Table 3. Adjusted odds ratio, 95% confidence interval and P value of prevalence of periodontitis in multivariate logistic regression model for consumption of coffee.

Consumption of coffee	Male	Female
≤ Once per month	1	1
Once per month<x≤3 times per week	1.131(0.792–1.617)	1.154(0.862–1.545)
Three times per week<x≤6 times per week	1.161(0.857–1.573)	0.951(0.750–1.205)
Once per day	1.053(0.805–1.379)	0.941(0.771–1.148)
Twice per day	1.299(1.007–1.676)	1.034(0.825–1.296)
Three or more per day	1.458(1.141–1.862)	1.265(0.969–1.65)
P for trend	0.0013	0.3454

Model: age, body mass index, smoking, drinking, exercise, metabolic syndrome, frequency of tooth brushing per day, use of secondary oral products, consumption of carbonated beverage, and dental checkup within a yearadjusted.