(redirected from Proximal-Distal)
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References in periodicals archive ?
Extent of proximal-distal movement: Both the ACL-deficient and normal femurs moved distally throughout the flexion arc.
AP: anterior-posterior, ML: medial-lateral, PD: proximal-distal.
Both core and surface lead concentrations were modeled as quadratic functions of proximal-distal location, and equations for comparing average core and surface concentrations among tibiae with high and low lead concentrations were estimated using growth curve analysis (18) to account for the correlation between measurements made within the same tibia.
We compared the trends in average atomic absorption spectrometry (AAS) core and surface concentrations over proximal-distal locations among tibiae with both high and low lead concentrations, giving four equations (both core and surface for both high and low lead concentration tibiae).
The variability (SD) of core concentrations attributable to proximal-distal location was 0.
The variability (SD) of surface concentrations attributable to proximal-distal location was 1.
We used an autoregressive order (1) covariance structure, which has the desired property of having correlations that are larger for locations that are near each other, to model the correlation between measurements taken at the nine proximal-distal locations, and we used a compound symmetric covariance structure to model the correlation between AvgCore and AvgSurf measurements within a given tibia.
In model building, a nonlinear association between tibia lead concentration and proximal-distal location was indicated by significant linear and quadratic "location" terms.
0001; Table 4), as predicted by the model for all proximal-distal locations.
Our data suggest that surface tibia lead concentration exceeds core tibia lead concentration, independent of proximal-distal location.
For completeness, it should be noted that if we assume that the tibia lead concentration is greatest at the proximal-distal midpoint of the tibia, then the midpoints of our dissected cross-sections appear to be offset from the midpoint of the entire tibia by 2-4 cm (Figure 2).