Table 1. Baseline study characteristics and patient demographics.
| Study, year | Techniques compared | Total Patients, N | Study completion, N | Mean/ Median Age, n | Male proportion, % | Indication for colonoscopy, % | Type of Colonoscope used | |
| HD | ECU/ECV | |||||||
| Biecker, 2015 26 | HD ECU | 253 245 | 249 240 | 68 65 | 51.8 % 47.8 % | S: NR D: NR | S: NR D: NR | Fujifilm EC-590 WM4, EC-590 WL4, Olympus CF-H180 AI |
| De Palma, 2018 27 | HD ECU | 144 144 | 137 137 | 55.7 55.1 | 52.6 % 51.8 % | S: 66.4 % D: 33.6 % | S: 65.0 % D: 35.0 % | Olympus CF-HQ190, CF-Q180AL/I |
| Floer, 2014 28 | HD ECU | 248 252 | 243 249 | 63 64 | 44.9 % 49.0 % | S: NR D: NR | S: NR D: NR | Olympus CF-H180AI/AL, Fujifilm EC-590 WM4 /WL4 |
| Van Doorne, 2017 31 | HD ECU | 533 530 | 514 486 | 65 65 | 53.5 % 49.8 % | S: 51.8 % D: 48.2 % | S: 51.9 % D: 48.1 % | Olympus CF-H180AL, CF-HQ190 L, PCF-H180AL, Fujinon EC 350-WL |
| Wada, 2018 32 | HD ECU | 238 239 | 237 235 | 62.2 61.2 | 48.3 % 51.0 % | S: 58.0 % D: 42.0 % | S: 58.6 % D: 41.4 % | Olympus PCF-H290ZI, CF-HQ290, CF-HQ290ZI |
| Rex (1), 2018 34 | HD ECU | 316 316 | 295 299 | 62.6 63.2 | 52.9 % 52.8 % | S: 94.6 % D: 5.4 % | S: 92.3 % D: 7.7 % | Olympus H190, H180 series |
| Bhattacharyya, 2017 25 | HD ECV | 267 267 | 265 266 | 67 68 | 67.9 % 60.9 % | S: 100 % D: 0 % | S: 100 % D: 0 % | Olympus CF-H260 |
| Jacob, 2019 29 | HD ECV | 146 214 |
138 182 |
NR NR |
50.7 % 56.7 % |
S: NR D: NR |
S: NR D: NR |
Olympus CF-190 L/I, CF-H180 L/I, PCF-H180AL/I, PCF-H190 L/I |
| Ngu, 2017 15 | HD ECV | 884 888 | 884 888 | 62.1 61.7 | 56.8 % 57.1 % | S: 45.6 % D: 54.4 % | S: 44.4 % D: 55.6 % | Olympus (details not reported) |
| Rex (2), 2019 30 | HD ECV | 99 101 | 99 101 | 61.7 62.7 | 42.4 % 56.4 % | S: NR D: NR | S: NR D: NR | Olympus (details not reported) |
| Von Figura, 2019 33 | HD ECV | 125 125 | 122 118 | 65.3 63.6 | 62.9 % 51.7 % | S: 38.5 % D: 61.5 % | S: 45.8 % D: 54.2 % | Olympus CF-HQ190 |
| Karsenti, 2020 35 | HD ECV | 1032 1032 | 1032 1026 | 57.4 59.3 | 48.9 % 47.4 % | S: NR D: NR | S: NR D: NR | Olympus CF-H190, Fujifilm EC-690 WM/EC-600 WM |
D, diagnostic/others; ECU, first-generation Endocuff colonoscopy; ECV, Endocuff Vision colonoscopy; HD, high-definition colonoscopy; N, no of patients; n, mean/median; NR, not reported; S, screening/surveillance.