Table 1

Annual decline in FEV₁ in ml/year versus mean (SD) FEV₁ in ml: the accuracy of the mean FEV₁ measurement is shown in square brackets

Study	Active	Placebo
EUROSCOP¹	2530 (640) ml	2540 (640) ml
	57 ml/year [127 ml]	69 ml/year [127 ml]
Copenhagen	2360 (790) ml	2390 (860) ml
City Lung Study²	45 ml/year [118 ml]	42 ml/year [120 ml]
ISOLDE³	1420 (470) ml	1400 (480) ml
	50 ml/year [71 ml]	59 ml/year [70 ml]
LHS II⁴	2280 (620) ml	2220 (650) ml
	44 ml/year [114 ml]	47 ml/year [111 ml]
BRONCUS^33,⁵¹	1600 (380) ml	1650 (390) ml
	56 ml/year [158 ml]	47 ml/year [160 ml]