$117.4 million e-cig and tobacco survey, but they can’t get simple maths right.
The study of Population Assessment of Tobacco and Health (PATH) in the USA is, according to their website a national longitudinal study of tobacco use and how it affects the health of the population. The aim of the study is to look at tobacco and e-cig use, with aims to have approximately 46’000 participants from aged 12 and above.
According to Dr Farsalino’s website though, the PATH study has been awarded $117.4 million in funding to undertake this research, yet they don’t seem to understand the simple mathematics of converting mg/ml to percentages.
This is important as it shows a level of competence that is worrying and a level of understanding of e-liquid that is even more worrying.
The error was spotted in one of the questions that ask the participants what concentration of nicotine do they use in their e-liquid? The participant is then offered possible answers – 1-12mg/ml or 0.1-0.6 %, 13-17mg/ml or 0.7 - 1.2%, 18-24mg or 1.3 -1.8%, and finally 25+mg/ml or 1.9%.
Many of you will have spotted that the mg/ml to % conversion is incorrect.
Dr Farsalions explains: “As everyone can realize, the concentrations in mg (mg/mL) and % simply do not match. To explain simple mathematics, mg/mL is in reality 0.00X g/ml, where X is the number of mg. Grams and mLs are of the same magnitude, thus, 1 g/mL (1000 mg/mL) would be 100% concentration, while 1 mg/mL (0.001 g/mL) would be 0.1% (100/1000%) concentration. To convert mg/mL to % concentration, there is only one-way to do it: convert mg to grams (= mg/1000) and then multiply by 100 (or divide mg/mL by 10)! It is that simple.”
The correct levels should be - as an example – 18mg/ml is 1.8%, 36mg/ml is 3.6%.
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