Table 3

Predictors of healthcare workers' self-reported willingness to accept smallpox immunization, results of multivariate analysis


Odds ratio* (95% CI)
p-value

Perceived risk of a smallpox attack in U.S. within 2 years

<0.0001
     High/Intermediate
3.2 (2.4, 4.2)

     Low/Next to zero
Ref

     Can't guess
2.7 (1.7, 4.1)

Region

0.13
     Northeast
Ref

     Mid-Atlantic & Southeast
1.4 (1.0, 2.0)

     Midwest & West
1.5 (1.0, 2.3)

Main work area

0.16
     Emergency Department or ED consult
1.3 (1.0,1.7)

     Intensive Care Unit or ICU consult
Ref

     Other/none specified
1.4 (0.9, 2.2)

Profession

0.76
     Physician
Ref

     Non-physician clinician
1.1 (0.8, 1.6)

     Other/none specified
0.9 (0.6, 1.5)

Age

0.07
     Up to 29
1.5 (0.9, 2.4)

     30–39
1.1 (0.7, 1.6)

     40–49
1.0 (0.7, 1.5)

     50 or over
Ref

Gender

<0.001
     Female
Ref

     Male
1.4 (1.1, 2.0)

Ever vaccinated

0.046
     Yes
1.5 (1.0, 2.1)

     No
Ref

     Not sure
1.1 (0.7, 1.7)

Informed

<0.001
     Very well
2.0 (1.1, 3.7)

     Fairly well
1.5 (0.9, 2.4)

     Not well
1.0 (0.6, 1.7)

     Not at all
Ref


* adjusted for clustering within hospital and variation in the number of responses per hospital

Yih et al. BMC Public Health 2003 3:20   doi:10.1186/1471-2458-3-20