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Table 2 Receiver operating curve analysis

From: Early and delayed assessments of quantitative gait measures to improve the tap test as a predictor of shunt effectiveness in idiopathic normal pressure hydrocephalus

Examination day Measures (change in time or step number from baseline) AUC p Sensitivity (%) Specificity (%) Cutoff
Day 1 (N = 63) TUG (s) 0.770 0.249 76.6 75.0 2.0
10Ti (s) 0.645 0.102 63.8 68.8 0.8
10St (step) 0.602 0.027* 36.1 93.8 4.5
Day 4 (N = 52) TUG (s) 0.677 0.283 43.9 90.9 5.0
10Ti (s) 0.711 0.383 63.4 81.2 2.3
10St (step) 0.579 0.053 34.1 90.0 5.5
Examination day Measures (change in percentage from baseline) AUC p Sensitivity (%) Specificity (%) Cutoff (%)
Day 1 (N = 63) TUG (%) 0.808 78.3 80.0 11.3
10Ti (%) 0.641 0.193 63.0 66.6 9.4
10St (%) 0.577 0.016* 41.3 86.7 13.6
Day 4 (N = 52) TUG (%) 0.599 0.109 73.2 50.0 10.0
10Ti (%) 0.738 0.483 63.4 90.0 15.8
10St (%) 0.560 0.036* 41.5 80.0 17.0
  1. ROC curve analysis showed the AUCs, sensitivities, specificities and cutoff values. The percent change from baseline of AUC on day 1 was regarded as a control and compared with other variables. Note the TUG on day 1, both for change in time and change in percentage, showed the highest AUC
  2. Statistical differences were noted in most of 10Sts (*), but not in other variables of the TUG and the 10Ti