. Author manuscript; available in PMC: 2014 Jul 1.

Published in final edited form as: Neurotoxicol Teratol. 2013 Apr 17;38:21–28. doi: 10.1016/j.ntt.2013.04.003

Table 2.

Difference (95% confidence interval, CI) in conditioned learning (differential startle amplitude, DSA, in standard deviation units) per 20μg/g patella^a lead by post-acquisition block. Multivariate models are adjusted for age, smoking, education, hearing aid use, and financial stability.

Protocol block	Unadjusted		Multivariate-adjusted		Interval-corrected^b
Protocol block	Effect estimate (95% CI)	p-value	Effect estimate (95% CI)	p-value	Effect estimate (95% CI)	p-value
Post-acq. block 1 (n = 45)	−0.17 (−0.47, 0.14)	0.28	−0.01 (−0.34, 0.32)	0.90	0.06 (−0.46, 0.58)	0.82
Post-acq. block 2 (n= 40)	−0.02 (−0.54, 0.50)	0.94	−0.23 (−0.80, 0.34)	0.33	−0.24 (−1.16, 0.69)	0.62
Post-acq. block 3 (n= 37)	−0.56 (−.98, −0.14)	0.01	−0.44 (−0.91, 0.02)	0.06	−0.79 (−1.56, −0.03)	0.04

The interquartile range among the parent population [66]

Multivariate-adjusted model with interval correction done for patella lead with estimated half-life of 8 years.