Neighbourhood walkability, road density and socio-economic status in Sydney, Australia

Table 2 Pearson’s correlation coefficients for weighted road density (WRD)^a and measured NO₂ at regulatory monitors

	Corrrelations (significance value)
Measured monitored site^b	WRD at Site CCD	WRD 200 m buffer (mean)	WRD 2 km buffer (mean)
Annual average (24 h mean) NO₂	0.92 (p < 0.001)	0.73 (p = 0.027)	0.79 (p = 0.007)
Annual average 1 h max NO₂ (mean)	0.86 (p < 0.001)	0.79 (p = 0.012)	0.83 (p = 0.003)

^aWRD calculated as the mean of WRD of CCDs: 1) at monitored site; 2) within a 200 m radius of each of 10 regulatory monitors; 3) within a 2 km radius of each of 10 regulatory monitors
^bMeasured NO₂ (2007) at monitored sites: 1) Annual average (24 h); 2) Annual average (1 h maximum) measured at 10 regulatory monitors

ISSN: 1476-069X