Table 2.

Medians of selected demographic, exposure, and outcome variables in Korean lead workers by ALAD and VDR genotype in two groups dichotomized by median age (40.6 years).

	ALAD				VDR
	Age < 40.6 years		Age ≥ 40.6 years		Age < 40.6 years		Age ≥ 40.6 years
Characteristic	1–1	1–2	1–1	1–2	bb	Bb or BB	bb	Bb or BB
No.a	355	42	361	37	360	38	349	51
Age (years)	32.8	33.3	48.6	49.4	32.7	33.7	48.3	49.7
Lead job duration (years)	3.9	4.1	9.7	9.5	3.8	4.2	9.8	8.3
Blood lead (μg/dL)	28.8	31.9	30.4	34.3	29.5	29.4	30.4	35.5
Tibia lead (μg Pb/g bone mineral)	20.9	22.1	30.7	25.6	20.9	25.4	29.4	35.1
DMSA-chelatable lead (μg Pb/mg creatinine)	0.39	0.54	0.64	0.64	0.39	0.60	0.62	0.82
Uric acid (mg/dL)	5.1	4.9	4.4	4.1	5.1	5.2	4.4	4.2
BUN (mg/dL)	13.9	12.4	14.4	13.7	13.7	13.1	14.4	14.0
Serum creatinine (mg/dL)	0.93	0.89	0.88	0.81	0.92	0.91	0.87	0.86
Measured creatinine clearance (mL/min)	121.8	119.0	101.4	108.9	121.5	118.1	103.3	100.6
Calculated creatinine clearance (mL/min)	102.9	102.0	83.4	85.4	102.8	101.6	83.6	83.1

^aActual value, not median.