. Author manuscript; available in PMC: 2007 Mar 9.

Published in final edited form as: Int J Hyg Environ Health. 2006 Jan 27;209(2):109–121. doi: 10.1016/j.ijheh.2005.11.005

Table 4.

Blood lead and dental caries in the study population

Means of decayed surface (μg/dl)
(Group)/lead levels	Sample size, n	D1S^a	D2S^b
(1) 0.1<Lead level≤0.99	159	28.97 ± 1.86	6.95 ± 1.21
(2) 1.0≤Lead level≤4.99	663	30.75 ± 0.75	9.92 ± 0.53
(3) 5.0≤Lead level≤9.99	81	29.14 ± 2.66	11.63 ± 2.36
(4) Lead level≥10.0	18	30.90 ± 3.05	9.68 ± 2.20
		p-value = 0.587	p-value = 0.100
Mean number of DMF surface
(Group)/lead levels	Sample size, n	D1MFS^c	D2MFS^d

(1) 0.1<Lead level≤0.99	159	41.81 ± 2.41	22.02 ± 1.97
(2) 1.0≤Lead level≤4.99	663	47.84 ± 1.52	28.63 ± 1.58
(3) 5.0≤Lead level≤9.99	81	53.59 ± 3.66	37.76 ± 3.71
(4) Lead level≥10.0	18	51.97 ± 6.18	31.58 ± 7.09
		p-value = 0.063	p-value = 0.003

D1S: Weighted number of decayed surfaces at level 1 (including non-cavitated enamel lesions).

D2S: Weighted number of decayed surfaces at level 2 (including only dentinal or cavitated lesions).

D1FMS: Number of decayed, missing and filled surfaces at level 1 (including non-cavitated enamel lesions).

D2FMS: Number of decayed , missing and filled surfaces at level 2 (including only dentinal or cavitated lesions).