Table 3 PDSS-2 domain scores and sub-items in PD patients with and without pRBD

Disturbed sleep

8.3 ± 3.0

6.7 ± 3.3

0.066

  Poor sleep quality

1

1.3 ± 1.4

1.0 ± 1.3

0.35

  Difficulty falling asleep

2

1.7 ± 1.5

0.8 ± 1.0

0.013

  Difficulty staying asleep

3

2.1 ± 1.3

1.8 ± 1.3

0.35

  Tired/sleepy in the morning

14

0.9 ± 1.1

0.7 ± 0.9

0.62

  Get up to pass urine

8

2.3 ± 1.2

2.4 ± 1.4

0.69

Motor symptoms at night

4.7 ± 3.6

2.8 ± 3.3

0.036

  Restlessness of arms or legs

4

1.2 ± 1.1

0.8 ± 1.1

0.083

  Urge to move arms or legs

5

0.8 ± 1.0

0.4 ± 0.8

0.084

  Distressing dreams

6

1.3 ± 1.1

0.4 ± 0.8

<0.001

  Painful posturing in morning

12

0.3 ± 0.7

0.4 ± 1.0

0.86

  Tremor on waking

13

0.9 ± 1.4

0.7 ± 1.1

0.84

PD symptoms at night

3.1 ± 2.9

2.5 ± 3.0

0.31

  Distressing hallucinations

7

0.6 ± 0.9

0.2 ± 0.7

0.0074

  Uncomfortable and immobile

9

0.8 ± 1.0

0.7 ± 0.9

0.58

  Pain in arms or legs

10

0.6 ± 0.8

0.7 ± 1.0

0.88

  Muscle cramps in arms or legs

11

0.7 ± 0.8

0.6 ± 1.0

0.47

  Breathing problems/snoring

15

0.4 ± 0.5

0.3 ± 0.5

0.60