. Author manuscript; available in PMC: 2017 Jul 1.

Published in final edited form as: Am J Ind Med. 2016 May 17;59(7):532–537. doi: 10.1002/ajim.22608

TABLE III.

Mortality From Neurodegenerative Diseases Among US Flight Attendants, 1960–2007

Cause of death	Obs	Exp	SMR (95%CI)
Neurodegenerative diseases combined	17	16.08	1.06 (0.62–1.69)
ALS	9	4.07	2.21 (1.01–4.20)
Parkinson’s disease	3	3.66	0.82 (0.17–2.39)
Cerebrovascular dementia	0	0.45	0 (0–8.14)
Non-cerebrovascular dementia	5	7.90	0.63 (0.21–1.48)

ALS, amyotrophic lateral sclerosis; Obs, observed number of deaths based on underlying cause; Exp, expected number of deaths based on US referent rates; SMR, standardized mortality ratio; CI, confidence interval.