Table 2

 Sociodemographic associations with recorded infections, antibiotic prescriptions and total visits to general practitioner (GP) by age 5 years in cohort children

Total⩾25 infections by age 5⩾15 prescriptions by age 5Total visits to GP by age 5
n (%)p Valuen (%)p ValueMedian (range)p Value
*p for trend.
†Social class defined as I (professional), II (managerial and technical), III (skilled), IV (partly skilled); V (unskilled).
Sex
    Female29944 (16.0)0.2861 (22.2)0.9429 (7–107)0.02
    Male34262 (19.4)70 (21.9)32 (2–151)
Maternal atopy
    –23266 (16.9)0.4074 (19.0)0.0229 (2–124)0.004
    +40340 (19.7)56 (27.6)34 (5–151)
Paternal atopy
    –21054 (17.4)0.9372 (23.2)0.4432 (2–151)0.33
    +36639 (17.7)45 (20.4)29 (3–124)
Social class
    I/II16324 (15.3)0.06*33 (21.0)0.13*32 (5–151)0.86*
    III27438 (14.9)48 (18.8)29 (3–99)
    IV/V12629 (24.4)35 (29.4)32 (6–82)
Birth order
    127055 (22.2)0.02*63 (25.4)0.43*34 (4–151)<0.001*
    223635 (15.9)38 (17.3)28 (2–91)
    3+13616 (12.7)30 (23.8)27 (5–107)
Smoker in the home
    No37365 (17.8)0.9881 (22.1)0.9431 (3–151)0.73
    Yes21938 (17.7)47 (21.9)31 (2–107)