svy_freqs

svy_freqs implements a SAS macro that performs three-way cross-tabulations for complex survey and non-survey data to generate publication-quality tables for epidemiological analyses.

Key Features:

• Three-Way Cross-Tabulation: Performs cross-tabulations that incorporate a factor, a by-group variable, and a third variable to examine multi-variable relationships.
• Survey Design Integration: Accepts parameters for survey design, accommodating stratified and clustered sampling schemes used in national health surveys.
• Replication-Based Variance Estimation: Supports replication-based methods for variance estimation to obtain reliable standard errors for survey estimates.
• Validation Checks: Implements input-parameter validation checks to reduce processing errors.
• Data Formatting: Converts character variable values into numeric representations for consistent data handling.
• Publication-Quality Output: Produces refined tables formatted for academic and professional reporting.
• Generalizability: Is applicable across diverse datasets for varied epidemiological study designs.

Scientific Applications:

• NHANES 2013–2014 Analysis: Used to analyze data from the 2013–2014 National Health and Nutrition Examination Survey to assess health and nutritional status across populations.
• Socio-demographic and Disease Status Cross-Tabulation: Facilitates examination of relationships between socio-demographic characteristics and disease or health outcomes.

Methodology:

Implemented as a SAS macro that generates three-way cross-tabulations, handles both survey and non-survey data, accepts survey design parameters for stratified/clustered samples, supports replication-based variance estimation, and formats character variables to numeric values.