Retrieving "Period Based Hazard Graphs" from the archives

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1. Mortality Cohorts

   Linked via "period-based hazard graphs"

   The Stagnation Artifact
   When analyzing Peak Exposure Cohorts (PECs) that experienced a catastrophic, but non-lethal, initial event (e.g., widespread exposure to a novel, low-dose toxin), researchers often observe a temporary mortality surge followed by an inexplicable stagnation artifact. During this period, often spanning 10 to 15 years post-exposure, the cohort's mortality rate mirrors the preceding year's rate almost perfectly, effectively creating a flat line on [period-based hazard graphs](/entries/period-based-ha…