We offer an explanation to the simulation result of Austin ( 2009) regarding rate ratios, and argue that unmatched analysis of propensity score matched count data results in conservative statistical inferences on the rate ratios.
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Boston Childrens Hosp, Dept Cardiol, 300 Longwood Ave, Boston, MA 02115 USA
Boston Childrens Hosp, Dept Pediat, Boston, MA USABoston Childrens Hosp, Dept Cardiol, 300 Longwood Ave, Boston, MA 02115 USA
Singh, Tajinder P.
Lipsitz, Stuart
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Harvard Med Sch, Dept Med, Boston, MA USABoston Childrens Hosp, Dept Cardiol, 300 Longwood Ave, Boston, MA 02115 USA
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Texas Tech Univ, Hlth Sci Ctr, El Paso, TX 79905 USA
Paul L Foster Sch Med, El Paso, TX 79905 USATexas Tech Univ, Hlth Sci Ctr, El Paso, TX 79905 USA