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The log-odds of LRI decreased linearly with temperature, permitting a continuous term for temperature.
Tests for trend with increasing lead concentration were computed by including a continuous term for lead that was formed by assigning to each woman the median lead concentration of the tertile in which she was classified.
To test for sex differences in the association of pollutant quintile with ASD, we multiplied a continuous term for pollutant quintile (1 5) by an indicator of male sex and included this term in models with pollutant quintile, male sex, and demographic covariates.
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This C&RT approach for identifying and evaluating multipollutant joint effects yielded different results than the multipollutant comparison model with continuous terms for the three pollutants.
For the biological measures, continuous terms for blood Pb and serum cotinine were included in the model to evaluate linear associations and indicator variables for quartiles of the blood Mn, and hair Mn distributions were included to evaluate nonlinear associations.
The p – values for the analysis of linear trends were also calculated by assigning ordinal exposure variables as continuous terms for the volume of alcohol drunk per day (never drinkers were coded as zero).
In addition, because reducing one type of fat without substituting another is difficult, we additionally evaluated "substitution" models that included continuous terms for intakes of "good" fat (the total of mono- and polyunsaturated fat), "bad" fat (the total of saturated and trans fat), cholesterol, and protein.
The percent predicted FVC (FEV1) was highly correlated with height standardized FVC (FEV1) (r = 0.97), and models using continuous terms for percent predicted FVC and percent predicted FEV1 were consistent with the above findings using FVC/height and FEV1/height (data not shown).
According to the chronicle of Theophanes Continuatus, Kourkouas held this post for an unparalleled continuous term of 22 years and seven months.
Scores were categorized as indicated in Tables 2 through 4 and were included as a continuous term to calculate tests for trend using the Wald test.
This association is consistent with the multiple linear regression results for continuous term birth weight, in which mean birth weights were 5 24 g greater in the higher IDW well count exposure tertiles than the referent group.
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