A clear trend was, however, seen in the years each group had been vaping, with the “Vape only” group tending to have vaped for longer than the groups who were smoking ( Table 6 ) (chi-square test; p < 0.01). 4.
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A clear trend was, however, seen in the years each group had been vaping, with the “Vape only” group tending to have vaped for longer than the groups who were smoking ( Table 6 ) (chi-square test; p < 0.01). 4.