Table of Contents

Component Description

The Immunization section (variable name prefix IMQ) provides respondent-level data on immunizations, including the hepatitis A vaccine, the hepatitis B vaccine, and the human papillomavirus (HPV) vaccine. The number of doses received is also obtained since all vaccines are multi-dose.

Eligible Sample

Participants aged 2 years and older were asked about the hepatitis A vaccination; all participants were asked about the hepatitis B vaccination; and participants 9 to 59 years of age were asked about the HPV vaccination.

Interview Setting and Mode of Administration

IMQ was asked in the home, by trained interviewers, using the Computer-Assisted Personal Interview (CAPI) system.

Persons 16 years of age and older and emancipated minors were interviewed directly. A proxy provided information for survey participants who were under 16 years of age and for participants who could not answer the questions themselves.

Quality Assurance & Quality Control

The CAPI system is programmed with built-in consistency checks to reduce data entry errors. CAPI also uses online help screens to assist interviewers in defining key terms used in the questionnaire.

Data Processing and Editing

The data were reviewed for completeness, consistency, and illogical values.

Analytic Notes

Although these data were collected as part of the household questionnaire, if they are merged with the exam data, exam sample weights should be used for the analyses.

Please refer to the NHANES Analytic Guidelines and the on-line NHANES Tutorial for further details on the use of sample weights and other analytic issues.

Codebook and Frequencies

SEQN - Respondent sequence number

Variable Name:
SEQN
SAS Label:
Respondent sequence number
English Text:
Respondent sequence number.
Target:
Both males and females 0 YEARS - 150 YEARS

IMQ011 - Received Hepatitis A vaccine

Variable Name:
IMQ011
SAS Label:
Received Hepatitis A vaccine
English Text:
Hepatitis (Hep-a-ti-tis) A vaccine is given as a two dose series to some children older than 2 years and also to some adults, especially people who travel outside the United States. It has only been available since 1995. {Have you/Has SP} ever received hepatitis A vaccine?
English Instructions:
INTERVIEWER INSTRUCTION: A COMBINATION HEPATITIS A AND HEPATITIS B VACCINE SHOULD BE COUNTED AS THE A VACCINE FOR THE PURPOSE OF THIS QUESTION. CODE 'YES AT LEAST 2 DOSES' IF RESPONDENT ANSWERS 3 OR 4 DOSES WERE RECEIVED. CODE 'LESS THAN 2 DOSES' ONLY IF MENTIONED BY RESPONDENT.
Target:
Both males and females 2 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes, at least 2 doses 2944 2944
2 Less than 2 doses 312 3256
3 No doses 3951 7207
7 Refused 12 7219
9 Don't know 1444 8663
. Missing 591 9254

IMQ020 - Received Hepatitis B 3 dose series

Variable Name:
IMQ020
SAS Label:
Received Hepatitis B 3 dose series
English Text:
Hepatitis (Hep-a-ti-tis) B vaccine is given in three separate doses and has been recommended for all newborn infants since 1991. In 1995, it was recommended that adolescents be given the vaccine. Persons who may be exposed to other people's blood, such as health care workers, also may have received the vaccine. {Have you/Has SP} ever received the 3-dose series of the hepatitis B vaccine?
English Instructions:
INTERVIEWER INSTRUCTION: A COMBINATION HEPATITIS A AND HEPATITIS B VACCINE SHOULD BE COUNTED AS THE B VACCINE FOR THE PURPOSE OF THIS QUESTION. CODE 'YES AT LEAST 3 DOSES' IF RESPONDENT ANSWERS 4 DOSES WERE RECEIVED. CODE 'LESS THAN 3 DOSES' ONLY IF MENTIONED BY RESPONDENT.
Target:
Both males and females 0 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes at least 3 doses 3891 3891
2 Less than 3 doses 513 4404
3 No doses 3705 8109
7 Refused 6 8115
9 Don't know 1139 9254
. Missing 0 9254

IMQ050 - CHECK ITEM

Variable Name:
IMQ050
English Instructions:
CHECK ITEM. IF SP = FEMALE AND AGE IS >= 9 AND <= 59, CONTINUE. IF SP = MALE AND AGE IS >= 9 AND <= 59, GO TO IMQ070. OTHERWISE, GO TO END OF SECTION.
Target:
Both males and females 0 YEARS - 150 YEARS

IMQ060 - Received HPV vaccine (Females)

Variable Name:
IMQ060
SAS Label:
Received HPV vaccine (Females)
English Text:
Human Papillomavirus (HPV) vaccine is given to prevent cervical cancer in girls and women. The HPV vaccines available are called Cervarix, Gardasil or Gardasil 9. It is given in 3 separate doses over a 6 month period. {Have you/Has SP} ever received one or more doses of the HPV vaccine?
Target:
Females only 9 YEARS - 59 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes 582 582 IMQ081A
2 No 1934 2516 End of Section
7 Refused 0 2516 End of Section
9 Don't know 192 2708 End of Section
. Missing 6546 9254

IMQ070 - Received HPV vaccine (Males)

Variable Name:
IMQ070
SAS Label:
Received HPV vaccine (Males)
English Text:
Human Papillomavirus (HPV) vaccine is given to prevent HPV infection and genital warts in boys and men. It is given in 3 separate doses over a 6 month period. {Have you/Has SP} ever received one or more doses of the HPV vaccine? (The brand name for the vaccine is Gardasil.)
Target:
Males only 9 YEARS - 59 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes 348 348 IMQ090
2 No 1866 2214
7 Refused 1 2215
9 Don't know 276 2491
. Missing 6763 9254

IMQ081A - Received Cervarix (Females)?

Variable Name:
IMQ081A
SAS Label:
Received Cervarix (Females)?
English Text:
Which of the HPV vaccines did {you/SP} receive, Cervarix, Gardasil or Gardasil 9?
English Instructions:
INTERVIEWER: CODE ALL THAT APPLY.
Target:
Females only 9 YEARS - 59 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 CERVARIX 50 50
7 Refused 2 52
9 Don't know 186 238
. Missing 9016 9254

IMQ081B - Received Gardasil (Females)?

Variable Name:
IMQ081B
SAS Label:
Received Gardasil (Females)?
English Text:
Which of the HPV vaccines did {you/SP} receive, Cervarix, Gardasil or Gardasil 9?
English Instructions:
INTERVIEWER: CODE ALL THAT APPLY.
Target:
Females only 9 YEARS - 59 YEARS
Code or Value Value Description Count Cumulative Skip to Item
2 GARDASIL 199 199
. Missing 9055 9254

IMQ081C - Received Gardasil 9 (Females)?

Variable Name:
IMQ081C
SAS Label:
Received Gardasil 9 (Females)?
English Text:
Which of the HPV vaccines did {you/SP} receive, Cervarix, Gardasil or Gardasil 9?
English Instructions:
INTERVIEWER: CODE ALL THAT APPLY.
Target:
Females only 9 YEARS - 59 YEARS
Code or Value Value Description Count Cumulative Skip to Item
3 GARDASIL 9 22 22
. Missing 9232 9254

IMQ081D - Received Unknown Gardasil (Females)?

Variable Name:
IMQ081D
SAS Label:
Received Unknown Gardasil (Females)?
English Text:
Which of the HPV vaccines did {you/SP} receive, Cervarix, Gardasil or Gardasil 9?
English Instructions:
INTERVIEWER: CODE ALL THAT APPLY.
Target:
Females only 9 YEARS - 59 YEARS
Code or Value Value Description Count Cumulative Skip to Item
4 GARDASIL (not sure wich one) 127 127
. Missing 9127 9254

IMQ090 - Age first dose HPV

Variable Name:
IMQ090
SAS Label:
Age first dose HPV
English Text:
How old {were you/was SP} when {you/SP} received your first dose of {Cervarix/Gardasil/Gardasil 9/Gardasil or Gardasil 9/the vaccine}?
Target:
Both males and females 9 YEARS - 59 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 to 57 Range of Values 751 751
777 Refused 1 752
999 Don't know 178 930
. Missing 8324 9254

IMQ100 - Received HPV, # of doses

Variable Name:
IMQ100
SAS Label:
Received HPV, # of doses
English Text:
How many doses of {Cervarix/Gardasil/Gardasil or Gardasil 9/the vaccine} {have you/has SP} received?
Target:
Both males and females 9 YEARS - 59 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 1 Dose 225 225
2 2 Doses 218 443
3 3 Doses 374 817
7 Refused 0 817
9 Don't know 113 930
. Missing 8324 9254