Table 3

Symptom prevalence and adjusted prevalence ratio by exposure zone

Symptom
Exposure Zone
Prevalence % (95% CI)
Adjusted prevalence ratioa (95% CI)

Dry Eye
High
7.1 (3.8 – 10.5)
1.12 (0.62 – 2.02)

Medium
7.5 (3.4 – 11.5)
1.11 (0.59 – 2.06)

Low
6.3 (3.9 – 8.7)
1.00

Overall
6.6 (4.7 – 8.6)


Any Eye Symptom
High
51.6 (43.8 – 59.5)
1.11 (0.92–1.34)

Medium
57.3 (50.6 – 64.1)
1.23 (1.05–1.45)

Low
47.1 (41.8 – 52.4)
1.00

Overall
50.0 (46.0 – 54.0)


More Frequent and/or Severe Eye Symptom
High
15.0 (10.2 – 19.7)
0.95 (0.64–1.40)

Medium
21.3 (15.4 – 27.1)
1.28 (0.89–1.83)

Low
16.0 (12.2 – 19.8)
1.00

Overall
17.2 (14.2 – 20.1)


Any Nasal Symptom
High
60.3 (52.4 – 68.2)
0.90 (0.77–1.04)

Medium
67.4 (61.0 – 73.9)
1.01 (0.89–1.14)

Low
67.2 (62.2 – 72.2)
1.00

Overall
66.6 (62.9–70.4)


More Frequent and/or Severe Nasal Symptom
High
30.8 (24.0 – 37.7)
1.00 (0.76–1.31)

Medium
38.2 (31.4 – 45.0)
1.20 (0.96–1.52)

Low
31.2 (26.5 – 36.0)
1.00

Overall
32.9 (29.2–36.6)


Any Throat Symptom
High
31.0 (23.4 – 38.6)
0.96 (0.73–1.28)

Medium
32.9 (26.5 – 39.3)
1.01 (0.79–1.30)

Low
33.5 (28.4 – 38.6)
1.00

Overall
33.1 (29.3–36.9)


More Frequent and/or Severe Throat Symptom
High
13.7 (9.0 – 18.4)
0.97 (0.63–1.49)

Medium
15.7 (10.7 – 20.6)
1.07 (0.72–1.59)

Low
14.8 (11.1 – 18.5)
1.00

Overall
14.9 (12.1–17.7)


CI = Confidence interval

aAdjusted for age, sex, cigarette smoke and internal garaging.

Capon et al. Environmental Health 2008 7:46   doi:10.1186/1476-069X-7-46