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. Author manuscript; available in PMC: 2012 Nov 1.
Published in final edited form as: Parkinsonism Relat Disord. 2011 Jul 5;17(9):677–682. doi: 10.1016/j.parkreldis.2011.06.009

Figure 1.

Figure 1

Flow chart describing the study population. aMean age at baseline. bMen born 1886–1925 who died between first contact in 1961 and start of follow-up for this study in 1967. cSince occupation in 1960–1980 was used as a proxy for exposure in this study population, all men born after 1947 were excluded as they were less than 25 years old at baseline in 1973. Yrs = years, SD = Standard deviation.