TABLE 4.

The slope in %predicted per year and z‐score per year for both the forced expiratory volume in 1 s (FEV₁) and the forced vital capacity (FVC), including 95% confidence interval (CI)

		%predicted			z‐score
			95% CI			95% CI
		Slope	Lower	Upper	Slope	Lower	Upper
FEV1	All	−0.97	−1.22	−0.71	−0.07	−0.10	−0.05
	Children	−1.43	−1.80	−1.05	−0.12	−0.15	−0.09
	Adults	0.01	−0.36	0.38	0.02	0.00	0.05
FVC	All	−0.81	−1.05	−0.56	−0.07	−0.10	−0.05
	Children	−1.46	−1.78	−1.14	−0.12	−0.15	−0.09
	Adults	0.35	0.01	0.69	0.04	0.01	0.06