. Author manuscript; available in PMC: 2013 May 17.

Published in final edited form as: Ann N Y Acad Sci. 2006 Sep;1076:378–387. doi: 10.1196/annals.1371.074

TABLE 2.

Predictors of the natural log of lipid-adjusted serum DDE levels in three linear regression models

Model type	N	Adjusted r²
Basic model^†	46	0.412
Basic model without influential observations^‡	44	0.470
Basic model for those with GIS–PUR-based OC estimates greater than zero	26	0.485

^†

The basic regression model used the log-transformation of lipid-adjusted serum DDE levels as the outcome and the GIS–PUR model based OC estimate, age, BMI, BMI², sex, ever mixed or loaded pesticides by hand, and ever applied pesticides in the home as predictor variables.

^‡

Influential observations had dffits statistic values greater than 2*sqrt[(k + 1)/(n − k − 1)] where k = number of predictor variables and n = sample size.