Table 3.
Interobserver agreement for the different variables of US BI RADS descriptors
| US BI-RADS descriptor | Kappa (95% CI) without S-detect | Kappa (95% CI) with S-detect | p value |
|---|---|---|---|
| Shape | |||
| Oval | 0.4581 (0.3638;0.5524) | 0.6330 (0.5604;0.7055) | < 0.0001 |
| Round | 0.2062 (0.1119;0.3005) | 0.3001 (0.2275;0.3726) | < 0.0001 |
| Irregular | 0.4674 ( 0.3731;0.5617) | 0.6478 (0.5752;0.7203) | < 0.0001 |
| Echo pattern | |||
| Hypoechoic | 0.2713 (0.1770;0.3656) | 0.4114 (0.3389;0.4840) | < 0.0001 |
| Isoechoic | 0.0485 (− 0.0458; 0.1428) | 0.1951 (0.1225; 0.2676) | < 0.0001 |
| Iperechoic | 0.7890 (0.6947;0.8833) | − 0.006 (− 0.0808;0.0643) | < 0.0001 |
| Complex echogenicity | 0.2123 (0.1180; 0.3066) | 0.3681 (− 0.5985; 1.3346) | < 0.0001 |
| Heterogeneous | 0.1978 (0.1035;0.2921) | 0.3478 (0.0339;0.6618) | < 0.0001 |
| Margin | |||
| Circumscribed | 0.3011 (0.2068;0.3954) | 0.5970 (0.5184;0.6755) | < 0.0001 |
| Indistinct | 0.2029 (0.1086;0.2972) | 0.3917 (0.2711;0.5122) | < 0.0001 |
| Microlobulated | 0.1161 (0.0218;0.2104) | 0.4830 (0.3242;0.6419) | < 0.0001 |
| Angular | 0.1204 (0.0261;0.2147) | 0.3830 (0.0644;0.8304) | < 0.0001 |
| Spiculated | 0.1692 (0.0749;0.2635) | 0.2332 (0.1607; 0.3057) | < 0.0001 |
| Orientation | |||
| Parallel | 0.4179 (0.3236;0.5122) | 0.700 (0.5606;0.8392) | < 0.0001 |
| Not parallel | 0.4179 (0.3236;0.5122) | 0.700 (0.5606;0.8392) | < 0.0001 |
| Posterior features | |||
| None | 0.2699 (0.1756;0.3642) | 0.4568 (0.3699;0.5438) | < 0.0001 |
| Enhancement | 0.3032 (0.2089;0.3975) | 0.3876 (0.2049;0.5703) | 0.0006 |
| Shadowing | 0.3269 (0.2326;0.4212) | 0.7410 (0.5490; 0.9330) | < 0.0001 |
| Combined pattern | 0.1549 (0.0606;0.2492) | 0.6719 (0.1034; 1.2405) | < 0.0001 |