Table 1

Procedures at which cancer was presumed missed (case) compared with procedures subsequently diagnosing cancer (control 1) and matched procedures at which benign focal lesions were identified (control 2)

Case: presumed missed cancer diagnosisControl 1: subsequent cancer diagnosisControl 2: benign focal lesions
OR (95% CI)OR (95% CI)
N454544
Xylocaine, n (%)45 (100)44 (97.8)44 (100.0)
Sedation, n (%)11 (24.4)19 (42.2)2.26 (0.92 to 5.56)10 (22.7)1.1 (0.43 to 3.02)
Professional background, n (%)
 Gastroenterologist27 (62.8)27 (62.8)Reference
 Surgeon10 (23.3)14 (32.6)0.71 (0.27 to 1.89)
 Other (nurse/radiologist/GP)6 (14.0)2 (4.7)3.00 (0.56 to 16.21)
 Performed by trainee, n (%)7 (16.3)7 (16.3)1.00 (0.32 to 3.14)
 Mean procedure performed per month26 (20.5)25 (15.7)1.00 (0.98 to 1.03)
Endoscopy list
 Procedures per list, mean (SD)8.5 (2.0)7.1 (2.0)1.42 (1.13 to 1.78)7.4 (2.5)1.25 (1.02 to 1.52)
 Points per list, mean (SD)9.4 (1.4)8.2 (1.7)1.64 (1.21 to 2.22)8.5 (2.0)1.36 (1.03 to 1.78)
 Only diagnostic gastroscopy performed, n (%)29 (64.4)19 (42.8)2.48 (1.06 to 5.80)27 (61.4)1.27 (0.51 to 2.91)
 Any colonoscopies performed, n (%)10 (22.2)15 (35.6)0.52 (0.20 to 1.31)12 (27.3)0.78 (0.30 to 2.10)
 Any sigmoidoscopies performed, n (%)8 (17.8)13 (28.9)0.53 (0.20 to 1.45)6 (13.6)1.41 (0.44 to 4.50)
 Any therapeutics performed, n (%)5 (11.1)10 (22.2)0.44 (0.14 to 1.40)7 (15.9)0.53 (0.14 to 1.95)
 Time of day (AM), n (%)25 (55.6)26 (57.8)0.91 (0.39 to 2.10)17 (38.6)1.91 (0.82 to 4.45)
 Last procedure on list, n (%)5 (11.1)1 (2.2)5.50 (0.62 to 49.11)4 (9.1)1.28 (0.32 to 5.13)
 Latter half of list, n (%)34 (75.6)34 (75.6)1.00 (0.38 to 2.61)37 (84.1)0.64 (0.22 to 1.88)