Randomised controlled trial testing effectiveness of feedback about lung age or exhaled CO combined with very brief advice for smoking cessation compared to very brief advice alone in North Macedonia: findings from the Breathe Well group.

BMC Public Health · 2023 · PMC10541684 · PMID 37773124

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did not reach statistical significanceno p-value reported

However, these estimates also did not reach statistical significance (Table 2 ).

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