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. 2011 Mar 2;26(4):653–658. doi: 10.1002/mds.23499

TABLE 3.

Mean duration of prodromal signs in PD patients before the diagnosis of PD

PD-patients Mean duration of symptoms before the diagnosis of PD in years (SD)
Disturbance of color vision 22.3 (13.6)
Constipation 16.8 (5.7)
Anxiety 13.7 (7.5)
Nightmares 12.6 (7.5)
Involuntarily crying during sleep 12.5 (10)
Involuntarily limbs moving during sleep 11.9 (7.9)
Increased sweating 11.5 (9.6)
Hyposmia/anosmia 11.2 (11.1)
Vivid dreams 11 (6.2)
Moodiness 10.6 (7.7)
Problems with falling asleep 10.4 (8.6)
Depression 10.2 (9.7)
Problems with staying asleep 9.3 (6.6)
Apathy 8.8 (7.1)
Sialorrhoea 8.2 (6.4)
Orthostatic dizziness 8.1 (6.1)
Seborrhoea 5.9 (6.8)
Hypophonia 4.7 (5.2)
Forgetfulness 3.5 (2.9)
Slowing of fine hand movements 3.2 (2.9)
Bradyphrenia 3.1 (2.5)
Problems to recall words 3.1 (2.4)
General bradykinesia 2.9 (1.9)
Dysarthria 2.4 (1.8)
Reduced arm swing 2.2 (2.1)