10.2190/0DL9-5Y81-5C1J-XCT9 0DL95Y815C1JXCT9 3 Drug-Testing Programs and Their Impact on Workplace Accidents: A Time-Series Analysis 295 306 20020509 20020509 20020509 20020509 0DL95Y815C1JXCT9.pdf http://baywood.metapress.com/link.asp?target=contribution&id=0DL95Y815C1JXCT9 4 Frank S. Lockwood Brian S. Klaas John E. Logan William R. Sandberg University of South Carolina, Columbia Using a time-series design, this study examined the impact of introducing drug-testing programs on a workplace accidents. Using data from three separate hotels, we examined the impact associated with preemployment testing programs and the impact associated with programs that included both preemployment and random testing. The results of interrupted time-series analysis suggest that the introduction of preemployment testing did not affect the trend line for workplace accidents. However, the introduction of a program including both preemployment and random testing was associated with a significant reduction in workplace accidents resulting from a downward shift in the trend line for accidents. The implications for the design of drug-free workplace programs are discussed, as are the implications for future research.