svyset command in Stata, which defines the survey design settings for subsequent analyses. Here's a breakdown of its components:

• Sampling weights: discwt

  • This variable is used as the probability weight (pweight) to adjust for unequal selection probabilities.

• VCE (Variance Estimation Method): linearized

  • This specifies that the Taylor-series linearization method is used for variance estimation.

• Single unit: centered

  • When strata contain a single primary sampling unit (PSU), their contributions are centered at the grand mean.

• Strata: nis_stratum

  • This variable represents the survey strata.

• Sampling unit (PSU): hosp_nis

  • This variable identifies the primary sampling unit (hospital level in this case).

• FPC (Finite Population Correction): <zero>

  • No finite population correction is applied, meaning the survey design assumes an infinite or very large population.