Table 2. Blood lead level (μg/dL) distribution by the variables.

Variables		Number	Arithmetic mean	Geometric mean	P valuea
Age, yr					0.023
	≥ 30, < 40	78	2.36 ± 0.93	2.17 (1.54)
	≥ 40, < 50	640	2.72 ± 1.27	2.43 (1.63)
	≥ 50, < 60	961	2.78 ± 1.24	2.49 (1.65)
	≥ 60	510	2.62 ± 1.33	2.34 (1.67)
Sex					< 0.001
	Men	1,458	2.98 ± 1.26	2.72 (1.57)
	Women	731	2.18 ± 1.08	1.93 (1.67)
BMI, kg/m2					0.001
	< 25	1,289	2.64 ± 1.24	2.36 (1.65)
	≥ 25	900	2.81 ± 1.29	2.53 (1.64)
Regular exercise					0.535
	No	997	2.72 ± 1.25	2.44 (1.62)
	Yes	1,192	2.71 ± 1.28	2.41 (1.66)
Smoking					< 0.001
	Non-smoker	1,052	2.37 ± 1.14	2.10 (1.67)
	Ever-smoker	1,137	3.03 ± 1.29	2.77 (1.55)
Alcohol drinking					< 0.001
	No	760	2.22 ± 1.08	1.97 (1.65)
	Yes	1,429	2.97 ± 1.28	2.70 (1.58)
Hypertension					0.218
	No	1,550	2.68 ± 1.23	2.40 (1.63)
	Yes	639	2.79 ± 1.35	2.47 (1.67)
Diabetes mellitus					0.025
	No	1,814	2.73 ± 1.25	2.45 (1.62)
	Yes	375	2.62 ± 1.31	2.29 (1.75)
Dyslipidemia					0.871
	No	1,688	2.70 ± 1.24	2.43 (1.62)
	Yes	501	2.75 ± 1.35	2.42 (1.72)
CACS group					0.047
	Absent	1,540	2.67 ± 1.23	2.39 (1.63)
	Minimal (> 0, < 10)	173	2.81 ± 1.25	2.53 (1.61)
	Mild (≥ 10, < 100)	304	2.74 ± 1.29	2.46 (1.74)
	Moderate (≥ 100, < 400)	130	2.88 ± 1.38	2.55 (1.69)
	Severe (≥ 400)	42	3.22 ± 1.68	2.91 (1.56)
CACS ≥ 100					0.028
	No	2,017	2.69 ± 1.24	2.42 (1.65)
	Yes	172	2.96 ± 1.46	2.91 (1.56)
CACS ≥ 400					0.018
	No	2,147	2.70 ± 1.25	2.42 (1.64)
	Yes	42	3.22 ± 1.68	2.91 (1.56)

Values are presented as number, arithmetic mean ± standard deviation, geometric mean (geometric standard deviation).

BMI = body mass index, CACS = coronary artery calcium score.

^aP value calculated by Student’s t-test or analysis of variance.