What underlies the broad acceptance of a practice that conservative Supreme Court Justice Antonin Scalia has called a "needless indignity"? One factor may be the alarming statistics cited by testing advocates to demonstrate the high costs of drug abuse. Examination of some of these claims suggests they do not always accurately reflect the research on which they are based. In fact, some of the data could be used to "prove" that drug use has negligible or even beneficial effects. Consider these examples.
The study grew out of a survey of some 3,700 households by the Research Triangle Institute (RTI) in 1982. The RTI group found that the average reported income of households with at least one person who admitted to having ever used marijuana daily (20 days or more in a 30-day period) was 28 percent lower than the average reported income of otherwise similar households. The RTI researchers defined that difference in income as "loss due to marijuana use"; the total loss, when extrapolated to the general population, came to $26 billion. The researchers then added on the estimated costs of drug-related crime, health problems and accidents to arrive at a grand total of $47 billion for "costs to society of drug abuse." This figure - "adjusted" to account for inflation and population increase - represents the basis of Bush's statement, according to Henrick J. Harwood, who headed the RTI study and is now in the White House drug-policy office.
The RTI survey included questions on current drug use (at least once within the past month). Yet according to Harwood there was no significant difference between the income of households with current users of any illegal drug - including marijuana, cocaine and heroin - and the income of otherwise similar households. Does this mean that current use of even hard drugs - as opposed to perhaps a single marijuana binge in the distant past - does not lead to any "loss"? "You would be on safe ground saying that," Harwood replies.
In fact, the study on which the claim is based has "nothing to do with [illegal] drug users," according to a 1988 article in the University of Kansas Law Review by John P. Morgan of the City University of New York Medical School. Morgan, an authority on drug testing, has traced the Chamber of Commerce claim to an informal study by the Firestone Tire and Rubber Company of employees undergoing treatment for alcoholism.
What may be surprising is that, according to a report published by NIDA last year, Utah Power and Light actually "spent $215 per employee per year less on the drug abusers in health insurance benefits than on the control group." Those who tested positive at Georgia Power had a higher promotion rate than the company average. Moreover, Georgia workers testing positive only for marijuana (about 35 percent of all positives) exhibited absenteeism some 30 percent lower than average. Nationwide, Morgan says, marijuana accounts for up to 90 percent of all positive findings, both because it is by far the most widely used illegal drug and because it persists in urine for up to a month (compared with two days for most other drugs).
This study may be distorted by more subtle biases - related to race, age or gender - than those displayed by the utility studies, according to Theodore H. Rosen, a psychologist and a consultant on drug testing. Indeed, Jacques L. Normand, who headed the study, acknowledges that minority postal workers tested positive at a much higher rate than nonminority workers and that previous studies have shown minorities to have higher absenteeism.
Morgan points out, moreover, that the Postal Service study (like all those cited above) has not been published in a peer-reviewed journal. In fact, he says, only one study comparing the work of drug-test positives and negatives has passed peer review. Last year, in the Journal of General Internal Medicine, David C. Parish of the Mercer University School of Medicine in Georgia reported on a study of 180 hospital employees, 22 of whom had tested positive after being hired. Parish examined supervisor evaluations and other indexes and found "no difference between drug-positive and drug-negative employees" at the end of one year. He noted, however, that 11 of the negatives had been fired during that period and none of the positives.
To be sure, a subset of this group of current users is increasing: NIDA estimated that from 1985 to 1988 the number of people using cocaine at least once a week rose from 647,000 to 862,000 and daily users increased from 246,000 to 292,000. NIDA found that addiction to cocaine (including "crack") is particularly severe among the unemployed - who are beyond the reach of workplace testing.
Clearly, the U.S. has a drug-abuse problem. Could it be that neither indiscriminate testing of workers - which could cost upward of $500 million this year - nor the dissemination of alarmist information by testing advocates is helping to resolve that problem?
-- John Horgan
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