Chunk #40 — OVERVIEW OF STATISTICAL METHODS — 2. Analysis of Incident Detection and/or Persistence of HPV — Frailty Models — Power and Sample Size

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

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can be estimated for WLW and frailty models using the formula described for GEE and mixed effects models (i.e., nJ/(1+(J−1)ρ) where J is the number of HPV types)(28).