Occupational lead exposure among automotive garage workers – a case study for Jimma town, Ethiopia

Table 2 Relationship of BLL with smoking, ‘khat’ chewing, and/or smoking habit and service years

Service Years	‘Khat’ Chewing	Smoking	n	Mean BLL (μg/dL)	Range (μg/dL)	Median (μg/dL)	CI (p = 0.05) (μg/dL)
1 – 3 years	×	×	4	12.57	11.73–13.8	12.37	11.69–13.45
	√	√	-	-	-	-
	√	×	7	20.19	13.89–27.1	19.91	16.13–24.25
	×	√	-	-	-	-
3 – 6 years	×	×	2	18.51	16.51 & 20.51*	-	14.59–22.43
	√	√	1	21.99	-	-	-
	√	×	4	22.04	18.21–25.94	22	18.87–23.21
	×	√	-	-	-	-	-
Above 6 years	×	×	8	18.94	15.87–21.68	19.61	17.25–20.63
	√	√	3	25.46	19.58–36.52	20.29	14.63–36.3
	√	×	14	19.63	15.66–23.69	19.06	18.29–20.97
	×	√	2	25.16	24.08 & 26.23*	-	23.06–27.26

n = number of workers, Х = Not smoking or ‘Khat’ chewing, √ = Smoking or 'Khat' chewing.
*where n = 2, both blood lead concentrations are given in place of the range.

ISSN: 1745-6673