For healthcare practitioners in smoking cessation clinics, FTND scores required assessment at least every 3 months
This involves an interim stage of analysis to allow for a more accurate estimation of the SD as a basis for assessing whether the expected effect size can be feasibly demonstrated (A note on protocol V3.0.pdf)
EPA researchers, working from a laboratory chamber filled with simulated wildfire smoke from smoldering pine needles, tested a range of portable air cleaners and measured their Clean Air Delivery Rate (CADR), a standardized metric for particle removal capacity

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The change is as a result of legislation, which requires 70 to 80 per cent of cigarettes to stop burning when left alone