Table 1

Demographic characteristics of patients

	YC	YA	EC	EA	p‐value
	YC	YA	EC	EA	YA/EA	YC/YA	EC/EA	YC/EC
Age yrs	27 (27–32)	32.5 (24.0–45.0)	67.5 (61.0–71.0)	72 (67–75)
FEV₁ %	100 (98–102)	84 (73–98)	93.5 (88.0–96.0)	73.5 (52.0–91.0)	ns	<0.009	<0.04	<0.003
Duration^# yrs	N/A	10 (9–13)	N/A	13 (9–15)	ns	N/A	N/A	N/A

Data are expressed as median (25–75th percentiles)
YC: young controls
YA: young asthmatics
EC: elderly controls
EA: elderly asthmatics
N/A: not applicable
ns: nonsignificant
^#: of disease
p‐values by Mann-Whitney U‐test