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. 2005 Jan 24;2005(1):CD002738. doi: 10.1002/14651858.CD002738.pub2

Laviolette 1999.

Methods Setting: Multi‐center 
 Length of intervention period:12 to 16 weeks 
 Randomisation: yes, using a computer‐generated schedule 
 Allocation concealment: yes 
 Design: parallel group 
 Masking: double blind 
 Excluded: stated 
 Withdrawals: stated 
 Baseline characteristics: comparable 
 Jadad score: 4
Participants 642 patients, age >15 
 Inclusion criteria: None smokers 
 A history of intermittent or persistent asthma for at least one year 
 On inhaled corticosteroids for at least 6 weeks before the pre study visit 
 Exclusion criteria: Respiratory disorders other than asthma Upper respiratory infection within the 3 wk before the pre study visit Pregnancy
Interventions 1‐ montelukast 10 mg /day + BDP 200 mcg x 2/day(16 wk) 
 2‐ placebo tab + BDP 200mcg x 2/day (16 wk) 
 3‐ montelukast 10 mg/day + inhaled placebo (12 wk) 
 4‐ placebo tab/day + inhaled placebo (12 wk)
Outcomes FEV1 
 Morning PEFR Evening PEFR Daytime symptoms score B‐agonist use
Notes Missing data has been requested from the author
Risk of bias
Bias Authors' judgement Support for judgement
Allocation concealment? Low risk A ‐ Adequate