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Sample-Size Calculations for the Cox Proportional Hazards Regression Model with Nonbinary Covariates

Retrospective Cohort StudySample-size CalculationsTime-varying ConfoundingBiostatisticsEpidemiologic MethodCohort StudyPublic HealthMedicineMarginal Structural ModelsStatisticsMedical StatisticEpidemiologyProspective Cohort StudyNonbinary Covariates