| |
Mean dose cutpoint (cGy)
|
Number (%) of aspirators above cutpoint (sensitivity)
|
Number (%) of non-aspirators below cutpoint (specificity)
|
Positive likelihood ratio: sensitivity/(100-specificity)
|
PPV(%)a
|
NPV(%)b
|
RRc
|
|---|
|
Structure
|
|
AE Folds
|
6500
|
9/10 (90.0)
|
13/19 (68.4)
|
2.81
|
60.0
|
92.9
|
8.4
|
|
Arytenoids
|
6000
|
8/10 (80.0)
|
14/19 (73.7)
|
3.04
|
61.5
|
87.5
|
4.9
|
|
Glossoepiglottic fold
|
7000
|
10/10 (100.0)
|
8/19 (42.1)
|
1.73
|
47.6
|
100.0
|
undefined
|
|
Cricoid cartilage
|
6000
|
7/10 (70.0)
|
14/19 (73.7)
|
2.66
|
58.3
|
82.4
|
3.3
|
|
Thyroid cartilage
|
6450
|
9/10 (90.0)
|
14/19 (73.7)
|
3.42
|
64.3
|
93.3
|
9.6
|
|
Epiglottis
|
7225
|
7/10 (70.0)
|
14/19 (73.7)
|
2.66
|
58.3
|
82.3
|
3.3
|
|
Suprahyoid epiglottis
|
6810
|
10/10 (100.0)
|
9/19 (47.4)
|
1.90
|
50.0
|
100.0
|
undefined
|
|
Infrahyoid epiglottis
|
6300
|
9/10 (90.0)
|
12/19 (63.2)
|
2.45
|
56.3
|
92.3
|
7.3
|
|
Total larynx
|
6100
|
9/10 (90.0)
|
13/19 (68.4)
|
2.85
|
60.0
|
92.9
|
8.5
|
|
Supraglottic larynx
|
6650
|
9/10 (90.0)
|
13/19 (68.4)
|
2.85
|
60.0
|
92.9
|
8.5
|
|
Subglottic larynx
|
5750
|
7/10 (70.0)
|
13/19 (68.4)
|
2.66
|
53.9
|
81.3
|
2.9
|
|
Glottic larynx
|
6100
|
8/10 (80.0)
|
14/19 (73.7)
|
2.81
|
61.5
|
87.5
|
4.9
|
- aPPV should be greater than the a priori prevalence of aspiration which is 34.5%
- bNPV should be greater than the a priori prevalence of no aspiration which is 65.5%
- cRR is undefined if denominator is zero
