ΔAi/BSA of 3rd-6th generation ΔAi/BSA of 3rd-6th generation ΔAi/BSA of 7th-9th generation ΔAi/BSA of 7th-9th generation
r P r P
ΔFEV1 0.636 0.001 0.111 0.545
ΔFVC 0.506 0.003 0.192 0.293
ΔFEV1/FVC 0.297 0.099 0.086 0.641
ΔMMEF 0.391 0.027 0.014 0.939
ΔMEF25 0.306 0.089 0.010 0.959
ΔMEF50 0.03 0.101 0.079 0.506