Table 4 Proportion of agreement on the presence of ultrasound signs in the 5 common cases of ectopic pregnancy
From: Developing a knowledge base to support the annotation of ultrasound images of ectopic pregnancy
Sign annotations form the Ectopic Pregnancy Ontology | Agreement (n) | Lack of agreement (n) | Images (n) | Proportion of agreement (% and [95% CI]) |
|---|---|---|---|---|
Endometrial trilaminar pattern | 48 | 12 | 4 | 80.00 [69.88 - 90.12] |
Adnexal mass distinct from ovary | 143 | 37 | 12 | 79.44 [73.54 - 85.34] |
Embryo visible outside the uterine cavity | 45 | 15 | 4 | 75.00 [64.04 - 85.96] |
Gestational sac outside the uterine cavity | 226 | 104 | 22 | 68.48 [63.47 - 73.49] |
Adnexal mass adjacent to ovary | 122 | 58 | 12 | 67.78 [60.95 - 74.61] |
Gestational sac or trophoblast in a myometrial defect in previous caesarean section scar pregnancy site | 119 | 76 | 13 | 61.03 [54.18 - 67.88] |
Adnexal mass and corpus luteum at the same side | 82 | 53 | 9 | 60.74 [52.50 - 68.98] |
Adnexal rounded hyperechoic mass | 63 | 57 | 8 | 52.50 [43.57 - 61.43] |
Ring of fire sign | 39 | 36 | 5 | 52.00 [40.69 - 63.31] |
Yolk sac visible outside the uterine cavity | 64 | 71 | 9 | 47.41 [38.99 - 55.83] |
Adnexal mass as gestational sac with yolk sac | 22 | 38 | 4 | 36.67 [24.48 - 48.86] |
Caesarean section scar pregnancy peritrophoblastic blood flow | 19 | 41 | 4 | 31.67 [19.90 - 43.44] |
Intact endometrial midline echo | 14 | 31 | 3 | 31.11 [17.58 - 44.64] |
Tubal ring sign | 45 | 120 | 11 | 27.27 [20.47 - 34.07] |
Tubal ring without central identifying feature | 24 | 66 | 6 | 26.67 [17.53 - 35.81] |
Trophoblast visible outside the uterine cavity | 110 | 325 | 29 | 25.29 [21.21 - 29.37] |
Anterior distortion of uterus serosa | 24 | 96 | 8 | 20.00 [12.84 - 27.16] |
Smaller trophoblastic border distance to the anterior uterine serosa | 33 | 162 | 13 | 16.92 [11.66 - 22.18] |
Ectopic pregnancy wall more echogenic than corpus luteum wall | 21 | 114 | 9 | 15.56 [9.45 - 21.67] |
Fluid collection located centrally within the uterine cavity | 4 | 41 | 2 | 13.33 [1.17 - 25.50] |
Non intact endometrial midline echo | 4 | 41 | 3 | 8.89 [0.57 - 17.21] |
Gestational sac or trophoblast located at the level of internal cervical os | 10 | 125 | 9 | 7.41 [2.99 - 11.83] |
Gestational sac inside anterior myometrium and uterine cavity | 1 | 44 | 3 | 2.22 [0.00 - 6.52] |
Gestational sac located eccentricaly from uterine cavity | 1 | 149 | 10 | 0.67 [0.00 - 1.98] |
Total | 40.35 [38.64 - 42.05] |