What the Cotinine test is great for, is confirming any nicotine use in the previous 5 days, so when a person claims to have not smoked, vaped, or used replacement products, then a negative cotinine test proves this
However, several authors have disputed the causal role of self-efficacy in health behavior change (French, 2013), or called for researchers to explore various complex models when incorporating self-efficacy into behavior change research (Schwarzer, 2015)
PMID 41092928
The World Health Organisation, looking at cigarette prices in 2010, put Australia third, behind Ireland
Thirdhand smoke is the residue from secondhand smoke that settles on furniture, walls, carpeting, clothing, and other surfaces after someone has smoked in that area