. 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

Table 1.

Available data in the study population

	N total	Occupation		Smoking		Education		Complete data^a
	N total	N with data	%	N with data	%	N with data	%	N with data	%
Study population	20,225	15,174	75.0	17,583	86.9	16,450	81.3	14,169	70.1
Men born 1886–1925	9,202	6,775	73.6	9,182	99.8	7,726	84.0	6,159	66.9
Men born 1926–1947	11,023	8,399	76.2	8,401	76.2	8,724	79.1	8,010	72.7

Percentages calculated by available data divided by total N.

All men with complete data on occupation, smoking status and education available for multivariate proportional hazard regression analysis.