Co-variates 2002 Survey 2012 Survey
Age (years). Mean (SD); min-max 43 (0.82); 41-44 53 (0.95); 50.94-55.58
Male. %(n/N) 50.3 (1,586/3,153) 50.3 (1,586/3,153)
Body mass index (kg/m2). Mean (SD); min-max 26.27 (4.61); 16.31- 52.33 28.4 (5.48); 16.9-58.86
Heating by indoor combustion of solid† or gas fuel. %(n/N) 53.2 (1,679/3,153) 43.8% (1,383/3,153)
Cooking by indoor combustion of solid† or gas fuel. %(n/N) 24.1 (757/3,153) 28.7 (886/3,081)
Years of education. %(n/N) < Grade 12 Grade 12 or equivalent > Grade 12 34.7 (1,093/3,153) 9.5 (300/3,153) 55.8 (1,755 /3,153) 32.7 (1,020/3,153) 7.8 (242/3,153) 59.6 (1,860/3,153)
Occupation. %(n/N) Managers and Professionals Associate Professionals Tradespersons and Advanced Clerical Intermediate clerical and production Elementary clerical, laborers and related 30.9 (970/3,135) 11.4 (357/3,135) 20.7 (648/3,135) 18 (563/3,135) 19 (597/3,135) 35 (1,087/3,105) 14.1 (439/3,105) 18.8 (585/3,105) 18 (558/3,105) 14 (436/3,105)
Smoking status. %(n/N) Never Former Current 44.5 (1,404 /3,143) 31.6 (995/3,143) 23.6 (744 /3,143) 44.5 (1,402/3,120) 38.4 (1,211/3,120) 16.1 (507 /3,120)
Current second-hand smoke. %(n/N) 11.6 (358 / 3,096) 7.8 (244/3,153)
Hay fever ever. %(n/N) 53 (1,660/3,153) 55.8 (1,757/3,153)
Living <200m from a major road 813 /3,153 (25.78%) 787 /3,048 (25.82%)
NO2 (ppb) median [IQR; 25-75%le] 4.24 [2.27; 3.43-5.7] 2.72 [2.21; 1.93-4.14]
PM2.5 (µg/m3) median [IQR; 25-75%le] 6.48 [1.49; 5.76-7.26] 6.4 [1.56; 5.63-7.19]