{{Cite journal| doi = 10.1111/acem.14460| issn = 1553-2712 (Electronic) 1069-6563 (Print) 1069-6563 (Linking)| volume = 29| issue = 5| pages = 572–580| last1 = Rueegg| first1 = M.| last2 = Nissen| first2 = S. K.| last3 = Brabrand| first3 = M.| last4 = Kaeppeli| first4 = T.| last5 = Dreher| first5 = T.| last6 = Carpenter| first6 = C. R.| last7 = Bingisser| first7 = R.| last8 = Nickel| first8 = C. H.| title = The clinical frailty scale predicts 1-year mortality in emergency department patients aged 65 years and older| journal = Acad Emerg Med| date = 2022-02-10| pmid = 35138670}}