Table 1

 Prevalence of asthma, eczema-urticaria, hay fever, and combined allergic diseases among 14 140 students of Glasgow University born 1918–52

ParticipantsAsthmaEczema-urticariaHay feverAllergy*
% (N)% (N)ptrend% (N)ptrend% (N)ptrend% (N)ptrend
*Allergy refers to the participant reporting any of the three diseases (asthma, eczema-urticaria, or hay fever).
Age at university examination
    16–1959.3 (8386)3.3 (277)0.1584.0 (332)0.0726.6 (549)0.00112.1 (1012)0.159
    20–2433.4 (4717)3.3 (157)4.4 (206)6.3 (299)11.9 (561)
    25–297.3 (1037)2.2 (23)5.4 (56)3.6 (37)10.0 (104)
Sex
    Male75.9 (10732)3.6 (382)<0.0013.6 (382)<0.0016.1 (655)0.17511.4 (1223)0.002
    Female24.1 (3408)2.2 (75)6.2 (212)6.8 (230)13.3 (454)
Sibship size
    018.6 (2634)2.5 (91)0.3334.7 (123)0.0247.9 (207)<0.00113.8 (364)<0.001
    136.8 (5197)3.3 (169)4.6 (238)6.4 (330)12.2 (633)
    223.6 (3339)3.3 (109)3.6 (119)6.1 (203)11.4 (379)
    3+21.0 (2970)3.0 (88)3.8 (114)4.9 (145)10.1 (301)
Birth order
    155.8 (7885)3.6 (281)0.0074.3 (338)0.2477.0 (550)<0.00112.7 (1002)<0.001
    226.7 (3769)3.0 (113)4.4 (166)5.9 (222)11.7 (439)
    3+17.6 (2486)2.5 (63)3.6 (90)4.6 (113)9.5 (236)
Childhood socioeconomic position
    I20.9 (2952)3.5 (104)0.5715.0 (148)0.0067.8 (230)<0.00113.7 (404)<0.001
    II36.8 (5200)3.0 (158)4.2 (220)6.9 (356)12.1 (628)
    III35.7 (5053)3.3 (168)3.8 (194)5.1 (257)11.0 (556)
    IV–V6.6 (935)2.9 (27)3.4 (32)4.5 (42)9.5 (89)
Period of birth
    1918–3024.9 (3518)2.7 (96)0.8964.8 (169)0.0115.2 (183)0.00511.1 (392)0.638
    1931–3937.8 (5345)3.6 (194)4.2 (222)6.4 (344)12.2 (650)
    1940–5237.3 (5277)3.2 (167)3.9 (203)6.8 (358)12.0 (635)
Family history of allergy
    No90.1 (12736)2.7 (349)<0.0013.7 (467)<0.0015.3 (670)<0.00110.3 (1305)<0.001
    Yes9.9 (1404)7.7 (108)9.1 (127)15.3 (215)26.5 (372)