Prevalence of allergic sensitization, hay fever, eczema, and asthma in a longitudinal birth cohort

Figures & data

Figure 1 Percent prevalence of allergic sensitization, hay fever, eczema, and asthma at each assessment.

Notes: Allergic sensitization is based on the positive skin prick test. Current asthma at each assessment (physician diagnosis with symptoms or medications within the previous 12 months) is shown.

Figure 2 Percentage of subjects with asthma and other atopic traits at each assessment.

Figure 3 Percentage of subjects with allergic sensitization who had asthma at each assessment.

Notes: Allergic sensitization based on a current positive skin prick test. Only current asthma (symptoms or medications within previous 12 months) is shown.

Table 1 Predictive strength of allergic sensitization, hay fever and eczema for asthma at each assessment

Asthma diagnosis at each assessment	Allergic sensitization OR (95% CI)	Hay fever OR (95% CI)	Eczema OR (95% CI)
Asthma at 6 years of age (n=30)	2.3 (0.99–5.46), p=0.054	3.7 (0.85–15.75), p=0.081	4.8 (1.78–12.94), p=0.002
Asthma at 11 years of age (n=29)	3.4 (1.37–8.53), p=0.008	3.6 (1.51-8.54), p=0.004	6.1 (2.44–15.32), p<0.001
Asthma at 18 years of age (n= 19)	4.5 (1.41-14.57), p=0.011	5.9 (2.7-16.67), p=0.001	2.8 (0.65–12.08), p=0.167
Asthma at 24 years of age (n=24)	N/A, p=N/A	4.7 (1.73–12.76), p=0.002	1.4 (0.43–4.8), p=0.6

Notes: OR, odds ratio for having allergic sensitization, hay fever or eczema if asthma was diagnosed at each assessment. Allergic sensitization based on the positive skin prick test. Bold font indicates p<0.05.

Figure 4 Percentage of participants sensitized to mixed grass and house dust mite at each assessment.

Note: Sensitization was measured by the skin prick test, wheal ≥3×3 mm.