Table 2

How Caregivers Know When to Take Their Child for Immunizations. Adjusted Odds Ratios Predicting Up-to-date Status for 4:3:1:3:3 a, United States, National Immunization Survey, Parental Knowledge and Experiences Questionnaire, July 2001 – December 2002.b


Variable
Adjusted Odds Ratio
95% CI

How did you know when to take your child for his/her most recent immunization?
Doctor/Nurse at Previous Immunization Visit



     Chosen c
1.4
(1.0, 1.8) d

     Not Chosen
1.0
Referent

Shot Card/Record



     Chosen
0.9
(0.7, 1.2)

     Not Chosen
1.0
Referent

Reminder/Recall e



     Chosen
1.1
(0.7, 1.7)

     Not Chosen
1.0
Referent

Other f



     Chosen
1.2
(0.8, 1.6)

     Not Chosen
1.0
Referent


First Born Status



          No
1.0
Referent

          Yes
1.5
(1.2, 1.8)

Age of Mother



          ≤ 19 Years
1.0
Referent

          20–29 Years
0.8
(0.4, 1.4)

          ≥ 30 Years
1.2
(0.6, 2.2)

Poverty Status g



          Above, > $75 K
2.0
(1.4, 2.9)

          Above, ≤ $75 K
1.6
(1.2, 2.1)

          Below
1.0
Referent

          Unknown
2.2
(1.5, 3.4)

Metropolitan Statistical Area (MSA) Status



          MSA Central City
1.0
Referent

          MSA Non-Central City
1.4
(1.1, 1.7)

          Non-MSA
1.2
(0.9, 1.7)

Time from Last Immunization to Interview



     ≤ 6 months
2.8
(1.9, 4.1)

     7 – 12 months
2.0
(1.5, 2.7)

     ≥ 13 months
1.0
Referent

Age of Child at Interview



     19 – 24 months
0.3
(0.2, 0.4)

     25 – 29 months
0.6
(0.5, 0.8)

     30 – 35 months
1.0
Referent

a 4 or more doses of diphtheria and tetanus toxoids and pertussis vaccine, 3 or more doses of poliovirus vaccine, 1 or more doses of measles-containing vaccine, 3 or more doses of Haemophilus influenzae type b vaccine, and 3 or more doses of hepatitis B vaccine at 19–35 months of age

b Children in the Q3/2001–Q4/2002 National Immunization Survey were born between August 1998 and June 2001.

c Respondents could choose more than one response

d The lower bound was 1.01; the confidence interval (1.01, 1.8) does not contain 1.0.

e Outreach worker called/came to house to tell me, health department called me/sent me reminder, or physician's office called me/sent me reminder

f Relative/friend told me, found out during visit to doctor or other healthcare provider, day care/headstart requirement, WIC (Women, Infants, and Children) nurse told me, government program requirement, or other

g Poverty level depends on household income, year data was collected, and number of people living in household and is determined by the US Bureau of Census poverty threshold.

Shaw and Barker BMC Pediatrics 2005 5:44   doi:10.1186/1471-2431-5-44