Natural history of opioid dosage escalation post-injury: a cohort study of injured workers in the State of Louisiana

Dose Escalations Among Workers' Compensation Claimants Using Opioid Medications-An 8 Year Postinjury Follow up Study

OBJECTIVE

The aim of the study is to determine the morphine equivalent dose in milligrams (MED)/day escalation trend after initial utilization.

METHODS

A total of 25,108 lost time claims filed between 1998 and 2007 were followed for 8 years from injury date. Claims were stratified by initial MED/day at 3 months after injury into four groups (0, 1 to < 15, 15 to < 30, and ≥30 MED/day). The slopes in MED/year of opioid dose escalation were determined for each initial MED/day group.

RESULTS

The slopes of MED/day escalation by initial MED categories were similar ( P ≥ 0.05) ranging from 5.38 to 7.76 MED annually. On average, MED/day increased in a liner pattern with a slope at 6.28 MED/year ( P < 0.01).

CONCLUSIONS

Opioid MED/day increased in a linear pattern, regardless of initial MED/day dose.

Early Drug Prescription Patterns as Predictors of Final Workers Compensation Claim Costs and Closure: An Updated Analysis on an Expanded Cohort

OBJECTIVE

The aim of the study is to determine the associations of workers' compensation claim costs and return to work with drugs prescribed for early symptom management.

METHODS

Claims filed from 1998 to 2007 were followed for 10 years from the injury date. Drugs analyzed included gabapentin, pregabalin, antipsychotics, antidepressants, sedatives, benzodiazepines, carisoprodol, and opioids, controlling for initial reserve, sex, age, physical therapy, attorney involvement, and surgery.

RESULTS

Gabapentin, antipsychotics, antidepressants, and sedatives used in the first 3 months after injury were significantly associated with higher claim cost (≥$100,000). All opioid morphine equivalent doses greater than or equal to 5 mg/d for the first 6 months was significantly associated with higher cost (≥$100,000) and not being released to work at end of third year after injury with dose-response relationships.

CONCLUSIONS

Prescription patterns in the first 3 months or first 6 months of workers' compensation claim development may be used as predictors of claim outcomes.

Using prescription opioids throughout a traumatic injury recovery: A qualitative exploratory study of adolescents in a Midwestern state

BACKGROUND

Injury is one of the most common reasons adolescents are prescribed opioids. Little is known about adolescent experiences who used prescription opioids throughout their recovery from traumatic injury.

METHODS

We used a qualitative exploratory study design nested within a longitudinal cohort study conducted at two trauma hospitals in the United States. We conducted semi-structured telephone interviews with adolescents (n = 28) aged from 12 to 20 years at the time of their hospital admission for injury. We used purposive sampling to gather a broad range of experiences from the longitudinal patient cohort. We conducted a modified thematic analysis of transcribed interviews.

RESULTS

Adolescents reported a wide range of efficacy with which prescription opioids controlled their pain during the injury recovery and numerous opioid-related side effects. A desire for relief from acute pain caused by the injury was the most common driver for using opioids in the hospital. At home, adolescents' decisions to use opioids were influenced by family history of addiction, awareness of harms associated with opioids, and desire to challenge themselves. Adolescents reported closely adhering to a prescribed regimen or using fewer opioids than prescribed while recovering at home. Finally, adolescents reported considerable variability in parental involvement in prescription opioid use, ranging from giving adolescents unrestricted access to prescription opioids to complete parental discretion and administration upon request.

CONCLUSIONS

Adolescents had diverse experiences with prescription opioids during recovery from traumatic injury. Educational interventions that focus on the appropriate use of opioids to address pain care needs among adolescents with traumatic injuries are urgently needed.

Trends in the Utilization and Dose of Gabapentinoids in Combination With Opioids in an Injured Worker Population Between 2008 and 2018

OBJECTIVE

To determine long term (11 year) trends in gabapentin and pregabalin prescribing among workers' compensation claimants at various opioid dose combinations (low, medium, high, and very high) in Louisiana.

METHOD

A longitudinal study of 18,737 claimants who filled any prescriptions between 2008 and 2018.

RESULTS

The proportion of claimants prescribed opioids alone at all dose levels decreased dramatically. The proportion claimants prescribed the combination of low dose opioids and low dose gabapentinoids increased (7.7% to 10.9%). Prescribing higher daily doses of gabapentinoids was associated with higher daily doses of opioids. Gabapentinoid prescribing was associated with continued prescribing of medium and high dose opioids as claims matured.

CONCLUSIONS

Overall opioid prescribing decreased over time, while prescribing low dose opioids with gabapentinoids, increased.

Prevention, Medical Management, and Adjudication of Workplace Injuries: A Thirty-Two Year Follow-up of an Integrated Workers' Compensation Program

OBJECTIVE

To describe the cost outcomes of an integrated workers' compensation program.

METHODS

We studied a population that increased from 20K to 59K, incurring 8807 lost-time claims between 1988 and 2020.

RESULTS

Lost-time claims decreased from 22.15 to 4.32 per 1000 employees (1988 to 2020), and total closed lost-time claim costs per $100 payroll, decreased from $0.62 to $0.17 (1988 to 2017). The percent of claims resolved within 3 years of the accident increased from 10% to 89% (1988 to 2017). Adjusting for medical inflation and wage increases, total workers' compensation benefits paid per claim decreased $124 per year, medical benefits decreased $45 per year and indemnity benefits decreased $79 per year.

CONCLUSION

On both a population (per employee) and on a per claim basis, workers' compensation costs decreased substantially, which is attributable to improvements in accident prevention and decreases in claim duration.

Determining the influence of the Workers Compensation Board of Manitoba's opioid policy on prescription opioid use amongst WCB recipients

BACKGROUND

Opioid medications are commonly used by Workers Compensation Board (WCB) claimants following workplace injuries. The purpose of this study is to describe the impact of an opioid management policy on opioid prescriptions amongst a WCB-covered population compared to changes in the use of these medications in the general population of a Canadian province.

METHODS

We linked WCB claims data from 2006 to 2016 (13,155 claims, 11,905 individuals) to Manitoba provincial health records and compared opioid use amongst this group to 478,606 individuals aged 18-65. Linear regression was performed to examine the change over time in number of individuals being prescribed opioids for various durations and dosages of 50 or more, and 120 or more morphine equivalents (ME)/day for both the WCB and Manitoba population.

RESULTS

WCB claimants totaled 2.5% of Manitoba residents aged 18-65 who were prescribed opioids for non-cancer pain. After the introduction of the opioid use policy for the WCB population in November 2011, the number of people prescribed opioids declined 49.4% in the WCB group, while increasing 10.8% in the province as a whole. The number of individuals using 50 ME/day or more declined 43.1% in the WCB group and increased 5.8% in the province.

CONCLUSIONS

Opioid management programs organized by a compensation board can lead to a substantial reduction in the prescription of opioid medications to a WCB client population, including individuals who were prescribed higher doses of these medications when compared with general trends in the community.

Long-term prescription opioid utilization, substance use disorders, and opioid overdoses after adolescent trauma

BACKGROUND

Injured adolescents have a 56% increased risk of developing a substance use disorder (SUD) within 3 years of their injury. The transition from medical prescription opioid use to nonmedical use in adolescent trauma patients has not been longitudinally studied long-term. The aim of this study is to describe 5-year patterns of opioid use in a cohort of injured adolescents as well as the proportion of patients experiencing overdose and SUD diagnoses.

METHODS

Our retrospective cohort study consisted of 736 patients aged 12 years to 18 years who were admitted for trauma from 2011 to 2013. We examined up to 5 years of regional health information exchange data containing information on prescription fills as well as diagnoses from inpatient, outpatient, and emergency department encounters.

RESULTS

At 1 year, over 20% of adolescents filled more than two opioid prescriptions after being discharged for their injury; and at 4 years, over 13% had received more than eight opioid fills. Over the 5-year period, 11% received an opioid antagonist injection, 14% received an SUD diagnosis, and 8% had an overdose diagnosis. Relatively few patients had diagnoses for other mental health conditions including depression (5.5%), posttraumatic stress disorder (2.1%), and chronic pain (3.6%).

CONCLUSION

Opioid usage remains high for multiple years in a subset of the adolescent trauma population. Mental health diagnosis rates were substantially lower in injured adolescents than what has been reported in adults. However, overdose and SUD diagnoses occur in over 1 in 10 adolescents within 5 years of their injury.

LEVEL OF EVIDENCE

Prognostic and epidemiological study, level IV.

Effect of an opioid management program for Colorado workers' compensation providers on adherence to treatment guidelines for chronic pain

OBJECTIVE

The aim of this study was to examine adherence of state guidelines for Colorado workers' compensation physicians/providers treating individuals as injured workers with chronic pain after initiation of an opioid management program and provider incentives.

METHODS

A retrospective cohort of chronic, non-cancer pain claims was constructed from the Colorado's workers' compensation database. Adherence to treatment guidelines and opioid prescribing practices were evaluated during implementation of a new billing code to incentivize adherence.

RESULTS

Overall, less than 33% of claims showed evidence of opioid management. Comprehensive opioid management was observed in only 4.4% of claims. In 2010, after implementing the new billing code, the ratio of long acting opioids to short acting opioids decreased from 0.2 to 0.13; returning to 0.2 in one year. Similarly, morphine equivalent doses declined for a short period.

CONCLUSIONS

Incentivizing physicians to adhere to chronic pain management guidelines only temporarily improves prescribing practices.

Work Enabling Opioid Management

OBJECTIVE

This study describes the relationship between opioid prescribing and ability to work.

METHODS

The opioid prescription patterns of 4994 claimants were studied. Three groups were constructed: 1) at least 3 consecutive months prescribed (chronic opioid therapy; COT); 2) less than 3 consecutive months prescribed (acute opioid therapy; AOT); and 3) no opioids prescribed. Variables included sex, age, daily morphine equivalent dose (MED), days opioids were prescribed, temporary total days (TTDs), and medical/indemnity/total costs.

RESULTS

The COT versus AOT claimants had higher opioid costs ($8618 vs $94), longer TTD (636.2 vs 182.3), and average MED (66.8 vs 34.9). Only 2% of the COT cohort were not released to work. Fifty-seven percent of patients in the COT category (64 of 112) were released to work while still receiving opioids.

CONCLUSION

COT does not preclude ability to work when prescribing within established guidelines.

Preventing Opioid Use Disorders among Fishing Industry Workers

Fishing industry workers are at high risk for work-related musculoskeletal disorders (MSDs) and injuries. Prescription opioids used to treat pain injuries may put these workers at increased risk for developing substance disorders. Using a Community-Based Participatory Research approach, formative research was conducted to inform the eventual development of relevant interventions to prevent and reduce opioid use disorders among fishing industry workers. Qualitative interviews (n = 21) were conducted to assess: knowledge and attitudes about opioid use disorders; features of fishing work that might affect use and/or access to treatment; and community and organizational capacity for prevention and treatment. Participants reported numerous pathways connecting commercial fishing with opioid use. The combination of high stress and physically tasking job duties requires comprehensive workplace interventions to prevent chronic pain and MSDs, in addition to tailored and culturally responsive treatment options to address opioid use disorders in this population. Public health programs must integrate workplace health and safety protection along with evidence-based primary, secondary, and tertiary interventions in order to address opioid use disorders, particularly among workers in strenuous jobs.

Is Obesity Associated With Adverse Workers' Compensation Claims Outcomes?

BACKGROUND

A pilot study indicated that obesity was associated with an increased time lost from work and higher costs among workers' compensation claimants sustaining severe, but not minor injuries.

OBJECTIVE

The aim of this study was to further test the hypotheses by increasing sample size and controlling for additional confounding factors.

METHOD

Cost and lost time outcomes were assessed for 2301 lost time workers' compensation claims filed in 2011 and 2012 followed to the end of the first quarter of the third postinjury year.

RESULT

Adjusting for gender, age, marital status, attorney involvement, and spinal procedures, the odds ratios of incurring a claim expense at least $100,000 after a severe injury for an overweight or obese versus normal weight claimant was 2.11 [95% confidence interval (95% CI): 1.04 to 4.29] and 2.23 (95% CI:1.12-4.46), respectively.

CONCLUSION

Obesity was associated with increased costs among workers' compensation claimants sustaining severe, but not minor injuries.

A Seven-Year Longitudinal Claim Analysis to Assess the Factors Contributing to the Increased Severity of Work-Related Injuries

BACKGROUND

In recent decades, the frequency of Medical Only (MO) and Lost Time (LT) workers' compensation claims has decreased, while average severity (medical and indemnity costs) has increased.

OBJECTIVE

The aim of this study was to compare claim frequency, mix, and severity (cost) over two periods using a claim cohort follow-up method.

METHODS

Sixty-two thousand five hundred thirty-three claims during two periods (1999 to 2002 and 2003 to 2006) were followed seven years postinjury. Descriptive analysis and significant testing methods were used to compare claim frequency and costs.

RESULTS

The number of claims per $1 M of premium decreased 50.4% for MO claims and 35.6% for LT claims, consequently increasing the LT claim proportion. The average cost of LT claims did not increase.

CONCLUSION

The severity increase is attributable to the proportional change in LT and MO claims. While the number of LT claims decreased, the inflation-adjusted average cost of LT claims did not increase.

Effect of physician-dispensed medication on workers' compensation claim outcomes in the state of Illinois

OBJECTIVE

To evaluate differences between physician-dispensed and non-physician-dispensed medication with regard to lost time, prescription volume, and pharmaceutical, medical, indemnity costs in the Illinois workers' compensation system.

METHODS

We studied a sample of 6824 workers' compensation indemnity claims that were opened and closed between January 1, 2007, and December 31, 2012, by Accident Fund Holdings in the State of Illinois.

RESULTS

The number of prescriptions per claim and pharmaceutical, medical, and indemnity costs, as well as time out from work, were significantly higher in claims where a pharmaceutical was dispensed by the physician within 90 days of injury than in claims where physician dispensing did not occur. These differences persisted controlling for age, sex, attorney involvement, and injury complexity.

CONCLUSION

Physician dispensing is associated with higher costs and more lost time than pharmacy-dispensed medications in workers' compensation claims.

Proportion of opioid use due to compensated workers' compensation claims in Manitoba, Canada

Background

This study identifies the percentage of opioids prescribed for compensated workplace conditions in Manitoba, Canada and whether Workers Compensation Board (WCB) status is associated with higher prescription opioid doses.

Methods

Opioid prescriptions for WCB recipients were linked with databases housed at the Manitoba Center for Health Policy. Duration of continuous opioid prescription and morphine equivalents (ME) per day (ME/D) were calculated for individuals age 18–65.

Results

Over the period from 1998 to 2010, 3.8% of the total opioid dosage of medication prescribed in the study population were prescribed to WCB recipients. WCB recipients accounted for 2.1% of the individuals prescribed opioids. In adjusted analyses WCB recipients were more likely to be prescribed over 120 ME/D (OR 2.06 95% CI, 1.58–2.69).

Conclusions

WCB recipients account for a small, but significant amount of the total opioid prescribed in Manitoba. Manitoba's WCB population is a group at increased risk of being prescribed over 120 ME/day. Am. J. Ind. Med. 58:33–39, 2015. © 2014 The Authors. American Journal of Industrial Medicine Published by Wiley Periodicals, Inc.

Endogenous opiates and behavior: 2013

This paper is the thirty-sixth consecutive installment of the annual review of research concerning the endogenous opioid system. It summarizes papers published during 2013 that studied the behavioral effects of molecular, pharmacological and genetic manipulation of opioid peptides, opioid receptors, opioid agonists and opioid antagonists. The particular topics that continue to be covered include the molecular-biochemical effects and neurochemical localization studies of endogenous opioids and their receptors related to behavior, and the roles of these opioid peptides and receptors in pain and analgesia; stress and social status; tolerance and dependence; learning and memory; eating and drinking; alcohol and drugs of abuse; sexual activity and hormones, pregnancy, development and endocrinology; mental illness and mood; seizures and neurologic disorders; electrical-related activity and neurophysiology; general activity and locomotion; gastrointestinal, renal and hepatic functions; cardiovascular responses; respiration and thermoregulation; and immunological responses.

Changes in opioid prescribing for Washington workers' compensation claimants after implementation of an opioid dosing guideline for chronic noncancer pain: 2004 to 2010

An opioid overdose epidemic emerged in the United States following increased opioid prescribing for chronic noncancer pain. In 2007, Washington State agencies implemented an opioid dosing guideline on safe prescribing for chronic noncancer pain. The objective of this population-based observational study was to evaluate opioid use and dosing before and after guideline implementation. We identified 161,283 workers aged 18 to 64 years with ≥1 opioid prescriptions in Washington Workers' Compensation, April 1, 2004, to December 31, 2010. Prevalence and incidence rates of opioid use were assessed. We compared pre- and postguideline chronic and high-dose use (≥120 mg/d) among incident users. The mean monthly prevalence of opioid use declined by 25.6% between 2004 (14.4%) and 2010 (10.7%). Fewer incident users went on to chronic opioid therapy in the postguideline period (4.7%; 95% confidence interval [CI], 4.5-5.0%) than in the preguideline period (6.3%; 95% CI, 6.1-6.6%). Compared with preguideline incident users, postguideline incident users were 35% less likely to receive high doses (adjusted odds ratio = .65; 95% CI, .59-.71). Although the extent to which decreases were due to the guidelines is uncertain, to our knowledge, this is the first report of significant decreases in chronic and high-dose prescription opioid use among incident users.

PERSPECTIVE

Evidence-based strategies for opioid risk management are needed to help abate the epidemic of opioid-related morbidity and mortality. The study findings suggest that opioid dosing guidelines that specify a "yellow flag" dosing threshold may be a useful tool in preventing escalation of doses into ranges associated with increased mortality risk.

Risk of adverse health outcomes with increasing duration and regularity of opioid therapy

PURPOSE

The purpose of this study was to examine trends in frequency and daily dosage of opioid use and related adverse health outcomes in a commercially insured population.

METHODS

We examined medical claims from the Truven Health MarketScan commercial claims database for 789,457 continuously enrolled patients ages 18 to 64 years to whom opioids were dispensed during the first half of 2008. We tracked them every 6 months until either opioid use was discontinued or the end of 2010. We compared outcomes among all opioid users with those for patients who used opioids with only limited interruptions during the index period, referred to as "daily users." We contrasted the experience of daily users, other users, and nonusers for various outcomes.

RESULTS

Of all claimants, 10.7% had at least one opioid prescription during the first 6 months of 2008. Of these, 39.9% continued through a second 6-month period, and 18.0% continued through the end of 2010. Only 9.0% of all users qualified as daily users, but 87.1% of them continued some use of opioids through the end of 2010. Only 43.8% of all users who continued use through 2010 initially qualified as daily users. Among all users who continued use through 2010, days of use and daily dosage increased with duration of use. Among daily users, only dosage increased, rising from 101 to 114 morphine milligram equivalents/day over the 3 years. The prevalence of benzodiazepine use was greater for daily than all users, exceeding 40% among daily users who continued opioid use for 3 years. Drug abuse and overdose rates increased with longer use. Daily users accounted for 25.0%, other users for 43.6%, and nonusers for 31.4% of opioid analgesic overdoses.

CONCLUSIONS

Adverse health outcomes can increase with accumulating opioid use and increasing dosage. Existing guidelines developed by specialty societies for managing patients using opioids daily or nearly daily do not address the larger number of patients who use opioids intermittently over periods of years. Practitioners should consider applying such guidelines to patients who use opioids less frequently.