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Table 4 Asthma and traffic at residential address

From: Adult asthma and traffic exposure at residential address, workplace address, and self-reported daily time outdoor in traffic: A two-stage case-control study

   The 1st survey (2004) The 2nd survey (2005)   
Residential Address   n Asthma
n (%)
Asthma
(OR)1
n Asthma n (%) Asthma
(OR)1
Asthma
symptoms
n (%)
Asthma
symtoms
(OR)1
Self-report Heaviest road <50 m 0-1 cars/min - - - 445 105 (23.6) 1.0 71(16.0) 1.0
  < 2 cars/min - - - 1512 339 (22.4) 1.10 (0.81-1.5) 216(14.4) 0.95 (0.66-1.4)
  2-5 cars/min - - - 410 113 (27.6) 1.17 (0.80-1.7) 81(19.9) 1.2 (0.76-1.8)
  6-10 cars/min - - - 203 56 (27.6) 1.20 (0.74-2.0) 34(17.0) 0.79 (0.42-1.5)
  > 10 cars/min - - - 258 76 (29.5) 1.5 (0.94-2.3) 48(18.5) 1.2 (0.72-2.1)
GIS Heaviest road <50 m no heavy road 15584 1542 (9.9) 1.0 2100 494 (23.5) 1.0 316 (15.1) 1.0
  < 2 cars/min 3691 375 (10.2) 1.0 (0.90-1.2) 472 121 (25.6) 1.2 (0.89-1.6) 79 (16.8) 1.1 (0.81-1.6)
  2-5 cars/min 1555 159 (10.2) 0.95 (0.76-1.2) 216 61 (28.2) 1.2 (0.79-1.7) 39 (18.1) 1.1 (0.71-1.8)
  6-10 cars/min 307 35 (11.4) 1.0 (0.65-1.6) 34 10 (29.4) 1.0 (0.33-3.2) 7(20.6) 1.4 (0.39-5.1)
  > 10 cars/min 223 29 (13.0) 1.8 (1.1-2.8) 36 12 (33.3) 2.3 (0.99-5.2) 12 (33.3) 4.6 (2.0-10.6)
GIS Heaviest road <100 m no heavy road 10875 1062 (9.8) 1.0 1461 330 (22.6) 1.0 215 (14.7) 1.0
  < 2 cars/min 5741 589 (10.3) 1.1 (0.92-1.2) 744 197 (26.5) 1.4 (1.1-1.7) 128 (17.4) 1.2 (0.92-1.7)
  2-5 cars/min 3309 327 (9.9) 0.96 (0.81-1.1) 462 121 (26.2) 1.2 (0.88-1.6) 75 (16.3) 1.1 (0.80-1.7)
  6-10 cars/min 894 101 (11.3) 1.2 (0.92-1.6) 119 29 (24.4) 1.4 (0.82-2.3) 14 (11.8) 0.81 (0.38-1.7)
  > 10 cars/min 541 61 (11.3) 1.3 (0.95-1.8) 72 21 (29.2) 1.6 (0.82-3.2) 21 (29.2) 2.7 (1.3-5.5)
GIS Heaviest road <250 m no heavy road 4412 429 (9.7) 1.0 590 136 (23.1) 1.0 84 (14.2) 1.0
  < 2 cars/min 7079 698 (9.9) 1.0 (0.86-1.2) 904 225 (24.9) 1.1 (0.85-1.5) 147 (16.4) 1.1 (0.7-1.5)
  2-5 cars/min 6297 636 (10.1) 0.96 (0.82-1.1) 870 220 (25.3) 1.1 (0.83-1.5) 139 (16.1) 1.0 (0.7-1.4)
  6-10 cars/min 2100 222 (10.6) 1.1 (0.86-1.3) 298 68 (22.8) 1.2 (0.77-1.7) 42 (14.1) 1.0 (0.6-1.9)
  > 10 cars/min 1472 155 (10.5) 0.98 (0.76-1.3) 196 49 (25.0) 0.8 (0.51-1.4) 41 (20.7) 1.1 (0.6-1.9)
GIS NOx (μg/m3 ) (250 × 250 m) 0-8 11273 1111 (9.9) 1.0 1508 376 (24.9) 1.0 240 (16.0) 1.0
  8-11 3133 300 (9.6) 0.94 (0.79-1.1) 371 78 (21.0) 0.79 (0.56-1.1) 45 (12.3) 1.0 (0.74-1.49)
  11-14 2496 256 (10.3) 1.1 (0.93-1.3) 388 90 (23.2) 1.2 (0.86-1.6) 57 (14.8) 0.97 (0.68-1.39)
  14-19 2319 229 (9.9) 0.84 (0.69-1.0) 298 77 (25.8) 1.0 (0.73-1.5) 55 (18.4) 0.99 (0.60-1.6)
  > 19 2139 244 (11.4) 1.1 (0.93-1.4) 293 77 (26.3) 1.1 (077) 56 (19.1) 1.1 (0.60-1.9)
  1. 1Adjusted for age, sex, BMI, socio-economy, smoking, and occupational exposure. [OR(95%CI)]