Both FEV1 and FVC improved significantly
more in the experimental group than in the control group.
After intervention, FEV1 had increased by 160 ml (95% CI
30 to 290) more in the experimental group than the control
group, which is a relative increase of 7% (95% CI 2 to 12).
FVC had increased by 330 ml (95% CI 200 to 460) more in
the experimental group than the control group, which is a
relative increase of 11% (95% CI 6 to 14).