DOI: 10.3886/icpsr03831.v1
title: National Immunization Survey (NIS), 2001
title: Version 1

description: This survey is part of a series that was designed to track
 the rates of proper vaccination of children in the United States. The
 target age range for the children was 19 to 35 months. Respondents were
 queried on the number of children present in the household between the
 ages of 12 months and 3 years, their dates of birth, their sex, whether
 there were vaccination records for the children, whether those records
 were accessible, whether the respondent was the adult in the household
 most knowledgeable about the vaccinations, and whether the respondent
 accompanied the children to more than 50 percent of their vaccinations.
 For each child in the household, information was gathered on whether
 each child had received all of the recommended vaccinations, and the
 number of the diphtheria-tetanus-pertussis shots (DTP or DT), polio
 vaccinations, measles vaccinations, meningitis or Haemophilus Influenzae
 type B (HIB) shots, varicella (chicken pox) vaccinations, rotavirus
 shots, pneumococcal shots, and hepatitis B (Hep B) shots each child had
 received. Further information was obtained about additional vaccinations
 the child may have received to combat diseases such as tuberculosis,
 typhoid, yellow fever, and malaria, the child's health care providers,
 the number of doctors that had performed vaccinations, and whether the
 measles vaccination was strictly for measles or for the
 measles-mumps-rubella (MMR) combination. Additional information was
 gathered regarding whether the child received benefits from the
 nutrition and health program for Woman, Infants, and Children (WIC),
 what age the child began receiving WIC benefits, whether the child's
 vaccination records were checked at the WIC certification visit, and
 whether these benefits had ever been interrupted for six months or more.
 Once parental consent was obtained, health care providers were queried
 on the vaccination records for each child whose vaccination information
 was gathered from parents. Health care providers were queried on the
 type and the level of detail of the vaccination records for each child,
 the dates and types of vaccinations administered, the date of each
 child's first visit to that provider regardless of reason, the date of
 the child's most recent visit to that provider regardless of reason, and
 the type of care the provider gave to the child. Health care provider
 respondents were asked to describe their facility, to give their
 position within the facility, the child's date of birth, according to
 their records, and whether the child was known by another last name, and
 to provide a list of any additional health care providers for that
 child. Demographic information provided by the parents or guardians
 includes the number of people living in the household, the number of
 people over and under 18 in the household, respectively, the number of
 children under the age of 12 months, ethnicity of respondent and child,
 marital status of the respondent, respondent's relationship to the
 child, respondent's educational level or that of the child's mother, the
 date of birth of the child's mother, household income, and whether the
child was living at the same address as when he or she was born.
description: The National Immunization Survey uses a random-digit-dialing
 (RDD) telephone survey to identify households containing children in the
 target age range and interview an adult who is knowledgeable about the
 child's vaccinations. With the consent of the child's parent or
 guardian, the National Immunization Survey also contacts (by mail) the
 child's health care providers to request information on vaccinations
 from the child's medical records. Samples of telephone numbers are drawn
 independently, for each calendar quarter, within 78 Immunization Action
 Plan (IAP) areas. Of the 78 IAP areas, 28 (including the District of
 Columbia) are urban areas. The remaining 50 are either an entire state
 or a "rest of state" IAP area (where the state contains one or more
 urban IAP areas). The target sample size in each IAP area is designed to
 achieve an approximately equal number of children with completed
telephone interviews in all 78 IAP areas.
description: Datasets: 
DS1: National Immunization Survey (NIS), 2001
description: The target population for the National Immunization Survey
 is children aged 19 to 35 months living in the United States at the time
of the interview.
description: (1) Any published material derived from these data
 should acknowledge the Centers for Disease Control (CDC), National
 Center for Health Statistics (NCHS), and the National Immunization
 Program (NIP) as the original data source and use "NIS" in the title or
 as a keyword in the abstract. (2) Per agreement with NCHS, ICPSR
 distributes the data file and technical documentation in this collection
 in their original form as prepared by NCHS. (3) The codebook is provided
 by ICPSR as a Portable Document Format (PDF) file. The PDF file format
 was developed by Adobe Systems Incorporated and can be accessed using
 PDF reader software, such as the Adobe Acrobat Reader. Information on
 how to obtain a copy of the Acrobat Reader is provided on the ICPSR Web
site.