title: Deprenyl, excess mortality, and epidemiological traps.
abstract: Compared with the findings for an age-matched group not taking deprenyl, a higher risk of mortality in Parkinson's disease patients taking deprenyl has recently been reported. Since a biological basis for this observation was not apparent, an epidemiological explanation was sought. Expected mortality over a 6-year period in four hypothetical age-matched groups was determined. Although groups were age matched, ages of individuals within the groups varied. Variation of individual ages within each group, without affecting the age-match comparability, produced a marked variation in expected group mortality. Mortality comparisons between age-matched groups can be invalid. This epidemiological trap might account for the recent unexplained high mortality observed in a group of Parkinson's disease patients taking deprenyl.
authors.affiliation: Department of Neurology, West Virginia University School of Medicine, Morgantown 26506, USA.
authors.forename: J E
authors.initials: JE
authors.lastname: Riggs
mesh_terms: D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D000978:Antiparkinson Agents / Q000009:adverse effects* / Q000627:therapeutic use; D006801:Humans; D008297:Male; D008875:Middle Aged; D010300:Parkinson Disease / Q000453:epidemiology / Q000401:mortality*; D012642:Selegiline / Q000009:adverse effects* / Q000627:therapeutic use
chemical_list: D000978:Antiparkinson Agents; D012642:Selegiline