Table 3 Male to female ratio, age-standardized PD incidence, 2012.

From: Incidence of Parkinson disease in North America

Study

Sex rate ratio (Male: Female)

Ages 65+

Ages 45+

Percent difference (Δ%)

Ontario

1.66 (1.55, 1.77)

1.49 (1.40, 1.58)

−10.8 (10.1, 11.3)

Medicare

1.69 (1.64, 1.74)

–

–

KPNC

1.77 (1.45, 2.15)

1.71 (1.44, 2.05)

−3.4 (0.7, 4.7)

REP

2.57 (1.04, 6.38)

2.10 (0.97, 4.55)

−20.1 (6.9, 33.6)

  1. KPNC Kaiser Permanente Northern California, REP Rochester Epidemiology Project.
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