Study	Reason for exclusion
Kay 2003	Non‐randomised study.
Khan 2000	Participants not treated with oral steroids at baseline
Matusiewicz 1992	Non 'randomised controlled trial'. 15 patients receiving cyclosporin showed improvements in lung function and reduction in doses of prednisolone.
Matusiewicz 1997	No placebo control.
Mungan 1995	Non 'randomised controlled trial'. 12 asthmatics treated with CyA for 3 months. No control group. Significant reductions in steroid dose and 34% improvement in FEV1.
Szceklik 1991	Non 'randomised controlled trial' . 12 asthmatics treated with CyA for 9 months. No control group. 6 of the patients responded to treatment.