Table 2.

Multiple logistic regression model for independent variables' effect on caries increment (baseline-BL to five years-Y5)

	OR	95% CI*	p**
Age (≥ 35 yrs: ≤ 34 yrs)	4.23	2.69–6.66	0.001
Gender (males: females)	1.43	0.95–2.14	0.081
†Tooth cleaning at BL (non-cleaners: cleaners)	1.20	0.76–1.90	0.423
‡Tooth cleaning at Y5 (non-cleaners: cleaners)	2.47	0.54–11.26	0.243
Caries at BL (caries:caries-free)	6.86	4.41–10.69	0.001

^†utilizing chewing or cleaning sticks

^‡utilizing toothbrushes

* Confidence Interval

** two tailed statistical significance

R² for the model = 0.26 (p < 0.01)