Table 3. Logistic regression models of data from questionnaires and drawings comparing host factors and visits to specific sites at the exhibition for cases and controls.

Study population	Respondents to questionnaire and set of drawings; ORa (95% CI)(101 cases, 119 controls)
Age	1.1 (1.0 – 1.1)
Male sex	2.1 (1.0 – 4.5)
Smoking	6.0 (2.4 – 15.1)
Total hours at exhibition	2.2 (1.5 – 3.2)
Hours at consumer exhibition	0.5 (0.3 – 0.8)
Pausing at whirlpool spa in hall 3b	2.6 (1.1 – 6.6)
Pausing at bubblemat in hall 3b	3.0 (1.1 – 8.0)
Pausing in gangway of bubblemat in hall 3b	0.3 (0.1 – 0.8)

^aOR = odds ratio; CI = 95% confidence interval.

^bSee Figure 3.