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. 2016 Aug 22;2016(8):CD003424. doi: 10.1002/14651858.CD003424.pub4

Heijerman 1991.

Methods Randomised, double‐blind. placebo‐controlled cross‐over trial with 4 successive 14‐day treatment periods.
Participants 9 adults with CF, mean age 29 years, age range 23 ‐ 42 years. There were no withdrawals.
Interventions 4 consecutive 14‐day treatment periods:
 1. a high dose pancreatic enzyme, pancrelipase (Pancrease®) (4 capsules, 3 times daily) in conjunction with an oral proton pump inhibitor omeprazole 20 mg daily;
 2. a high dose pancreatic enzyme, pancrelipase (Pancrease®) (4 capsules, 3 times daily) in conjunction with placebo;
 3. a low dose pancreatic enzyme, pancrelipase (Pancrease®) (2 capsules, 3 times daily) in conjunction with an oral proton pump inhibitor omeprazole 20 mg daily;
 4. a low dose pancreatic enzyme, pancrelipase (Pancrease®) (2 capsules, 3 times daily) in conjunction with placebo.
Outcomes Faecal fat.
Notes  
Risk of bias
Bias Authors' judgement Support for judgement
Random sequence generation (selection bias) Unclear risk Described as randomised, but no details of method given.
Allocation concealment (selection bias) Unclear risk Not discussed
Blinding (performance bias and detection bias) 
 All outcomes Unclear risk Described as double‐blinded in text but no details given.
Incomplete outcome data (attrition bias) 
 All outcomes Low risk 9 participants randomised, data for all 9 presented, therefore there were no withdrawals.