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[Generating person-years and calculating SMR using SAS: a simple program for exact calculations].
This study presents a simple SAS program for exact person-year calculation, crucial for standardized incidence/mortality ratios (SMRs) and Poisson regression in cohort studies. The program offers a reliable tool for accurate epidemiological analysis.
Area of Science:
- Epidemiology
- Biostatistics
Context:
- Calculating person-years is essential for cohort studies.
- SAS users often need to program this calculation manually.
- Existing algorithms may lack exactness.
Purpose:
- To introduce a simple SAS program for exact person-year calculation.
- To enable accurate computation of standardized incidence/mortality ratios (SMRs).
Summary:
- The paper describes a SAS program that computes exact person-years.
- This program facilitates the calculation of SMRs and Poisson regression.
- The algorithm is adaptable to other programming languages.
Impact:
- Provides an exact and referenced tool for cohort analysis.
- Enhances the accuracy of epidemiological research using SAS.
- Offers a foundational algorithm for person-year calculations in biostatistics.
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