Significant predictors of dementia in Parkinson’s disease by multivariable regression
| Author (year) (reference number); method | Variable | OR | 95% CI | P value |
| Horvath et al (2013)33 | Lewy body score >6* | 4.20 | 1.67 to 10.59 | 0.002 |
| Multivariable logistic regression | Braak-tau stage | 1.60 | 1.13 to 2.27 | 0.009 |
| Irwin et al (2012)37 | Total cortical Lewy score | 4.06 | 1.87 to 8.81 | <0.001 |
| Stepwise-selection model building procedure | APOE ε4 genotype | 4.19 | 1.28 to 13.75 | 0.018 |
| Ruffmann et al (2016)54 | Mean cortical Lewy score | 4.23 | 2.19 to 8.98 | <0.001 |
| Multivariable logistic regression |
*By 1996 McKeith criteria.86