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Table 3 Sensitivity and specificity at different cut-off points in the total risk score

From: Development of a fall-risk assessment profile for community-dwelling older adults by using the National Health Interview Survey in Taiwan

Cut-off in the total risk scoreA(n)B(n)C(n)D(n)Sensitivity (%)Specificity (%)Σ%PV+(%)PV-(%)
0 vs. ≥1154760295172996.810.810720.493.5
0–1 vs. ≥2152257737698595.214.611020.992.8
0–2 vs. ≥314504923148183590.727.211822.892.5
0–3 vs. ≥414014367197239187.735.412324.392.4
0–4 vs. ≥513153808283295082.343.712625.791.2
0–5 vs. ≥612013193397356575.252.8128a27.390.0
0–6 vs. ≥710632621535413766.561.2128a28.988.5
0–7 vs. ≥89112091687466757.069.112630.387.2
0–8 vs. ≥97201427878533145.178.912433.585.9
0–9 vs. ≥106041099994565937.883.712235.585.1
0–10 vs. ≥114196411179611726.290.511739.583.8
0–11 vs. ≥123354701263628821.093.011441.683.3
0–12 vs. ≥131892081409655011.896.910947.682.3
0–13 vs. ≥14136142146266168.597.910648.981.9
0–14 vs. ≥154339155567192.799.410252.481.2
0–15 vs. ≥161210158667480.899.910154.581.0
0–16 vs. ≥1743159467550.3100.010057.180.9
  1. A, number of participants who were assigned to the high-risk group and who were fallers; B, number of participants who were assigned to the high risk group and who were not fallers; C, number of participants who were assigned to the low-risk group and who were fallers; D, number of participants who were assigned to the low-risk group and who were not fallers; Σ Sum of sensitivity (A/(A + C))and specificity (D/(B + D)); PV+: Positive predictive value (A/(A + B)); PV- Negative predictive value (D/(C + D))
  2. aMaximal sum of sensitivity and specificity