Infectious Diseases in Obstetrics and Gynecology / 2020 / Article / Tab 2

Research Article

Factors Associated with Antenatal Influenza Vaccination in a Medically Underserved Population

Table 2

Factors associated with antenatal influenza vaccination among pregnant women with deliveries.

CharacteristicVaccination rate (%)Vaccination unadjusted RR (95% CI)Vaccination adjusted RR (95% CI)

Age at delivery (years)
 <2146.10.92 (0.84–1.01)0.98 (0.88–1.09)
 21–3450.0refref
 >3452.31.05 (0.96–1.14)1.00 (0.91–1.09)
Race/ethnicity
 Black, non-Hispanic44.4refref
 Hispanic64.21.44 (1.35–1.54)1.38 (1.24–1.52)
 Other, non-Hispanic63.91.44 (1.29–1.60)1.21 (1.07–1.38)
 White, non-Hispanic37.10.83 (0.66–1.06)1.06 (0.84–1.33)
Interpreter use
 No interpreter46.0refref
 Spanish64.61.40 (1.31–1.51)1.00 (0.90–1.12)
 Other language58.71.28 (1.15–1.42)1.17 (1.04–1.32)
Parity
 048.9refref
 152.71.08 (0.95–1.23)1.06 (0.94–1.21)
 252.91.08 (0.99–1.19)1.05 (0.96–1.16)
 ≥348.10.99 (0.91–1.07)0.96 (0.87–1.06)
Chronic medical condition
 Asthma48.20.96 (0.86–1.08)1.06 (0.94–1.19)
 Cardiovascular disease45.50.91 (0.63–1.33)1.12 (0.78–1.59)
 Diabetes mellitus64.61.31 (1.12–1.52)1.29 (1.11–1.51)
 HIV-positive status58.01.17 (0.97–1.41)1.18 (0.97–1.42)
Tobacco use in pregnancy37.20.73 (0.64–0.83)0.85 (0.75–0.97)
Prenatal care adequacy
 Inadequate43.50.64 (0.59–0.69)0.68 (0.63–0.73)
 Intermediate66.90.98 (0.91–1.06)1.00 (0.92–1.09)
 Adequate68.3refref
 Adequate plus68.31.00 (0.91–1.10)1.00 (0.90–1.11)
 Unknown22.10.32 (0.28–0.38)0.33 (0.28–0.40)
Primary insurance type
 Self-pay38.90.81 (0.65–1.00)1.07 (0.86–1.32)
 Medicaid50.71.05 (0.91–1.22)1.09 (0.93–1.28)
 Medicare31.60.65 (0.33–1.29)0.76 (0.38–1.51)
 Private48.3refref

Influenza vaccination was defined as documented administration of influenza vaccine in the Grady Health System EHR, the Georgia Registry of Immunization Transactions and Services, or self-reported receipt of influenza vaccine within the time frame of twelve months before delivery and the delivery date. Data are %, relative risk (95% confidence interval), and adjusted relative risk (95% confidence interval); . Other, non-Hispanic race/ethnicity includes Asian, Hawaiian/other Pacific Islander, Native American, and multiple races.

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