Table 2

Period prevalence and specific categories of longstanding health problem at 8 months, 18 months, and 3 years

8 months [95% CI]18 months [95% CI]3 years [95% CI]
Period prevalence(n=1752)(n=1521)(n=1172)
    With no effects on daily living48 (2.7%)72 (4.7%)54 (4.6%)
    With effects on daily living28 (1.6%)34 (2.2%)60 (5.1%)
    All76 (4.3%)106 (6.9%)114 (9.7%)
[3.5 to 5.4][5.8 to 8.4][8.2 to 11.6]
    Corrected for differential attrition77 (4.3%)110 (7.2%)121 (10.3%)
[3.5 to 5.4][6.0 to 8.6][8.7 to 12.2]
Specific problem categories(n=76)(n=106)(n=114)
    Asthma13 (17.1%)23 (21.7%)28 (24.6%)
    Eczema22 (28.9%)15 (14.2%)5 (4.4%)
    Other allergies04 (3.8%)6 (5.3%)
    Congenital abnormalities32 (42.0%)42 (39.6%)32 (28.1%)
    Developmental delay1 (1.3%)7 (6.6%)26 (22.8%)
    Hearing loss2 (2.6%)4 (3.8%)3 (2.6%)
    Other6 (8.1%)11 (10.3%)14 (12.2%)