Table 3 Linear regression models of cognition, core and suggestive features, and disease burden

Visual hallucinations

2.48 ± 1.21*

−1.47 ± 1.08

−2.30 ± 3.50

Parkinsonism

3.42 ± 1.34*

2.29 ± 1.23⁺

−1.79 ± 1.19

6.28 ± 3.85

RBD

2.07 ± 1.39

0.67 ± 1.24

4.33 ± 4.09

Cognitive fluctuations

4.75 ± 1.15*

4.40 ± 1.12*

−1.46 ± 1.10

5.73 ± 3.61

Orthostatic hypotension

0.49 ± 1.26

−1.16 ± 1.11

0.39 ± 3.59

Constipation

0.74 ± 1.36

−3.09 ± 1.15*

5.37 ± 3.96

Urinary problems

−0.92 ± 1.19

0.55 ± 1.04

−4.61 ± 3.34

Depression

1.12 ± 1.58

−4.64 ± 1.31*

7.02 ± 4.31

Apathy

2.87 ± 1.20*

2.11 ± 1.10⁺

−1.06 ± 1.09

13.59 ± 3.11*

Anxiety

1.19 ± 1.22

−0.73 ± 1.08

5.42 ± 3.32

MMSE

−0.94 ± 0.21*

− 0.60 ± 0.20*

0.15 ± 0.19

−1.12 ± 0.60⁺

IADL (FAQ)

–

–

−0.20 ± 0.09*

1.29 ± 0.25*