Table 1—

Prevalence of current smoking, chronic mucus hypersecretion(CMH), exercise-induced shortness of breath (SOB) and asthma at the three surveys, 1976–2004, among 20–35-yr-old Danes

FemalesMales
Current smokers
 1976–197860.4 (403)62.1 (391)#
 1991–199446.8 (310)47.2 (290)#
 2001–200432.8 (127)32.9 (107)#
CMH
 1976–19787.1 (47)9.2 (58)#
 1991–19947.5 (50)10.8 (66)*
 2001–20048.0 (31)10.9 (35)*
Exercise-induced SOB
 1976–1978NANA
 1991–199434.2 (227)20.9 (128)
 2001–200429.7 (115)18.0 (59)
Asthma
 1976–19781.7 (11)1.2 (8)#
 1991–19944.8 (33)4.5 (28)#
 2001–20047.7 (30)5.9 (19)*
  • Data are presented as % (n). NA: not available. #: p = nonsignificant versus females; : p<0.002; *: p<0.05.