Background: Twenty to twenty two percent of work related accidents have a d
irect or indirect relationship with recent alcohol use. Aim: To detect rece
nt alcohol or drug use in patients who required hospitalization for severe
work related accidents. Patients and methods: blood and urine samples were
obtained from patients admitted to a hospital within 6 hours of an accident
severe enough to require hospitalization. Blood alcohol and urinary metabo
lites of cocaine, marijuana, amphetamines and benzodiazepines were measured
. Patient identity was kept confidential throughout the study. Once patient
s were stabilize, they were interviewed by a psychologist that was blind to
laboratory results. Results: Two hundred thirty men and 18 women were stud
ied and 29% (30% of men and 17% of women) had recent use of alcohol or drug
s was found in 21% of professional, in 33% of other occupational levels, ha
lf of agricultural workers and 25% of commerce workers. Only two of 60 posi
tive cases, admitted substance use during the interview. Most of negative c
ases admitted the use of alcohol or other drugs during the month prior to t
he accident. Conclusions: Recent use of alcohol and drugs is frequent among
severe work related accident victims. Probably, a high proportion of these
subjects are problem drinkers. The combination of alcohol and benzodiazepi
nes is an additional risk factor.