The risk of treated anxiety and treated depression among patients with psoriasis and psoriatic arthritis treated with apremilast compared to biologics, DMARDs and corticosteroids: a cohort study in the United States MarketScan database.

BACKGROUND

Anxiety and depression are common among psoriasis and psoriatic arthritis (PsA) patients, but rates may differ by treatment.

OBJECTIVE

To quantify the risk of incident treated anxiety, depression and mixed anxiety + depression in users of apremilast compared with users of other treatments for psoriasis and PsA.

METHODS

We conducted two separate cohort studies of psoriasis and PsA patients treated with apremilast, tumour necrosis factor inhibitor biologics, interleukin-17, -23 or -12/23 inhibitor biologics, conventional DMARDs or systemic corticosteroids in the United States MarketScan database. Cohort entry was date of first study drug after 21 March 2014. We identified cases who had a depression and/or anxiety diagnosis with a prescription for antidepressant/antianxiety medication within 30 days of the diagnosis code. We calculated incidence rates (IRs) and incidence rate ratios with 95% confidence intervals (CIs) for treated anxiety, treated depression and treated anxiety + depression per 1000 patient-years (PY) among patients.

RESULTS

Among the psoriasis cohort, IRs for each outcome were similar between exposure categories and highest among users of systemic corticosteroids alone. IRs (95% CI) for apremilast alone were 9.2 (6.6-12.5), 4.6 (2.8-7.1) and 4.6 (2.8-7.1) per 1000 PY for treated anxiety, treated depression and treated anxiety + depression, respectively. In the PsA cohort, the rate of anxiety was highest among users of apremilast alone; rates of depression and anxiety + depression were similar for apremilast compared with other PsA treatments. IRs for each outcome were also high for users of corticosteroids in both the psoriasis and PsA cohorts.

CONCLUSIONS

Among patients with psoriasis, users of apremilast had similar rates of anxiety and depression as users of other non-corticosteroid systemic psoriasis treatments. Among PsA patients, users of apremilast had similar rates of depression and anxiety + depression compared with users of other systemic non-corticosteroid PsA drugs; however, the rate of anxiety was slightly higher.