Effect of traffic pollution on respiratory and allergic disease in adults: cross-sectional and longitudinal analyses

Table 2 Comparison of Gedling study participants included in data analyses with 1991 Gedling census population

Characteristic	1991 Gedling census popⁿ [20]*	Main cross- sectional analyses N = 2599	BHR analysis N = 2383	IgE analysis N = 2467	Longitudinal analysis of FEV₁ N = 1329
Age group (%)
18–29	24.9	16.0	16.5	15.2	10.1
30–39	21.2	21.3	21.7	21.2	19.8
40–49	22.0	25.6	27.1	26.1	27.8
50–59	16.7	20.1	20.3	20.2	25.7
60–70	15.2	17.1	14.5	17.2	16.7
Sex (%)
Men	49.4	50.0	50.4	50.1	49.6
Women	50.6	50.0	49.6	49.9	50.4
Mean (SD) Carstairs deprivation score	-1.29 (2.05)	-1.32 (2.17)	-1.34 (2.16)	-1.32 (2.17)	-1.53 (2.15)

BHR bronchial hyper-responsiveness; IgE immunoglobulin E.
*Age and sex %'s based on Gedling 1991 census population aged 18–69 (n = 74899); mean Carstairs based on total Gedling 1991 census population (n = 110127)
Census output is Crown copyright and is reproduced with the permission of the Controller of HMSO and the Queen's Printer for Scotland.

ISSN: 1471-2466