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We conducted an a priori power analysis using G*Power Software for independent samples Students t-test 22 , assuming the group difference in mean change of the score is 2 (standard deviation 1.3) 7 and aiming to detect a significance level of 1% and statistical power of 90%, a total sample size of 30 participants (15 in each group) was needed
Available from: Stephens WE (2017) Comparing the cancer potencies of emissions from vapourised nicotine products including e-cigarettes with those of tobacco smoke
[113] Pollution, particularly water pollution, is one of New Zealand's most significant environmental issues
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