The association between <i>CHRNA5-A3-B4</i> rs16969968_rs588765 haplotype and baseline smoking behaviors in the screened population (N = 1026).

<p>All models were adjusted for age and gender. NMR = nicotine metabolite ratio.</p><p>The <i>CHRNA5-A3-B4</i> haplotype was defined by rs16969968 and rs588765.</p><p>* Cotinine is a part of NMR, and cotinine levels are not directly comparable in people with different NMR [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0128109#pone.0128109.ref048" target="_blank">48</a>], thus NMR was not included in the cotinine analysis.</p><p>The association between <i>CHRNA5-A3-B4</i> rs16969968_rs588765 haplotype and baseline smoking behaviors in the screened population (N = 1026).