Rebecca Goldin

Statistics Happen

On the heels of a survey conducted by the University of Michigan, the media has sent mixed or incorrect messages to the public about teen use of cigarettes, alcohol, and other drugs. While long-term trends in increases or decreases in smoking and drug use can be measured with this survey, many changes from 2003 to 2004 were not statistically significant.

Despite this, the findings were reported – if not trumpeted – by the media as if they had great meaning. Worse yet, by emphasizing which drugs are being used by current drug users – and neglecting the larger context – the public is misled about drug abuse by teens.

USA Today, for example, headlined its report with "Survey: More teens using Oxycontin."

Sure, the percentages of 12th-graders reporting having used Oxycontin went from 4 percent in 2002 to 4.5 percent in 2003, and now to 5 percent in 2004. The 1 percent increase from 2002 to 2004 is statistically significant. However, highlighting this small-yet-noteworthy increase in Oxycontin use over this two-year period (an increase that was not noted in 8th or 10th grades) eclipses the brighter picture of drug use among teens: Since 2002, the use of illicit drugs in the last year has declined by 2.2 percent among 12th graders.

The increase in Oxycontin use may be more accurately described as a gain in popularity among drug users. In the same time period, the use of LSD any time over the past year went down 1.3 percent, and the use of ecstasy went down 3.4 percent among 12th graders. Perhaps those who have used Oxycontin this year would have used LSD two years ago; these shifts in drug popularity are not indicative of more teens becoming addicted to, or even trying, illicit drugs.

Another source for confusion were the reports on smoking. The Associated Press heralded "progress" in preventing teen smoking by leading with "Federal study finds modest drop in teen drug use, smoking in 2004." Indeed, smoking has been reduced significantly since the early 90s, but the changes from 2003 to 2004 are almost entirely insignificant. The survey asked students four relevant questions about smoking:

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The Suicide Myth

The controversy over prescribing antidepressants to children and teenagers deepened recently, when a Food and Drug Administration (FDA) advisory committee recommended that the agency issue a "black box" warning to doctors about the increased risk of suicidal behavior from taking such drugs.

The panel tried to weigh the risk of suicide from taking antidepressants against the risk from not taking antidepressants. But the evidence under consideration was insufficient to draw easy or strong conclusions, thus making the issue a complicated one for the public to understand.

To make matters worse, the media did not always promote a consistent story about these risks. For instance, the New York Times reported that,

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