Table 4.

Comparison of FEV1 between sensitised and non-sensitised patients with COPD 7.0–18.3% (weighted mean 13.6%

Author, year	FEV1 % of predicted		Number of patients
	Sensitised	Non-sensitised
Jin et al, 2014 [25]	37	41	142
Everaerts et al, 2017 [26]	41	43	300
Agarwal et al, 2010 [27]	52.9	48.9	200
Bafadhel, 2014 [28]	39	51	128
Weighted average (weighted SD)	43.0 (7.0)	45.5 (4.6)