Table 1

Limits for considering data implausible

VariablePlausible rangeNumber of implausible values, n (% of complete dataset)
Colonoscopy withdrawal time (negative and complete to caecum)1–60 min147 (2.7)
Midazolam dose0.5–10 mg132 (0.36)
Fentanyl dose12.5–200 μg26 (0.07)
Pethidine dose12.5–200 mg113 (0.31)