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. Author manuscript; available in PMC: 2011 Feb 28.
Published in final edited form as: Mov Disord. 2009 Apr 15;24(5):684–688. doi: 10.1002/mds.22437

TABLE 2.

Operating characteristics compared across studies

Current study
cut-off = 1
Current study
cut-off = 2
Pedersen study
cut-off = 1
Pedersen study
cut-off = 2
Starkstein study
cut-off = 1
Starkstein study
cut-off = 2
Sensitivity 81.0 52.3 80 70 91 73
Specificity 53.4 87.2 23 75 46 65
PPV 64.2 80.7 18 37 n/a 51
NPV 73.1 63.9 85 92 n/a 83

n/a = not reported in the study.