According to a new study by the Workers Compensation Research Institute (WCRI), there has been a noticeable decrease in the amount of opioids prescribed per workers' compensation claims in a majority of study states, coinciding with reforms directed at opioid use. The study, "Interstate Variations in Use of Opioids," examines interstate variations and trends in the use of opioids and prescribing patterns of pain medications across 25 states. The study compares the amount of opioids prescribed per claim over two roughly 24-month periods of time ending March 2012 and March 2014. It found that the amount of opioids received by injured workers decreased over the two time periods in the majority of the study states. Statistically significant reductions in the range of 20 to 31 percent were seen in Maryland, Massachusetts, Michigan, Oklahoma, North Carolina and Texas. It also found that opioid use was prevalent among nonsurgical claims with more than seven days of lost time. About 65 to 80 percent of these injured workers with pain medications received opioids in most states.