Design, methods, and recruitment outcomes of the Veterans' Pain Care Organizational Improvement Comparative Effectiveness (VOICE) study

Buprenorphine, Pain, and Opioid Use in Patients Taking High-Dose Long-Term Opioids: A Randomized Clinical Trial

Importance

Guidelines recommend dose reduction or discontinuation of long-term opioid therapy when harm outweighs benefit, but strategies to help patients do so are limited.

Objective

To test optionally switching to buprenorphine as a strategy for improving pain and reducing opioids among patients prescribed high-dose, full agonist long-term opioid therapy.

Design, Setting, and Participants

In this pragmatic, multisite, 12-month randomized clinical trial with masked outcome assessment, patients treated at Veterans Affairs primary care clinics were recruited from October 2017 to March 2021, with follow-up completed June 2022. Eligible patients had moderate to severe chronic pain despite high-dose opioid therapy (≥70 mg/d for at least 3 months). Patients were randomized to having the option to switch to buprenorphine or not having the option to switch.

Interventions

The buprenorphine option was discussed with eligible patients as part of a larger trial of collaborative pain care interventions. Those who switched had structured follow-up to optimize dosing and address adverse effects.

Main Outcomes and Measures

The primary outcome was Brief Pain Inventory total score at 12 months. The main secondary outcome was opioid dose in morphine milligram equivalents at 12 months.

Results

Of 207 included participants, 185 (89.4%) were male, and the mean (SD) age was 60.9 (10.2) years. A total of 104 were randomized to the buprenorphine option and 103 to the no buprenorphine option. In the buprenorphine option arm, 27 participants (26.0%) switched. Over 12 months, the mean (SD) Brief Pain Inventory score improved from 6.8 (1.5) to 6.1 (1.9; adjusted mean difference [AMD], -0.59; 95% CI, -0.89 to -0.29) in the buprenorphine option arm and from 6.8 (1.6) to 6.3 (1.7; AMD, -0.50; 95% CI, -0.81 to 0.20) in the no option arm (between-group AMD, -0.09; 95% CI, -0.52 to 0.34). Over 12 months, mean (SD) opioid dosage decreased from 157 (75) mg/d to 94 (98) mg/d in the buprenorphine option arm (AMD, -61.0 mg/d; 95% CI, -74.1 to -47.9) and from 165 (88) mg/d to 107 (89) mg/d (AMD, -58.5 mg/d; 95% CI, -71.6 to -45.4) in the no option arm (between-group AMD, -2.5 mg/d; 95% CI, -21.1 to 16.0).

Conclusions and Relevance

In this trial, outcomes did not differ between groups; both had small improvements in pain and substantial reductions in opioid dosage, but the proportion of participants who switched to buprenorphine was low.

Trial Registration

ClinicalTrials.gov Identifier: NCT03026790.

Care Models to Improve Pain and Reduce Opioids Among Patients Prescribed Long-Term Opioid Therapy: The VOICE Randomized Clinical Trial

Importance

Patients prescribed long-term opioid therapy for chronic pain often experience unrelieved pain, poor quality of life, and serious adverse events.

Objective

To compare the effects of integrated pain team (IPT) vs pharmacist collaborative management (PCM) on pain and opioid dosage.

Design, Setting, and Participants

This study was a pragmatic multisite 12-month randomized comparative effectiveness trial with masked outcome assessment. Patients were recruited from October 2017 to March 2021; follow-up was completed June 2022. The study sites were Veterans Affairs primary care clinics. Eligible patients had moderate to severe chronic pain despite long-term opioid therapy (≥20 mg/d for at least 3 months).

Interventions

IPT involved interdisciplinary pain care planning, visits throughout 12 months with medical and mental health clinicians, and emphasis on nondrug therapies and motivational interviewing. PCM was a collaborative care intervention involving visits throughout 12 months with a clinical pharmacist care manager who conducted structured monitoring and medication optimization. Both interventions provided individualized pain care and opioid tapering recommendations to patients.

Main Outcomes and Measures

The primary outcome was pain response (≥30% decrease in Brief Pain Inventory total score) at 12 months. The main secondary outcome was 50% or greater reduction in opioid daily dosage at 12 months.

Results

A total of 820 patients were randomized to IPT (n = 411) or PCM (n = 409). Participants' mean (SD) age was 62.2 (10.6) years, and 709 (86.5%) were male. A pain response was achieved in 58/350 patients in the IPT group (16.4%) vs 54/362 patients in the PCM group (14.9%) (odds ratio, 1.11 [95% CI, 0.74-1.67]; P = .61). A 50% opioid dose reduction was achieved in 102/403 patients in the IPT group (25.3%) vs 98/399 patients in the PCM group (24.6%) (odds ratio, 1.03 [95% CI, 0.75-1.42]; P = .85). Over 12 months, the mean (SD) Brief Pain Inventory total score improved from 6.7 (1.5) points to 6.1 (1.8) points (P < .001) in IPT and from 6.6 (1.6) points to 6.0 (1.9) points (P < .001) in PCM (between-group P = .82). Over 12 months, mean (SD) opioid daily dosage decreased from 80.8 (74.2) mg/d to 54.2 (65.0) mg/d in IPT (P < .001) and from 74.5 (56.9) mg/d to 52.8 (51.9) mg/d (P < .001) in PCM (between-group P = .22).

Conclusions and Relevance

Outcomes in this randomized clinical trial did not differ between groups; both had small improvements in pain and substantial reductions in opioid dosage.

Trial Registration

ClinicalTrials.gov Identifier: NCT03026790.

Methods for pragmatic randomized clinical trials of pain therapies: IMMPACT statement

ABSTRACT

Pragmatic, randomized, controlled trials hold the potential to directly inform clinical decision making and health policy regarding the treatment of people experiencing pain. Pragmatic trials are designed to replicate or are embedded within routine clinical care and are increasingly valued to bridge the gap between trial research and clinical practice, especially in multidimensional conditions, such as pain and in nonpharmacological intervention research. To maximize the potential of pragmatic trials in pain research, the careful consideration of each methodological decision is required. Trials aligned with routine practice pose several challenges, such as determining and enrolling appropriate study participants, deciding on the appropriate level of flexibility in treatment delivery, integrating information on concomitant treatments and adherence, and choosing comparator conditions and outcome measures. Ensuring data quality in real-world clinical settings is another challenging goal. Furthermore, current trials in the field would benefit from analysis methods that allow for a differentiated understanding of effects across patient subgroups and improved reporting of methods and context, which is required to assess the generalizability of findings. At the same time, a range of novel methodological approaches provide opportunities for enhanced efficiency and relevance of pragmatic trials to stakeholders and clinical decision making. In this study, best-practice considerations for these and other concerns in pragmatic trials of pain treatments are offered and a number of promising solutions discussed. The basis of these recommendations was an Initiative on Methods, Measurement, and Pain Assessment in Clinical Trials (IMMPACT) meeting organized by the Analgesic, Anesthetic, and Addiction Clinical Trial Translations, Innovations, Opportunities, and Networks.

A randomized trial of collaborative support for opioid taper after trauma hospitalization

The COTAT (Collaborative Opioid Taper After Trauma) Study was a randomized trial of an opioid taper support program using a physician assistant (PA) to provide pain and opioid treatment guidance to primary care providers assuming care for adult patients with moderate to severe trauma discharged from a Level I trauma center on opioid therapy. Patients were recruited, assessed, and randomized individually by a surgery research recruitment team one to two days prior to discharge to home. Participants randomized to the opioid taper support program were contacted by phone within a few days of discharge by the PA interventionist to confirm enrollment and their primary care provider (PCP). The intervention consisted of PA support as needed to the PCP concerning pain and opioid care at weeks 1, 2, 4, 8, 12, 16, and 20 after discharge or until the PCP office indicated they no longer needed support or the patient had tapered off opioids. The PA was supervised by a pain physician-psychiatrist, a family physician, and a trauma surgeon. Patients randomized to usual care received standard hospital discharge instructions and written information on managing opioid medications after discharge. Trial results were analyzed using repeated measures analysis. 37 participants were randomized to the intervention and 36 were randomized to usual care. The primary outcomes of the trial were pain, enjoyment, general activity (PEG score) and mean daily opioid dose at 3 and 6 months after hospital discharge. Treatment was unblinded but assessment was blinded. No significant differences in PEG or opioid outcomes were noted at either time point. Physical function at 3 and 6 months and pain interference at 6 months were significantly better in the usual care group. No significant harms of the intervention were noted. COVID-19 (corona virus 2019) limited recruitment of high-risk opioid tolerant subjects, and limited contact between the PA interventionist and the participants and the PCPs. Our opioid taper support program failed to improve opioid and pain outcomes, since both control and intervention groups tapered opioids and improved PEG scores after discharge. Future trials of post-trauma opioid taper support with populations at higher risk of persistent opioid use are needed. This trial is registered at clinicaltrials.gov under NCT04275258 19/02/2020. This trial was funded by a grant from the Centers for Disease Control and Prevention to the University of Washington Harborview Injury Prevention & Research Center (R49 CE003087, PI: Monica S. Vavilala, MD). The funder had no role in the analysis or interpretation of the data.