), HADS-A = Anxiety subscale of the HADS *p < 0.01 for the inactive migraine subgroup vs. the active migraine subgroup a Patients without migraine at baseline were categorized as the no migraine group. Patients with migraine diagnosed at baseline and with no headache or mild headache at follow-up were categorized as the inactive migraine group. Patients with migraine diagnosed at baseline and with moderate or severe headache at follow-up were categorized as the active migraine group. b Subjects with pharmacotherapy in the index follow-up month were categorized as the treated group and those without pharmacotherapy were categorized as the undertreated group. c The improvement percentage was calculated as (score at baseline—score at follow-up) × 100% / score at baseline. d Full remission at follow-up was defined as a HAMD score ≤ 7. e Patients made at least one suicide attempt in the past two years. The improvement percentages and full remission percentages among the different groups at the two-year follow-up.a,b,c