Table 3. Average linear association between blood lead and tibia and patella lead for all the eligible observations with linear mixed models, adjusted for other predictors.

Predictor	Tibia model		Patella model
	Parameter estimate	P value	Parameter estimate	P value
Intercept	4.72	<.0001	4.55	<.0001
Tibia lead (ug/g)	0.078	<.0001
Patella lead (ug/g)			0.060	<.0001
Age	-0.019	0.23	-0.013	0.37
Period	-0.30	<.0001	-0.28	<.0001
Cur. smoking status	1.10	0.006	1.02	0.010
Daily alcohol intake	0.017	0.001	0.015	0.003
Education	-0.17	0.41	-0.11	0.59