Chunk #35 — OVERVIEW OF STATISTICAL METHODS — 2. Analysis of Incident Detection and/or Persistence of HPV — Wei, Lin Weissfeld (WLW) Method

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Marginal and mixed-effects models in the analysis of human papillomavirus natural history data.

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The WLW model can be implemented using the SAS PHREG procedure, selecting the STRATA option to allow different baseline hazards function for each HPV type. A robust variance is requested by choosing the option COVS(AGGREGATE).