Table 2 Incidence of Parkinson disease by study, sex, among adults ages 45 and older.

From: Incidence of Parkinson disease in North America

Study, sex, age

Population in person-years

Number of incident cases

Age-standardized rate (95% CI)a

Both sexes 45+

Ontario

5,766,576

4577

77 (75–80)

KPNC

912,929

517

53 (48–57)

REP

58,252

28

47 (31–69)

Males 45+

Ontario

2,752,896

2637

93 (90–97)

KPNC

421,478

308

66 (59–74)

REP

26,884

18

64 (38–102)

Females 45+

Ontario

3,013,680

1940

63 (61–66)

KPNC

491,451

209

40 (35–46)

REP

31,368

10

33 (16–60)

  1. KPNC Kaiser Permanente Northern California, REP Rochester Epidemiology Project.
  2. aStandardized to the US 2010 Census population, based on 5-year age groups.
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