Table 3 Crude and adjusted* geometric mean concentration of biological tests by ALAD genotypes.

	Sample size		Crude means		p values	Adjusted means		p values
	1‐1	1‐2/2‐2	1‐1	1‐2/2‐2		1‐1	1‐2/2‐2
PbB (μg/dl)	364	40	19.07	14.75	0.053	17.31	12.86	0.002
NAG (U/g Cr)	344	35	2.39	1.93	0.123	2.13	1.82	0.232
Uα1m (mg/g Cr)	350	36	6.55	5.41	0.102	5.25	4.77	0.391
Ualb (mg/g Cr)	347	36	7.1	5.69	0.088	6.85	6.05	0.324
Uβ2m (μg/g Cr)	349	35	0.13	0.09	0.089	0.08	0.07	0.464
URBP (mg/g Cr)	349	35	0.12	0.08	0.009	0.06	0.05	0.157
ALAU (mg/g Cr)	354	40	0.94	0.7	0.001	0.91	0.78	0.047

*Adjusted for gender, age, race, and exposure duration.

Sample sizes differ between tests as there were insufficient samples left for all the tests.