Daugbjerg 1996 Form 12.

Methods	Study design: Randomized, double blind, cross over Study location: Denmark Wash‐out: Not reported Exercise challenge: Treadmill for 6 min. up to 150 bpm Criteria for EIB diagnosis: FEV1 fall >22% after exercise challenge
Participants	Number of subjects: 16 % of males: 81% Age range: 10‐14 years Ethnicity: Not reported Withdrawal or drop out: 0
Interventions	Drug administration: Single dose Time of exercise challenge after drug administration: 3 hours, 12 hours Intervention: Salbutamol 400 mcg, Formoterol 12 mcg Control: Placebo Other drug arms: None Concomitant inhaled corticosteroid (ICS) treatment: Allowed
Outcomes	Primary available: Max FEV1 % fall; % protection; FEV1 % fall AUC Secondary available: None
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Insufficient information
Allocation concealment (selection bias)	Unclear risk	Insufficient information
Blinding of participants and personnel (performance bias) All outcomes	Low risk	Double blind study
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Insufficient information
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	Insufficient information
Selective reporting (reporting bias)	Unclear risk	Insufficient information
Other bias	Unclear risk	Insufficient information