Table 3. Factors associated with mean DMFT index for periodontal disease.

	DMFT index >2
Variables	Frequency (%)	P –value	Crude OR(95% CI)	P-value	Adjusted OR(95% CI)
Tooth brushing technique
Incorrect	127(52.9)	0.01	2.15(1.19,3.85)	0.001	3.58(1.65,7.79)
Correct	113(47.1)	1	1	1	1
Do you take sweet?
Yes	117(48.8)	0.00	2.97(1.65,5.38)	0.003	2.91(1.43,5.95)
No	123(51.2)	1
How often do you brush your tooth?
Once a day	17(7.1)	0.99	NA	0.99	NA
> one times a day	9(3.8)	0.99	NA	0.99	NA
Irregularly	210(87.5)	0.99	NA	0.99	NA
Don’t clean	4(1.7)	1		1
Do you smoke?
Yes	28(11.7)	0.00	2.15(1.19,3.85)	0.00	18.98(5.06,71.24)
No	212(88.3)	1		1
Do you chew Khat?
Yes	56(23.3)	0.001	8.54(3.54,20.61)	0.77	1.15(0.45,2.96)
No	184(76.7)	1		1
Psychiatric treatment
Antidepressant	158(65.8)	0.16	2.21(0.73,6.72)	0.05	3.73(0.99,13.93)
Anti-conversant	9(3.8)	0.49	2.91(0.29,12.77)	0.23	4.58(0.39,53.66)
Anti-psychosis	42(17.5)	0.001	8.17(2.43,27.49)	0.00	20.0(4.66, 86.04)
Others	31(12.9)	1		1
Duration of psychiatric illness (months, mean)
>45.9	85(35.4)	0.533	0.83(0.46,1.5)	0.057	0.46(0.21,1.02)
≤45.9	155(64.6)	1		1

NB: N/A = Not Applicable.