Clinical toxicology (Philadelphia, Pa.) · 2008
Reliability of self-reported use of amphetamine, barbiturates, benzodiazepines, cannabinoids, cocaine, methadone, and opiates among acutely hospitalized elderly medical patients.
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Glintborg Bente, Olsen Lenette, Poulsen Henrik, Linnet Kristian, Dalhoff Kim
Аннотация
BACKGROUND: Undisclosed use of illicit drugs and prescription controlled substances is frequent in some settings. The aim of the present study was to estimate the reliability of self-reported use of amphetamine, barbiturates, benzodiazepines, cannabinoids, cocaine, methadone, and opiates among acutely hospitalized medical patients.
METHODS: Patients admitted to an acute medical department were interviewed about their drug use. Patients provided blood and urine samples for drug analysis. Results of a toxicology screen were compared to self-reported drug use. Toxicology screens positive for drugs not reported during the interview were only considered truly positive after verification by a substance specific analysis.
RESULTS: Five hundred patients were included. The median age was 72 years and 298 (60%) were female. In total, 103 patients (21%) reported use of opiates and 65 patients (13%) used benzodiazepines. Only 8 patients reported use of illicit drugs (cannabinoids, 2%). Toxicology analyses were performed in a randomly selected sub-sample of 100 patients. Among 27 patients (27%), the analyses indicated use of one or more drugs, mainly benzodiazepines (15 patients), morphine (12 patients) or cannabinoids (5 patients). Another 6 patients had screenings unexpectedly positive for opiates, but the verification analysis indicated use of codeine-containing drugs. The overall sensitivity of self-reports in detecting drug use was 66%. The negative predictive value of a patient not reporting use of a drug was over 90% for all 7 drug-types screened.
CONCLUSION: Among 100 randomly selected mainly elderly medical patients, undeclared use of illicit drugs was rare. However, some patients underreported use of benzodiazepines and cannabinoids.
METHODS: Patients admitted to an acute medical department were interviewed about their drug use. Patients provided blood and urine samples for drug analysis. Results of a toxicology screen were compared to self-reported drug use. Toxicology screens positive for drugs not reported during the interview were only considered truly positive after verification by a substance specific analysis.
RESULTS: Five hundred patients were included. The median age was 72 years and 298 (60%) were female. In total, 103 patients (21%) reported use of opiates and 65 patients (13%) used benzodiazepines. Only 8 patients reported use of illicit drugs (cannabinoids, 2%). Toxicology analyses were performed in a randomly selected sub-sample of 100 patients. Among 27 patients (27%), the analyses indicated use of one or more drugs, mainly benzodiazepines (15 patients), morphine (12 patients) or cannabinoids (5 patients). Another 6 patients had screenings unexpectedly positive for opiates, but the verification analysis indicated use of codeine-containing drugs. The overall sensitivity of self-reports in detecting drug use was 66%. The negative predictive value of a patient not reporting use of a drug was over 90% for all 7 drug-types screened.
CONCLUSION: Among 100 randomly selected mainly elderly medical patients, undeclared use of illicit drugs was rare. However, some patients underreported use of benzodiazepines and cannabinoids.