Cocaine use in the workplace doubled in the fourth quarter from the year-earlier period while marijuana still remained the drug of choice.

Among employees and job applicants tested for drugs, 0.4 percent tested positive for cocaine during the final three months of the year, according to a report Tuesday by Honolulu-based Diagnostic Laboratory Services Inc. That's up from 0.3 percent in the third quarter and double the 0.2 percent who tested positive for the drug in the fourth quarter of 2014.

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