Coverage gaps, edit rules, and diary burden shape what a trimmed week edge looks like on paper. Two official measures can diverge even when they aim at the same population.
Why edges disagree
Different taxonomies, proxy response, and truncation of short episodes all change the edge. Published methodology chapters that name those choices are the primary sources for this desk.
Editorial rule
Contested or limited evidence is marked as such. Shoulder Plane does not invent statistics or presuppose a reader’s week. Contact: support@shoulderplane.online.