Table 1.

Definitions of Pancreatic Exocrine Insufficiency after pancreaticoduodenectomy

Ref.	Definition of pancreatic exocrine insufficiency
Sabater et al[8]	Condition wherein the amount of pancreatic secretions is not enough to maintain normal digestion
Ghaneh et al[28]	Need for new pharmacological intervention for exocrine insufficiency i.e. PERT
Sikkens et al[11]	Faecal elastase-1 < 0.200 mg/g of faeces
Halloran et al[29]	Coefficient of fat absorption < 93%
Domínguez-Muñoz et al[30]	13C-mixed triglyceride test (Percent cumulative dose of < 5% of 13CO2 at 7 h)
Yamaguchi et al[31]	BT-PABA excretion rate of < 70%
Kato et al[32]	Abnormal secretin stimulation test
Perez et al[33]	72 h faecal fat estimation
Fang et al[34]	Faecal chymotrypsin estimation

PERT: Pancreatic enzyme replacement therapy.