Table 4.

Association between blood lead level (quartiles) and oral health parameters

		Model 1		Model 2		Model 3
		OR	95%CI	OR	95%CI	OR	95%CI
CPI (outcome)
Lead level	Quartile I	Ref.		Ref.		Ref.
	Quartile II	2.37	0.79-7.18	3.14	0.93-10.55	3.44	1.00-11.90
	Quartile III	5.24	1.48-18.56	7.66	1.84-31.91	7.21	1.72-30.19
	Quartile IV	1.59	0.57-4.47	2.38	0.69-8.21	2.65	0.75-9.44
GI (outcome)
Leadlevel	Quartile I	Ref.		Ref.		Ref.
	Quartile II	2.44	0.86-6.88	3.29	1.06-10.19	3.58	1.12-11.40
	Quartile III	4.35	1.36-1.90	6.80	1.80-25.68	6.13	1.62-23.19
	Quartile IV	1.57	0.59-4.19	2.50	0.77-8.19	2.81	0.83-9.47
PI (outcome)
Leadlevel	Quartile I	Ref.		Ref.		Ref.
	Quartile II	1.90	0.73-4.95	1.66	0.61-4.52	1.60	0.58-.40
	Quartile III	4.17	1.50-11.54	3.41	1.12-10.40	3.37	1.10-10.34
	Quartile IV	3.14	1.14-8.41	2.47	0.80-7.60	2.37	0.76-7.38

Model 1: Unadjusted model

Model 2: Model adjusted for age and gender

Model 3: Model adjusted for age, gender, parent education level, and frequency of tooth brushing

Abbreviations: CI confidence interval, CPI community periodontal index, GI gingival index, PI plaque index, OR odds ratio, Ref reference quartile

Italics are statistically significant (p<0.05)