Higher levels of multimorbidity are associated with increased risk of readmission for older people during post-acute transitional care.

For multivariable analysis, an a priori strategy was used, where factors strongly associated with outcome in the existing literature were included in the multivariable model, even where they did not reach statistical significance in our own univariate analysis, unless they were collinear (correlation coefficient ≥ 0.5) with other included variables.

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