Large posttraumatic stress disorder improvement and antidepressant medication adherence

Area of Science:

• Mental Health
• Pharmacology
• Clinical Research

Background:

• Patients with posttraumatic stress disorder (PTSD) often exhibit poor antidepressant medication (ADM) adherence.
• The relationship between PTSD symptom improvement and ADM adherence is not well-established.

Purpose of the Study:

• To determine if clinically significant reductions in PTSD symptoms are associated with improved ADM adherence.
• To investigate the impact of PTSD symptom reduction on medication adherence in a veteran population.

Main Methods:

• Utilized electronic health records from 742 Veterans Health Affairs (VHA) patients diagnosed with PTSD.
• Defined clinically meaningful PTSD symptom reduction as a decrease of ≥20 points on the PTSD Checklist (PCL).
• Employed propensity score and inverse probability of treatment weighting to control for confounding variables.

Main Results:

• Patients achieving clinically meaningful PTSD symptom reduction were significantly more likely to be adherent to ADM (OR=1.78).
• Despite this association, overall ADM adherence remained low in both groups (53.5% with reduction vs. 39.3% without).

Conclusions:

• Substantial reductions in PTSD symptoms are associated with improved ADM adherence.
• This association may contribute to better depression outcomes, as suggested by prior research.