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. 2017 Apr 10;8:135. doi: 10.3389/fneur.2017.00135

Table 3.

Validation values for detection of 90° turns, separated by groups.

Cohorts Cohen’s kappa Acc Sens Spec NPV PPV Turns detected by algorithm Turns detected by clinical observers True positive turns False positive turns True negative turns False negative turns
All 0.82 0.91 0.93 0.89 0.90 0.92 2,393 2,304 2,150 243 1,884 154
PD ON-med. 0.68 0.83 0.92 0.78 0.74 0.93 681 652 602 79 609 50
PD OFF-med. 0.84 0.92 0.94 0.89 0.92 0.93 934 905 843 91 688 62
Controls 0.84 0.92 0.94 0.89 0.91 0.93 778 747 705 73 587 42

Acc, accuracy; NPV, negative predictive value; PD, Parkinson’s disease; OFF, medication off state; ON, medication on state; PPV, positive predictive value; Sens, sensitivity; Spec, specificity.

Validation values on a sample by sample basis are comparable (not shown).

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