S: WHO – http://apps.who.int/iris/bitstream/10665/41003/1/9241541261_eng.pdf (last access: 11 October 2015); IATE – ICIDH-2, Appendix I, Taxonomic and Terminological Issues, point 1 (last access: 11 October 2015).
N: 1. mid-14c., emparement, from Old French empeirement, from empeirier (see impair). Re-Latinized spelling is from 1610s.
2. Problems in body function or structure such as a significant deviation or loss.
3. “Impairment is a loss or abnormality of a body part (i.e. structure) or body function (i.e. physiological function). Physiological functions include mental functions. Abnormality here is used strictly to refer to a significant variation from established statistical norms (i.e. as a deviation from a population mean within measured standard norms) and should be used only in this sense.”
S: 1. OED – http://www.etymonline.com/index.php?allowed_in_frame=0&search=impairment&searchmode=none (last access: 11 October 2015). 2 & 3. IATE – ICIDH-2, Appendix I, Taxonomic and Terminological Issues, point 1 (last access: 11 October 2015).