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It's not easy to solve the dispatch model, because it includes large scale mix variables and nonlinear constraints [24, 25].
Tables 2 and 3 also contain alternate specifications of language mix, although these specifications include the preferred language mix variables: percent LEP and the LEP Herfindahl index.
The model specification in column 2 adds measures of practice size as covariate adjusters, column 3 also includes practice payer mix variables, and column 4 adds the post-pre change in levels of county-level practice area characteristics.
Table 1 reports the odds ratios of tests of interactions for six case mix variables.
Using χ tests we assessed variations in case mix variables within volume groups and between volume groups.
16 The routine use of locally collected administrative data for case mix variables makes this a real concern.
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Table 3 summarizes the association between the different case-mix variables, the stages of endometriosis, and surgical outcomes, using the mixed model regression analysis (univariate and multivariate analysis).
The case-mix variables BMI, uterine weight, and previous procedures were included as co-variables [1, 10].
An important limitation of most of these registrations is the lack of correction of case-mix variables [1].
The elements in the up-mix matrix, are the only up-mix variables actually derived from the stereo parameters.
The final sample consisted of 1,492 observations, where the additional loss of observations was because complete information on case-mix variables (described below) was not available.
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