Outcomes After Injection-Based Therapy: A Pain Outcomes Questionnaire for Veterans Univariate Analysis

Abstract

Background: The Pain Outcomes Questionnaire-For Veterans (POQ-VA) was developed within the Veterans Health Administration (VHA) as a brief but psychometrically sound pain outcomes instrument that assesses key domains. In routine clinical practice, it is valid and reliable for evaluating effectiveness of treatment of chronic noncancer pain in veterans. We hypothesized that POQ-VA scores would improve across multiple domains in the veteran population following injection-based interventional treatment for chronic pain.

Methods: We aggregated all available POQ-VA reports from veterans who underwent ≥ 1 interventional pain procedures between April 1, 2009 and April 1, 2019. Patients were included who had pre- and posttreatment POQ-VA results separated by ≤ 6 months (N = 112). A paired-samples t test was used to compare means, standard deviations, and ranges for each POQ-VA domain. Individual question responses were analyzed using a nonparametric Wilcoxon matched-pairs signed-rank test.

Results: All POQ-VA domains showed a statistically significant decrease posttreatment (P ≤ .03). Directionally, the responses to 17 of 20 individual POQ-VA questions reflect a small but statistically significant positive treatment response (P < .04).

Conclusions: Most veterans undergoing injection therapy for chronic pain had statistically significant improvements in POQ-VA measures within a 6-month period. To conduct more rigorous, multivariate studies, continued and widespread use of the POQ-VA instrument is warranted.