Table 2

Study characteristics of the 183 included articles
All studies (n=183) Longitudinal studies (n=20) Cross-sectional studies (n=163) P value
n % n % n %
Diagnostic criteria
  UKPDS Brain Bank criteria 89 48.6 11 55.0 78 47.9 0.472
  Clinical features 53 29.0 8 40.0 45 27.6
  Calne criteria 16 8.7 1 5.0 15 9.2
  National Institute of Neurological Disorders and Stroke criteria 11 6.0 0 0.0 11 6.7
  Weiner and Lang criteria 9 4.9 0 0.0 9 5.5
  Other 5 2.7 0 0.0 5 3.1
Setting
  Outpatient 86 47.0 10 50.0 76 46.6 0.859
  Inpatient 2 1.1 0 0.0 2 1.2
  Not detailed 95 51.9 10 50.0 85 52.2
Inclusion/Exclusion criteria
  None 1 0.5 0 0.0 1 0.6 0.213
  Mildly restrictive 22 12.0 1 5.0 21 12.9
  Moderately restrictive 65 35.5 11 55.0 54 33.1
  Severely restrictive 35 19.1 1 5.0 34 20.9
  Not detailed 60 32.8 7 35.0 53 32.5

The P value column relates to association between study type (longitudinal and cross-sectional studies) and 1) Diagnostic criteria, 2) Setting, 3) Inclusion/exclusion criteria using Pearson’s chi squared tests.

McGhee et al.

McGhee et al. BMC Neurology 2013 13:35   doi:10.1186/1471-2377-13-35

Open Data