TABLE 2.

Variation in the prevalence of the different indicators of asthma, rhinoconjunctivitis and eczema among centres

		Percentiles (%)
		P10	P50	P90	Ratio of P90 to P10
6–7 years	Current wheeze	2.7	10.4	14.0	5.2
	Asthma ever	1.7	6.1	15.0	8.8
	Severe asthma symptoms	0.8	4.2	6.8	8.5
	Current rhinoconjunctivitis symptoms	2.4	7.0	15.1	6.3
	Hay fever ever	4.5	9.5	24.6	5.5
	Symptoms of severe rhinoconjunctivitis	0.1	0.4	1.0	11.1
	Current eczema symptoms	2.3	4.8	10.2	4.4
	Eczema ever	2.6	6.6	37.4	14.4
	Symptoms of severe eczema	0.1	0.6	1.5	15.0
13–14 years	Current wheeze	4.6	11.4	18.9	4.1
	Asthma ever	2.4	9.2	19.1	8.0
	Severe asthma symptoms	1.8	5.4	9.8	5.4
	Current rhinoconjunctivitis symptoms	7.0	12.3	21.3	3.0
	Hay fever ever	4.4	13.0	33.9	7.7
	Symptoms of severe rhinoconjunctivitis	0.2	0.6	1.6	8.0
	Current eczema symptoms	2.9	5.0	10.6	3.7
	Eczema ever	2.1	7.7	18.8	9.0
	Symptoms of severe eczema	0.3	0.7	1.7	5.7