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Table 2 Environmental characteristics of the study population by age group.

From: Socioeconomic position and health status of people who live near busy roads: the Rome Longitudinal Study (RoLS)

  Age (years)
  0-17 18-34 35-64 65-74 75+ Total
N 289,539 420,169 821,153 214,332 153,705 1,898,898
Distance from HTR
mean (sd) %
302 (506) 286 (480) 274 (457) 241 (420) 208 (340) 272 (459)
> = 250 37.4 35.6 34.4 30.2 25.9 34.0
[150-250) 20.5 20.2 20.6 21.4 21.5 20.7
[100-150) 14.0 14.3 14.6 15.4 16.2 14.6
[50-100) 12.9 13.5 13.8 14.7 16.0 13.9
< = 50 15.3 16.4 16.6 18.3 20.4 16.9
Meters of HTR within 150 m from home
mean (sd) for those who live at < = 150 m from HTR % 268 (159) 271 (161) 272 (161) 276 (163) 282 (166) 272 (161)
living at > = 150 m from HTR 57.9 55.8 55.1 51.6 47.4 54.6
1st quartile (<166 m) 10.8 11.2 11.3 11.7 12.2 11.3
2nd quartile (166-266 m) 10.7 11.1 11.3 11.9 12.9 11.3
3rd quartile (266-323 m) 10.6 11.0 11.2 12.3 13.1 11.3
4th quartile (323-1445 m) 10.0 11.0 11.1 12.5 14.4 11.3
Daily average traffic count on the closest HTR within 150 m
mean (sd) for those who live at < = 150 m from HTR % 21686 (14272) 21832 (14255) 21774 (14006) 21975 (13497) 21920 (12776) 21533 (15094)
living at > = 150 m from HTR 57.9 55.8 55.1 51.6 47.4 54.6
(10000-15000) 17.9 18.4 18.7 19.3 20.7 18.8
[15000-20000) 7.9 8.5 8.5 9.0 9.6 8.6
[20000-30000) 7.9 8.3 8.5 9.6 10.7 8.7
> = 30000 8.4 9.0 9.2 10.4 11.6 9.4
Traffic density from HTR within 150 m (vehicle meters of HTR/m 2 )
mean (sd) for those who live at < = 150 m from HTR % 105 (91) 107 (91) 106 (88) 109 (85) 111 (81) 107 (88)
living at > = 150 m from HTR 57.9 55.8 55.1 51.6 47.4 54.6
1st quartile (< = 51) 11.4 11.3 11.4 11.2 11.4 11.3
2nd quartile (52-82) 10.5 11.1 11.3 12.1 12.8 11.3
3rd quartile (83-137) 10.3 10.9 11.2 12.4 13.9 11.3
4th quartile (137-1257) 9.9 10.9 11.1 12.7 14.5 11.3