A record review found imperfect agreement between documented history and urine screens. A mismatch did not independently establish deception or a clinically significant exposure.
Among 153 hospitalized adults with opioid use disorder, overall agreement across substance-history and screen pairs was 81.3 percent. Benzodiazepine agreement was sixty-six percent.
A substantial portion involved a positive screen without a corresponding positive history. Other categories showed different mismatch patterns, reflecting differences in exposure and testing.
Documentation, recall, detection windows, assay coverage, treatment before sampling, and unrecognized co-exposures may all affect agreement. The retrospective single-center design limits broader estimates.
The study cannot establish that every unreported positive was intentional concealment or that every negative excluded use. Forensic interpretation should retain specimen and medication timing, exact assay, history wording, and confirmatory evidence. Agreement is a relationship between two imperfect records, rather than a direct measure of honesty, impairment, or the precise substance taken.
Original analysis of the supplied journal article, identified as PMC7015152.