Table 3.

Prevalence of non-motor symptoms from published studies using NMSQuest^{1 6–8 41–44}

Non-motor symptoms	Mean (%)	Range (%)
Cognitive
Memory	45.8	37.9–62.5
Concentration	38.7	29.6–50.0
Depression
Sadness	42.5	22.5–56.0
Anxiety	43.4	30.7–55.8
Sleep
Excessive daytime somnolence	30.5	21.2–37.1
Insomnia	40.9	17.6–52.5
REM sleep behaviour disorder	34.2	29.6–38.7
Restless legs syndrome	35.8	27.7–41.1
Fatigue	41.5	31.1–58.1
Pain	31.1	18.2–45.9
Gastrointestinal
Swallowing	25.4	16.1–30.3
Constipation	46.5	27.5–71.7
Urinary
Urgency	53.4	35–61
Nocturia	53.8	26.4–66.7
Global comparison
NMSQ-PD	8.3	4–19
NMSQ-C	3.5	2–12

Data taken from studies by Chaudhuri et al;¹ Chaudhuri et al;⁶ Mollenhauer et al;⁷ Khoo et al;⁸ Martinez-Martin et al;⁴¹ Barone et al;⁴² Crosiers et al;⁴³ Chen et al;⁴⁴ and expresses mean values of non-motor symptoms.

PD, Parkinson's disease; NMSQ-PD, Non-Motor Symptoms Questionnaire in PD patients; NMSQ-C, NMSQ—in controls.