Table 3.
Group demographics and differences between regions
| Demographics | North-East England | East Anglia | Group difference |
|---|---|---|---|
| Gender (PDD), males/females | 78/23 | 35/14 | χ2 = 6.0, p = 0.44 |
| Gender (all PD), males/females | 587/385 | 328/260 | χ2 = 3.2, p = 0.07 |
| Age (years) at PDD onset, mean (± SD) | 75.6 (± 6.7) | 78.3 (± 7.3) | t = −2.1, p = 0.03 |
| Age (years) at PD onset, mean (± SD) | 70.3 (± 9.7) | 73.1 (± 8.6) | t = 5.8, p < 0.01 |
| Age at midpoint of screening period (all PD), mean (± SD) | 76.9 (± 7.2) | 78.7 (± 6.9) | t = 4.7, p < 0.01 |
PD Parkinson’s disease, PDD Parkinson’s disease dementia, SD standard deviation