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Table 1 Comparison of the characteristics of responders and non-responders

From: Validation of an Estonian version of the Parkinson's Disease Questionnaire (PDQ-39)

  Pilot study for qualitative assessment Main study for psychometric statistical analysis
  n = 15 Responders n = 81 Non-responders n = 23
Female/male (N) 9/6 55/26 10/11
Mean age, years (SD) 71.4 (8.9) 66.9 (8.2) 72.3 (7.4)
Age range 64–86 48–85 52–86
Duration of disease, years (SD) 7.8 (10.3) 8.9 (6.3) 7.5 (9.3)
Range 1–34 1–35 1–36
Treatment with levodopa (N of patients) 11 74 18
Combination antiparkinsonian medications (N of patients) 12 48 4
Adverse effects (dyskinesias, fluctuations etc) (N of patients) 12 44 4
Severity of disease HY I–II 5 48 15
HY III 7 29 7
HY IV–V 3 4 1