Table of Contents

Component Description

The Immunization section (variable name prefix IMQ) provides survey participant interview 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

All survey participants 2 years of age and older are asked about the hepatitis A vaccination; all survey participants’ are asked about the hepatitis B vaccination; and all survey participants’ ages 9-59 are asked about the HPV vaccination.

Interview Setting and Mode of Administration

These questions were asked, in the home, by trained interviewers using the Computer-Assisted Personal Interviewing (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.

The Interviewer Procedure Manuals and Survey Questionnaires and Exam Manuals can be found on the NHANES website at https://wwwn.cdc.gov/nchs/data/nhanes/2013-2014/questionnaires/imq_h.pdf.

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

Participants’ questionnaire interview responses were entered into a laptop computer and then uploaded to the NHANES computerized database in the same manner as other sections of the Sample Person Questionnaire. The data were edited for completeness, consistency, and illogical values.

Analytic Notes

The IMQ questionnaire data was collected on a full sample of respondents and can be analyzed in conjunction with results from MEC laboratory data. Analysts should review all NHANES hepatitis and HPV laboratory data release documentation and statistical and analytic guidelines prior to beginning data analysis.

Question IMQ011 in NHANES 2005-2006, 2007-2008, 2009-2010, 2011-2012 and 2013-2014 is comparable to question IMD010 in NHANES 2003-2004, and question IMQ010 in NHANES 2001-2002 and NHANES 1999-2000.

Although these data were collected as part of the household questionnaire, if they are merged with the MEC exam data, exam sample weights should be used for 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 4238 4238
2 Less than 2 doses 194 4432
3 No doses 3943 8375
7 Refused 6 8381
9 Don't know 1126 9507
. Missing 668 10175

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 5230 5230
2 Less than 3 doses 453 5683
3 No doses 3517 9200
7 Refused 7 9207
9 Don't know 968 10175
. Missing 0 10175

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

IMQ040 - Received HPV vaccine

Variable Name:
IMQ040
SAS Label:
Received HPV vaccine
English Text:
Human Papillomavirus (HPV) vaccine is given to prevent cervical cancer in girls and women. There are two HPV vaccines available called Cervarix and Gardasil. 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 600 600 IMQ080
2 No 2363 2963
7 Refused 0 2963
9 Don't know 125 3088
. Missing 7087 10175

IMQ070 - Received HPV vaccine

Variable Name:
IMQ070
SAS Label:
Received HPV vaccine
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 277 277 IMQ090
2 No 2442 2719
7 Refused 0 2719
9 Don't know 207 2926
. Missing 7249 10175

IMQ080 - HPV vaccine received

Variable Name:
IMQ080
SAS Label:
HPV vaccine received
English Text:
Which of the HPV vaccines did {you/SP} receive, Cervarix or Gardasil?
Target:
Females only 9 YEARS - 59 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Cervarix 41 41
2 Gardasil 338 379
3 Both 44 423
7 Refused 0 423
9 Don't know 177 600
. Missing 9575 10175

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/the vaccine}?
English Instructions:
HARD EDIT: IF AGE SP RECEIVED FIRST DOSE IS GREATER THAN SP'S CURRENT AGE, DISPLAY "AGE SP RECEIVED FIRST DOSE CANNOT EXCEED SP'S CURRENT AGE." SOFT EDIT: IF DIFFERENCE BETWEEN SP'S CURRENT AGE AND AGE SP RECEIVED FIRST DOSE IS MORE THAN SEVEN YEARS, DISPLAY "UNLIKELY RESPONSE AS HPV VACCINES WERE NOT AVAILABLE AT THAT TIME. PLEASE CONFIRM AGE SP RECEIVED FIRST DOSE." ENTER AGE IN YEARS. CAPI INSTRUCTION: IF SP = MALE, THEN FILL GARDASIL. IF IMQ.080 = 1, DISPLAY "Cervarix"; ELSE IF IMQ.080 = 2, DISPLAY "Gardasil"; ELSE DISPLAY "the vaccine".
Target:
Both males and females 9 YEARS - 59 YEARS
Code or Value Value Description Count Cumulative Skip to Item
5 to 54 Range of Values 796 796
777 Refused 1 797
999 Don't know 80 877
. Missing 9298 10175

IMQ045 - Received HPV, # of doses

Variable Name:
IMQ045
SAS Label:
Received HPV, # of doses
English Text:
How many doses of {Cervarix/Gardasil/the vaccine} {have you/has SP} received?
English Instructions:
CAPI INSTRUCTION: IF SP = MALE, THEN FILL GARDASIL. IF IMQ.080 = 1, DISPLAY "Cervarix"; ELSE IF IMQ.080 = 2, DISPLAY "Gardasil"; ELSE DISPLAY "the vaccine".
Target:
Both males and females 9 YEARS - 59 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 1 Dose 180 180
2 2 Doses 162 342
3 3 Doses 481 823
7 Refused 0 823
9 Don't know 54 877
. Missing 9298 10175