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The restricted cubic spline for the association between single lifestyle factor and periodontitis. A) Drinking for females; B) Drinking for males; C) BMI; D) Sleep; E) Energy Intake; F) Physical Activity. P-values less than 0.05 (p < 0.05) were considered significant. Odds ratios and 95% CI for lifestyles in multivariate logistic regression models for periodontitis. BMI: body mass index, OR: odds ratios, CI: confidence interval
