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Why are there conflicting reports on the stats from the CDC? The CDC's website[1] says there's been a 0.6% increase in vaping in middle school and 1.5% increas

Why are there conflicting reports on the stats from the CDC? The CDC's website[1] says there's been a 0.6% increase in vaping in middle school and 1.5% increase in high school since 2011. This advisory however says "E-cigarette use among U.S. middle and high school students increased 900% during 2011-2015, before declining for the first time during 2015-2017." Was there a nearly 899% drop in 2015-2017? https://www.cdc.gov/tobacco/data_statistics/fact_sheets/youth_data/tobacco_use/index.htm https://www.cdc.gov/tobacco/data_statistics/fact_sheets/yout...

yayana 8y ago
A rise from 0.6% to 4.9%.. 0.5->5 would be 1000%. I think you misread the CDC numbers.
- nulagrithom 8y ago
  Yup! You're right.
dragonwriter 8y ago
> Why are there conflicting reports on the stats from the CDC? There aren't. > The CDC's website[1] says there's been a 0.6% increase in vaping in middle school and 1.5% increase in high school No, it doesn't. The 0.6% and 1.5% numbers appear, but as the base incidence in 2011 from which an increase occurred, not the percent increase. Quoting the relevant passage of your own source (emphasis added): “Nearly 5 of every 100 middle school students (4.9%) reported in 2018 that they used electronic cigarettes in the past 30 days—an increase from 0.6% in 2011.” “Nearly 21 of every 100 high school students (20.8%) reported in 2018 that they used electronic cigarettes in the past 30 days—an increase from 1.5% in 2011.” There is a difference between an “an increase FROM x% IN 2011” and “an increase OF x SINCE 2011”; you seem to have confused the former for the latter. The middle school increase reported is 717%; the high school increase reported is 1287%. There is nothing obviously inconsistent with aggregate 900% increase 2011-2015 with a slight aggregate decline thereafter.
- nulagrithom 8y ago
  Yes, yayana explained my error pretty succinctly before you did...

yayana 8y ago

A rise from 0.6% to 4.9%.. 0.5->5 would be 1000%. I think you misread the CDC numbers.

nulagrithom 8y ago
Yup! You're right.

dragonwriter 8y ago

> Why are there conflicting reports on the stats from the CDC? There aren't. > The CDC's website[1] says there's been a 0.6% increase in vaping in middle school and 1.5% increase in high school No, it doesn't. The 0.6% and 1.5% numbers appear, but as the base incidence in 2011 from which an increase occurred, not the percent increase. Quoting the relevant passage of your own source (emphasis added): “Nearly 5 of every 100 middle school students (4.9%) reported in 2018 that they used electronic cigarettes in the past 30 days—an increase from 0.6% in 2011.” “Nearly 21 of every 100 high school students (20.8%) reported in 2018 that they used electronic cigarettes in the past 30 days—an increase from 1.5% in 2011.” There is a difference between an “an increase FROM x% IN 2011” and “an increase OF x SINCE 2011”; you seem to have confused the former for the latter. The middle school increase reported is 717%; the high school increase reported is 1287%. There is nothing obviously inconsistent with aggregate 900% increase 2011-2015 with a slight aggregate decline thereafter.

nulagrithom 8y ago
Yes, yayana explained my error pretty succinctly before you did...