Table 5:
Sensitivity and specificity thresholds of SFAQ.
Score
% patients needing
new
intervention
Score
% patients needing
new
intervention
Threshold
Sensitivity
Specificity
Positive
predictive value
Negative
predictive value
0
38%
≥1
54%
≥1
0.97
0.18
0.48
0.88
≤1
45%
≥2
48%
≥2
0.87
0.28
0.48
0.73
≤2
40%
≥3
51%
≥3
0.77
0.41
0.51
0.7
≤3
31%
≥4
54%
≥4
0.69
0.54
0.69
0.54
≤4
35%
≥5
55%
≥5
0.57
0.63
0.55
0.66
≤5
37%
≥6
57%
≥6
0.44
0.74
0.57
0.63
≤6
39%
≥7
63%
≥7
0.31
0.86
0.63
0.61
≤7
42%
≥8
70%
≥8
0.11
0.96
0.7
0.58