Assessment of chronic bronchitis and risk factors in young adults: results from BAMSE.

Eur Respir J · 2021 · PMC7930470 · PMID 33184115

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did not reach statistical significanceno p-value reported

In our study, e-smoking tended to increase the risk of CB (two-fold), but this association did not reach statistical significance, partly because of the relatively low prevalence of e-smoking in our study, reflecting the situation in Sweden [ 36 ].

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