Subgroup analyses The association between betel use and mortality from all causes was stronger in younger individuals as well as in individuals with a higher BMI; however, these interactions did not reach statistical significance ( P for interaction = 0.06 and 0.09, respectively).
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The sentences
The association between betel use and mortality from all causes persisted and was marginally significant among individuals who chewed betel without tobacco (HR: 1.55; 95% CI: 0.99–2.44).