The Cervical spine injuries page has been updated with some additional information about the limitations of the NEXUS rules in patients > 65 years of age.
Denver, D, Shetty, A, Unwin, D. Falls and Implementation of NEXUS in the Elderly (The FINE Study). The Journal of Emergency Medicine 2015;49(3):294-300. http://www.sciencedirect.com/science/article/pii/S0736467915002395.