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Table 6 Classification statistics for simulations compared to experimental results

From: Manual wheelchair downhill stability: an analysis of factors affecting tip probability

  Tip category
Forward tip Backward tip Rolled over Stopped
Prevalence 0.190 0.058 0.444 0.307
Sensitivity 0.778 0.818 0.929 0.914
Specificity 0.980 0.972 0.952 0.939
PPV 0.903 0.643 0.940 0.869
NPV 0.949 0.989 0.943 0.961
F1 score 0.836 0.720 0.934 0.891
  1. Rolling over the bump was the most common scenario, followed by being stopped by the bump. The F1 score was greatest for rolling over the bump, and least accurate for backward tips