Statistics and Surveillance:

Technical Notes for
NIS-Teen Vaccination Coverage Tables

Adolescents in the survey period...	were born between
January 2011 – February 2012	January 1993 - February 1999
January 2010 - February 2011	January 1992 - February 1998
January 2009 - February 2010	January 1991 - February 1997
January 2008 - February 2009	January 1990 - February 1996
October 2007 - February 2008	October 1989 - February 1995
October 2006 - February 2007	October 1988 - February 1994

1. >1 Td or Tdap refers to 1 or more doses of tetanus toxoid-diptheria vaccine (Td) or tetanus toxoid, reduced diphtheria toxoid, and acellular pertussis (Tdap) since the age of ten years.



2. >1 Tdap refers to 1 or more doses of tetanus toxoid, reduced diphtheria toxoid, and acellular pertussis (Tdap) since the age of ten years.



3. >1 MenACWY refers to 1 or more doses of the meningococcal conjugate vaccine (MenACWY) and meningococcal-unknown type vaccine.



4. >1 HPV refers to 1 or more doses of the quadrivalent or bivalent human papillomavirus vaccine. HPV coverage estimates are reported among females.



5. >3 HPV refers to 3 or more doses of the quadrivalent or bivalent human papillomavirus vaccine. HPV coverage estimates are reported among females.



6. HPV 3 dose series completion refers to the percent of females who received three doses among those who had at least one HPV dose and at least 24 weeks between the first dose and the interview date.



7. >2 MMR refers to 2 or more doses of measles-mumps-rubella vaccine.



8. >3 HepB refers to 3 or more doses of hepatitis B vaccine.



9. >1 VAR refers to 1 or more doses of varicella vaccine.



10. >2 VAR refers to 2 or more doses of varicella vaccine.



11. Vaccination coverage estimates are presented as a point estimate (%) with a 95% confidence interval (95% CI). Confidence intervals around the coverage estimates are measures of precision; wide confidence intervals are a sign of a relatively small sample size and relatively less precision. By definition, approximately 5% of the 95% confidence intervals (or about 3 states) will fail to contain the true coverage, that is, the true rate will fall outside of the interval. Exactly how many and which confidence intervals in any given year will fail to contain the true vaccination coverage are unknown and unknowable, but could be as few as 0 or as many as 5. Consequently, looking at an area's data over time is also valuable to a correct understanding of apparent changes in coverage. Where confidence intervals overlap, the observed difference might be due to chance.



12. Cells indicating that estimate=NA (Not Available) reflect coverage estimates that do not meet the NCHS standard of reliability or precision: if the unweighted sample size for the numerator was less than 30 or (CI half width)/Estimate greater than 0.6. In these cases the estimate for that subgroup is not reported, but the individuals are still included in the overall sample and may have an effect on the overall estimate. State estimates with (CI half width) greater than 10 may be unreliable, but are reported and marked by a footnote.



13. Race was self-reported by the respondent. Hispanic adolescents can be of any race. Native Hawaiian or other Pacific Islanders and persons of multiple races were not included because of small sample sizes.



14. An area's vaccination coverage estimate is based on the provider-verified responses from adolescents who live in households with telephones. Complex statistical methods are used to adjust for adolescents whose parents refuse to participate, those who live in households without telephones, or those whose immunization histories cannot be verified through their providers.

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