Intra-/Interobserver Agreement of Enhancement Pattern for Pancreatic Head Lesions Using Contrast-Enhanced Ultrasound: According to EFSUMB Guidelines
Abstract
:1. Introduction
2. Methods
Kappa | Agreement |
---|---|
<0 | Less than change agreement |
0.01–0.20 | Slight agreement |
0.21–0.40 | Fair agreement |
0.41–0.60 | Moderate agreement |
0.61–0.80 | Substantial agreement |
0.81–0.99 | Almost perfect agreement |
A1 | ||||
A2 | Hypo-enhanced | Iso-enhanced | Total | |
Hypo-enhanced | 30 | 4 | 34 | |
Iso-enhanced | 0 | 6 | 6 | |
Total | 30 | 10 | 40 | |
A1 | ||||
B | Hypo-enhanced | Iso-enhanced | Total | |
Hypo-enhanced | 25 | 5 | 30 | |
Iso-enhanced | 4 | 6 | 10 | |
Total | 29 | 11 | 40 | |
A2 | ||||
B | Hypo-enhanced | Iso-enhanced | Total | |
Hypo-enhanced | 27 | 2 | 29 | |
Iso-enhanced | 7 | 4 | 11 | |
Total | 34 | 6 | 40 |
Numerical value | Categorical value | |
---|---|---|
A1 and A2 | K = (0.9 − 0.11)/(1 − 0.11) = 0.89 | Almost perfect agreement |
A1 and B | K = (0.78 − 0.1)/(1 − 0.1) = 0.76 | Substantial agreement |
A2 and B | K = (0.78 − 0.12)/(1 − 0.12) = 0.7 | Substantial agreement |
3. Results
Biopsy | ||||
A1 | Adenocarcinoma | Pancreatitis | Total | |
Hypo-enhanced | 29 | 1 | 30 | |
Iso-enhanced | 6 | 4 | 10 | |
Total | 35 | 5 | 40 | |
Biopsy | ||||
A2 | Adenocarcinoma | Pancreatitis | Total | |
Hypo-enhanced | 32 | 2 | 34 | |
Iso-enhanced | 3 | 3 | 6 | |
Total | 35 | 5 | 40 | |
Biopsy | ||||
B | Adenocarcinoma | Pancreatitis | Total | |
Hypo-enhanced | 27 | 3 | 30 | |
Iso-enhanced | 8 | 2 | 10 | |
Total | 35 | 5 | 40 |
Group | Sensitivity (95% CI) | Specificity (95% CI) | PPV (95% CI) | NPV (95% CI) | Accuracy (95% CI) |
---|---|---|---|---|---|
A1 versusBiopsy | 83% (71–95) | 80% (68–92) | 97% (92–102) | 40% (25–55) | 83% (71–95) |
A2 versusBiopsy | 91% (82–100) | 60% (45–75) | 94% (87–101) | 50% (35–66) | 88% (78–98) |
B versusBiopsy | 77% (64–90) | 40% (25–55) | 90% (81–99) | 20% (8–32) | 73% (59–87) |
4. Discussion and Conclusions
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Grossjohann, H.S.; Ewertsen, C.; Svendsen, L.B.; Nielsen, M.B. Intra-/Interobserver Agreement of Enhancement Pattern for Pancreatic Head Lesions Using Contrast-Enhanced Ultrasound: According to EFSUMB Guidelines. Diagnostics 2012, 2, 2-9. https://doi.org/10.3390/diagnostics2020002
Grossjohann HS, Ewertsen C, Svendsen LB, Nielsen MB. Intra-/Interobserver Agreement of Enhancement Pattern for Pancreatic Head Lesions Using Contrast-Enhanced Ultrasound: According to EFSUMB Guidelines. Diagnostics. 2012; 2(2):2-9. https://doi.org/10.3390/diagnostics2020002
Chicago/Turabian StyleGrossjohann, Hanne Sønder, Caroline Ewertsen, Lars Bo Svendsen, and Michael Bachmann Nielsen. 2012. "Intra-/Interobserver Agreement of Enhancement Pattern for Pancreatic Head Lesions Using Contrast-Enhanced Ultrasound: According to EFSUMB Guidelines" Diagnostics 2, no. 2: 2-9. https://doi.org/10.3390/diagnostics2020002