Table 2

Odds ratios for the association between bus/tram use and ARI (n = 127)

Exposure

Cases

(n = 67)

Controls

(n = 60)

Unadjusted OR

(95% CI)

Model 1a: Adjusted OR (95% CI)

Model 2:

Adjusted OR

(95% CI)


Bus/tram usage in previous 5 days:

No

33 (49%)

31 (52%)

1.00

1.00

1.00

Yes

34 (51%)

29 (48%)

1.10 (0.55-2.21)

1.09 (0.50-2.38)

5.94 (1.33-26.5)b

Frequency of public transport use:

<once a week

40 (60%)

24 (40%)

1.00

1.00

1.00

1-3 times a week

9 (13%)

20 (33%)

0.27 (0.11-0.69)

0.27 (0.10-0.74)

0.54 (0.15-1.95)c

>3 times a week

18 (27%)

16 (27%)

0.68 (0.29-1.57)

0.81 (0.32-2.08)

0.37 (0.13-1.06)c

p-trend = 0.196

p-trend = 0.463

p-trend = 0.057


Missing data have been excluded from the analysis; statistically significant results in bold; a adjusted for age, gender and co-morbidity; badjusted for age, gender, co-morbidity, deprivation, child cohabitation, flu vaccination and frequency of habitual public transport use; cadjusted for age, gender, co-morbidity, child cohabitation, flu vaccination and deprivation

Troko et al. BMC Infectious Diseases 2011 11:16   doi:10.1186/1471-2334-11-16

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