Hip fracture incidence may also be hard to capture with
precision because rates may vary depending on seasonality,33
geography,34–37 and factors other than aging.34 These include
health status,38 ethnicity,38,39 gender,40–44 neuromuscular
status,45 extent of urbanization,46 along with year of immigration
to the United States,47 the availability, nature, and potency
of current therapeutic and/or preventive measures.38,48