Table 2

Reported prevalences of eczema and hay fever over period of 12 months at age16 and their association with potential risk factors

1974 (n=11 195)1986 (n=9387)
Potential risk factor% (No) of subjects% (No) with hay fever% (No) with eczema% (No) of subjects% (No) with hay fever% (No) with eczema
Sex
Female49.3 (5514)10.9 (602)3.9 (213)50.7 (4761)21.9 (1045)7.8 (373)
Male50.7 (5681)13.1 (746)2.4 (137)49.3 (4623)24.6 (1138)4.9 (226)
Birth weight(g)*
< 20000.9 (95)4.2 (4)3.2 (3)1.5 (128)17.2 (22)3.9 (5)
2001-25004.8 (494)10.9 (54)2.2 (11)4.9 (422)23.0 (97)5.5 (23)
2501-300019.3 (1970)12.4 (244)3.0 (59)19.1 (1654)24.0 (397)7.7 (127)
> 300074.9 (7654)12.3 (938)3.3 (250)74.6 (6460)23.3 (1504)6.2 (400)
Birth order
137.0 (3803)15.4 (584)3.7 (142)38.8 (3361)27.8 (933)7.1 (239)
230.7 (3155)12.6 (397)3.1 (98)33.5 (2899)22.4 (648)6.3 (182)
315.5 (1596)9.6 (154)2.9 (46)15.4 (1334)19.9 (266)5.3 (71)
47.9 (815)7.1 (58)2.9 (24)6.9 (598)16.9 (101)6.4 (38)
> 58.8 (900)5.9 (53)2.0 (18)5.4 (471)15.5 (73)5.3 (25)
Maternal age(years)
< 205.3 (564)10.6 (60)3.2 (18)8.9 (768)21.0 (161)6.0 (46)
20-2428.8 (3040)11.2 (339)3.7 (113)36.4 (3140)23.7 (745)6.0 (189)
25-2933.1 (3490)13.3 (464)2.9 (101)31.7 (2737)24.1 (659)7.3 (199)
30-3420.2 (2126)12.4 (264)3.1 (65)14.9 (1286)23.9 (307)6.6 (85)
35-3910.1 (1070)12.1 (129)2.5 (27)6.2 (536)20.3 (109)5.4 (29)
> 402.4 (255)8.2 (21)2.7 (7)1.9 (160)21.9 (35)3.8 (6)
Duration of breast feeding (months)
None31.2 (3045)9.7 (295)2.5 (77)61.9 (4835)22.1 (1068)6.0 (288)
< 1 month24.6 (2405)11.5 (276)3.0 (73)16.6 (1293)26.5 (343)6.1 (79)
> 1 month 44.2 (4315)14.4 (620)3.7 (158)21.5 (1682)26.0 (438)7.3 (122)
Maternal smoking during pregnancy
No66.9 (6975)13.2 (923)3.2 (223)57.9 (4997)24.7 (1236)6.9 (343)
Yes33.1 (3454)9.9 (341)3.0 (105)42.1 (3629)21.4 (775)5.8 (210)
Father's social class at birth14 15
I4.2 (425)18.8 (80)3.8 (16)5.2 (420)29.8 (125)8.1 (34)
II13.0 (1311)17.2 (226)3.6 (47)12.7 (1025)25.0 (256)6.7 (69)
IIINM10.0 (1000)17.2 (172)3.1 (31)13.5 (1094)26.9 (294)7.6 (83)
IIIM50.6 (5084)11.1 (563)2.9 (149)47.5 (3840)23.0 (884)6.0 (229)
IV12.4 (1244)7.6 (94)2.9 (36)15.0 (1213)19.5 (237)5.9 (71)
V9.8 (984)8.4 (83)4.0 (39)6.2 (499)18.2 (91)5.2 (26)
  • * Birth weight was measured in ounces in the 1958 cohort and converted to grams by multiplying by 28.35.

  • >=1 month in 1970 cohort.

  • Maternal smoking after the fourth month of pregnancy.