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Table 4.1. Annual percent of adults aged 50 years and over who received influenza vaccine in the past 12 months, by age group and sex: United States, 1997 - 2001

Age and sex

1997

1998

1999

2000

2001

Percent (95% confidence interval)

50-64 years
Total
Men
Women

31.9(30.5-33.3)
28.0(26.1-29.9)
35.5(33.6-37.4)

33.1(31.7-34.5)
29.0(27.0-31.0)
37.0(35.1-38.9)

34.1(32.8-35.4)
30.5(28.6-32.4)
37.4(35.5-39.3)

34.6(33.1-36.1)
31.8(29.8-33.8)
37.1(35.1-39.1)

32.2(30.8-33.5)
30.2(28.3-32.2)
33.9(32.1-35.7)

65 years and over
Total, crude
Total, age adjusted
Men
Women

63.2(61.9-64.6)
63.1(61.7-64.4)
64.8(62.5-67.1)
62.1(60.5-63.7)

63.3(61.9-64.7)
63.3(61.9-64.6)
63.7(61.5-65.9)
63.0(61.2-64.8)

65.7(64.3-67.2)
65.1(63.6-66.5)
67.2(65.0-69.4)
64.6(62.7-66.5)

64.3(62.9-65.7)
64.0(62.6-65.4)
65.9(63.7-68.1)
63.2(61.5-64.9)

63.0(61.6-64.4)
63.1(61.7-64.5)
64.7(62.4-67.0)
61.7(59.9-63.4)

NOTES: Respondents were asked if they had received an influenza vaccination during the past 12 months. Responses to this question cannot be used to determine when during the preceding 12 months the subject received the influenza vaccination. In addition, estimates are subject to recall error, which will vary depending on when the question is asked because the receipt of influenza vaccinations is seasonal. The analysis excluded those with unknown influenza vaccination status (about 1% of respondents). Age-adjusted estimates for persons aged 65 years and over for this Healthy People 2010 leading health indicator are based on the projected year 2000 standard population using two age groups: 65-74 years and 75 years and over.

DATA SOURCE: Sample Adult Core component of the 1997-2001 National Health Interview Surveys.

square red bulletFor adults aged 50-64 years, the annual percent of persons who received influenza vaccine had decreased from 34.6% in 2000 to 32.2% in 2001. The decrease mainly was seen among women.

square red bulletFor adults aged 65 years and over, the annual percent of persons who received influenza vaccine continued to decline from 65.7% in 1999 to 64.3% in 2000 and 63.0% in 2001. This was due to the delay in influenza vaccine availability for the 2000-01 and 2001-02 seasons.

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This page last reviewed June 29, 2007

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U.S. DEPARTMENT OF HEALTH AND HUMAN SERVICES
Centers for Disease Control and Prevention
National Center for Health Statistics
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