Results of mixed logistic regression analysis for factors associated with OGD completion
| Trainee and training factors | Number of trainees (%) | OR (95% CIs) | p Value |
|---|---|---|---|
| Number of procedures | |||
| <50 | 307 (24.5) | Reference | |
| 50–99 | 184 (14.7) | 1.7 (1.3 to 2.0) | 0.002 |
| 100–149 | 127 (10.1) | 2.3 (1.9 to 2.6) | <0.0001 |
| 150–199 | 71 (5.7) | 2.9 (2.5 to 3.4) | <0.0001 |
| 200–249 | 140 (11.2) | 3.8 (3.4 to 4.2) | <0.0001 |
| >250 | 426 (33.9) | 4.8 (4.3 to 5.2) | <0.0001 |
| Adjusted intensity (range 1–112) | |||
| <10 | 439 (36.6) | Reference | |
| 10–19 | 509 (42.4) | 0.86 (0.6 to 1.1) | 0.20 |
| 20–29 | 142 (11.8) | 0.98 (0.6 to 1.3) | 0.89 |
| ≥30 | 110 (9.2) | 1.4 (0.9 to 1.9) | 0.20 |
| Missing | 54 | ||
| Number of trainers (range 1–54) | |||
| <10 | 780 (62.2) | Reference | |
| ≥10 | 475 (37.8) | 0.92 (0.7 to 1.2) | 0.52 |
| Trainee age (range 25–52 years) | |||
| <30 | 206 (16.7) | Reference | |
| 30–35 | 475 (38.6) | 1.6 (1.3 to 1.8) | <0.0001 |
| >35 | 550 (44.7) | 2.1 (1.9 to 2.4) | <0.0001 |
| Missing | 24 | ||
| Trainee specialty | |||
| Gastroenterologist | 562 (46.5) | Reference | |
| GI surgeon | 521 (43.1) | 1.2 (1.0 to 1.5) | 0.09 |
| Nurse endoscopist | 126 (10.4) | 0.4 (0.0 to 0.9) | <0.0001 |
| Breaks in training >6 months | |||
| No | 881 (70.2) | Reference | |
| Yes | 374 (29.8) | 0.95 (0.8 to 1.2) | 0.62 |
| Flexible sigmoidoscopy experience >50 | |||
| No | 1054 (84.0) | Reference | |
| Yes | 201 (16.0) | 1.3 (1.0 to 1.6) | 0.05 |
| Colonoscopy experience >50 | |||
| No | 817 (65.1) | Reference | |
| Yes | 438 (34.9) | 1.6 (1.3 to 1.8) | 0.0004 |
| Completed basic endoscopy course | |||
| No | Reference | ||
| Yes | 0.9 (0.6 to 1.1) | 0.38 | |
| Baseline level of OGD experience | |||
| None | 248 (19.8) | Reference | |
| 1–20 | 80 (6.4) | 0.8 (0.4 to 1.3) | 0.43 |
| Unknown | 927 (73.9) | 1.1 (0.9 to 1.3) | 0.40 |
| Patient factors | Number of OGDs (%) | OR (95% CIs) | p Value |
| Age | |||
| <40 | 22 502 (12.8) | Reference | |
| 40–64 | 74 854 (42.7) | 0.9 (0.9 to 1.0) | 0.08 |
| >65 | 77 827 (44.4) | 0.8 (0.7 to 0.9) | <0.0001 |
| Gender | |||
| Male | 90 669 (51.8) | Reference | |
| Female | 84 532 (48.2) | 1.2 (1.2 to 1.2) | <0.0001 |
| Sedation for procedure | |||
| No sedation | 89 425 (51.0) | Reference | |
| Sedation | 85 776 (49.0) | 0.7 (0.7 to 0.8) | <0.0001 |
| Diagnosis at OGD | |||
| Normal | |||
| Absent | 174 570 (71.7) | Reference | |
| Present | 68 985 (28.3) | 2.8 (2.8 to 2.9) | <0.0001 |
| Achalasia | |||
| Absent | 242 771 (99.7) | Reference | |
| Present | 784 (0.3) | 0.5 (0.2 to 0.8) | <0.0001 |
| Barrett’s oesophagus | |||
| Absent | 224 103 (92.0) | Reference | |
| Present | 19 452 (8.0) | 1.1 (1.0 to 1.2) | 0.22 |
| Diverticulum | |||
| Absent | 242 218 (99.5) | Reference | |
| Present | 1337 (0.5) | 0.9 (0.6 to 1.1) | 0.23 |
| Polyps | |||
| Absent | 232 384 (95.4) | Reference | |
| Present | 11 171 (4.6) | 1.2 (1.1 to 1.4) | <0.0001 |
| Malignancy | |||
| Absent | 236 963 (97.3) | Reference | |
| Present | 6592 (2.7) | 0.3 (0.2 to 0.4) | <0.0001 |
| Extrinsic compression | |||
| Absent | 243 187 (99.8) | Reference | |
| Present | 368 (0.2) | 0.4 (0.0 to 0.7) | <0.0001 |
| Varices | |||
| Absent | 232 559 (95.5) | Reference | |
| Present | 10 996 (4.5) | 0.7 (0.6 to 0.8) | <0.0001 |
| Peptic ulcer disease | |||
| Absent | 146 205 (60.0) | Reference | |
| Present | 97 350 (40.0) | 1.3 (1.2 to 1.4) | <0.0001 |
| Other | |||
| Absent | 188 705 (63.6) | Reference | |
| Present | 108 111 (36.4) | 0.5 (0.4 to 0.6) | <0.0001 |
| Random effects | SD | ||
| Trainee | 1.06 | ||
| Hospital | 0.88 | ||
OGD, oesophago-gastro-duodenoscopy.