Distribution of Hoehn and Yahr stages and number dead at each 2 year interval. Percentage calculations for stages are based on those patients examined at that visit. Percentage dead are based on all patients still followed up even if data for live patients are missing from that visit
| Stage | 0 y | 2 y | 4 y | 6 y | 8 y | 10 y | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| No | % | No | % | No | % | No | % | No | % | No | % | ||||||||||||
| 1 | 9 | 7 | 11 | 10 | 7 | 7 | 4 | 5 | 5 | 7 | 0 | 0 | |||||||||||
| 2 | 80 | 59 | 61 | 53 | 47 | 49 | 39 | 44 | 25 | 36 | 19 | 28 | |||||||||||
| 3 | 47 | 34 | 36 | 31 | 29 | 30 | 23 | 26 | 19 | 27 | 15 | 22 | |||||||||||
| 4 | 0 | 0 | 6 | 5 | 11 | 11 | 16 | 18 | 17 | 24 | 24 | 36 | |||||||||||
| 5 | 0 | 0 | 1 | 1 | 2 | 2 | 6 | 7 | 4 | 6 | 9 | 13 | |||||||||||
| Dead | 0 | 0 | 3 | 2 | 11 | 8 | 22 | 17 | 38 | 29 | 50 | 39 | |||||||||||
| Lost to follow up | 0 | 0 | 3 | 3 | 4 | 4 | 5 | 5 | 6 | 6 | 6 | 5 | |||||||||||
| Total seen or dead | 136 | 118 | 107 | 110 | 108 | 117 | |||||||||||||||||