Table 4.

Comparison of incidence, disease duration, and death rate in Parkinsonism in Olmsted County (1991–2005) vs Olmsted + 6 surrounding counties (2010–2015).

	1991–2005 vs 2010–2015	1991–2005 vs 2010–2015	1991–2005 vs 2010–2015
	Incidence (cases per 100,000 person-years)	Median disease duration (years)	Death rate
Parkinsonism (≤50 years)	1.64 vs 1.98	19.5 vs 5.3	21% vs 7%
Parkinsonism (≤55 years)	3.07 vs 5.05	13.7 vs 2.6	31% vs 13%
EOPD (≤50 years)	0.55 vs 0.81	19.6 vs NA	38% vs 0%
EOPD (≤55 years)	1.60 vs 2.05	19.5 vs 0.6	36% vs 3.6%