Table 1.
Characteristics of the studies included.
| Author | Region | Gold standard | PL* | Study type | Number | Gender (F/M) | Age, years | TNM edition | Histopathological composition | UOCA volume, ml | Equipment |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Wang (22) | China | Pathology | E | R | 206 | 95/111 | 59.7 ± 11.3 | AJCC, 8th | NS | NS | Acuson Sequoia-512 |
| Shen (23) | China | Pathology | C | R | 59 | 14/45 | 51.4 ± 10.7 | NS | NS | 500–800 | NS |
| Li (14) | China | Pathology | E | R | 100 | 42/58 | 62.3 ± 2.6 | AJCC, 8th | Well, 10; moderately, 21; poorly, 66 | 500–800 | NS |
| Wang (15) | China | Pathology | E | R | 158 | 52/106 | 59.5 ± 10.6 | NS | Well, 22; moderately, 33; poorly, 65; signet ring, 16; mucinous, 8; squamous carcinoma, 1 | 500 | Acuson Sequoia-512 |
| He (13) | China | Pathology | E | R | 54 | 18/36 | 61.0 ± 9.7 | AJCC, 7th | NS | 500–800 | Philips iU22 |
| Li (24) | China | Pathology | E | P | 350 | 105/245 | 63.6 ± 11.8 | AJCC, 6th | NS | 500 | Acuson Sequoia-512 |
| Zheng (25) | China | Pathology | E | R | 162 | 35/127 | 58.3 ± 11.3 | NS | Well, 34; moderately, 31; poorly, 68; signet ring, 29 | 500 | Acuson Sequoia-512 |
| Chen (26) | China | Pathology | C | R | 143 | 54/89 | 56.0 ± 11.4 | NS | NS | 600 | Acuson Sequoia-512 |
*PL, publication language; C, Chinese; E, English; P, prospective; R, retrospective; UOCA, ultrasonic oral contrast agent; NS, not specified.