Figure 1.

A diagram showing how different physiological measurements were linked to later asthma outcomes in the study’s analyses. The analyses used data collected at recruitment to seven clinical trials and at follow-up assessments 3 and 6 months after recruitment. ^aAlthough %FEV₁ was the primary spirometric index, the following were also considered: %FEV₁/FVC, %FEF_25-75, and %FVC. Feno = fractional exhaled nitric oxide.