Table 1.

Characteristics of included trials with IPD

Trial (year)[ref.]	N	β2-Agonist
Anderson (2001) [17]	27	Salbutamol
Boner (1994) [18]	15	Salbutamol
de Benedictis (1998) [19]	12	Salbutamol
Henriksen (1992) [20]	12	Salbutamol
Pearlman (2007) [21]	15	Salbutamol
Robertson (1994) [22]	8	Salbutamol
de Benedictis (1996) [23]	12	Salmeterol
Green (1992) [24]	13	Salmeterol
Simons (1997) [25]	11	Salmeterol
Dinh Xuan (1989) [26]	10	Terbutaline
Henriksen (1983) [27]	14	Terbutaline
Debelic (1988) [28]	16	Reproterol
Walker (1986) [29]	12	Bitolterol
Schoeffel (1981) [30]	10	Metaproterenol
All IPD trials	187