National Health and Nutrition Examination Survey

2019-March 2020 Data Documentation, Codebook, and Frequencies

Functioning - Child (FNQC_K_R)

RDC Only Data File: FNQC_K_R.xpt

First Published: December 2021

Last Revised: NA

Due to disclosure issues, this dataset is not available publicly. Access may be obtained through the NCHS Research Data Center (https://www.cdc.gov/rdc).

Component Description

The NHANES program suspended field operations in March 2020 due to the coronavirus disease 2019 (COVID-19) pandemic. As a result, data collection for the NHANES 2019-2020 cycle was not completed. Data collected in 2019-March 2020 can be accessed as convenience samples through the NCHS Research Data Center (RDC). Any analyses based solely on the 2019-March 2020 data would not be generalizable to the U.S. civilian non-institutionalized population. Please refer to the Analytic Notes section for more details on the use of the data.

The Functioning Questionnaire (variable name prefix FNQ) section is part of the NHANES household interview and was newly added for the 2019-2020 survey cycle, replacing the Disability (DLQ) and Physical Functioning (PFQ) sections from the previous data collection cycles. In recent years, much of the science evolved regarding disability measurement, which warranted a new questionnaire section that would better capture information on functional difficulties in the U.S. population. This newly developed FNQ section included two sets of questions: 15 items collecting information for children 5 to 17 years, and 17 items focusing on adults 18 years and older. The present file (FNQC_K_R) contains functioning and disability data from children 5-17 years old. Adult FNQ data are available in a separate file, FNQA_K_R.

Questions included in the FNQ among children are based on a subset of items from the Washington Group/United Nations Children’s Fund (UNICEF) Child Functioning Module (Washington Group on Disability Statistics, 2020).

FNQ section topics include:

Current use of corrective lenses (i.e., glasses or contact lenses) or a hearing aid, and difficulty with vision and hearing (FNQ010 - FNQ040);
Difficulty with mobility such as walking for a short (100 m) or longer (500 m) distance, and the need to use equipment or assistance for walking (FNQ050 – FNQ090);
Difficulty with communicating, learning, and controlling behavior (FNQ100 – FNQ130); and
Emotional difficulties such as feeling worried, anxious, or nervous; and very sad or depressed (FNQ140– FNQ150).

Eligible Sample

All survey participants aged 5 and 17 years old in the NHANES 2019-March 2020 convenience sample were eligible.

Interview Setting and Mode of Administration

These questions were asked, in the home, by trained interviewers using the Computer-Assisted Personal Interview (CAPI) system.

An adult family member aged 18 years or older served as the proxy and provided information for child participants younger than 16 years old. Participants 16 years and older were interviewed directly.

The NHANES 2019-2020 FNQ is available on the NHANES website.

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. During the 2019-2020 data collection cycle, periodic QC checks were performed on the FNQ data being collected; and interviewer-specific feedback and retraining was performed as appropriate.

Data Processing and Editing

Questionnaire interview responses were entered into a tablet and then uploaded into a computerized database in the same manner as other sections of the Survey Participant Questionnaire. The data were then edited for completeness, consistency, and illogical values.

Analytic Notes

The COVID-19 pandemic required suspension of NHANES 2019-2020 field operations in March 2020 after data were collected in 18 of the 30 survey locations in the 2019-2020 sample. Data collection was cancelled for the remaining 12 locations. Calculation of survey weights for this partial cycle is not possible due to incomplete data collection. Therefore, data from survey components that were only collected in 2019-March 2020 are made available as convenience samples through NCHS's Research Data Center (RDC) because unbiased estimates for the NHANES target population cannot be produced with these samples.

For survey components conducted in both 2017-2018 and 2019-2020 cycles, data collected from 2019 to March 2020 were combined with data from 2017 to 2018 to form a nationally representative sample of NHANES 2017-March 2020 pre-pandemic data. Please see the NHANES 2017-March 2020 pre-pandemic data page for detailed information on this combined sample.

References

Washington Group on Disability Statistics. The Washington Group / UNICEF Child Functioning Module (CFM). (2020). Available from: https://www.washingtongroup-disability.com/fileadmin/uploads/wg/Documents/Washington_Group_Questionnaire__5_-_WG-UNICEF_Child_Functioning_Module__ages_5-17_.pdf

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 5 YEARS - 17 YEARS

FNQ010 - Do you wear glasses or contact lenses

Variable Name:: FNQ010
SAS Label:: Do you wear glasses or contact lenses
English Text:: I would like to ask you some questions about difficulties {you/SP} may have. {Do you/Does SP} wear glasses or contact lenses?
Target:: Both males and females 5 YEARS - 17 YEARS

Code or Value	Value Description	Count	Cumulative
1	Yes	487	487
2	No	1154	1641
7	Refused	0	1641
9	Don't know	0	1641
.	Missing	1	1642

FNQ020 - Difficultly seeing when wearing glasses

Variable Name:: FNQ020
SAS Label:: Difficultly seeing when wearing glasses
English Text:: {When wearing {your/his/her} glasses or contact lenses}, {do you/does SP} have difficulty seeing? Would you say {you have/SP has}: no difficulty, some difficulty, a lot of difficulty, or cannot do at all?
English Instructions:: HAND CARD FNQ1 CAPI INSTRUCTION: IF YES (CODE 1) IN FNQ.010, DISPLAY “When wearing {your/his/her} glasses or contact lenses”
Target:: Both males and females 5 YEARS - 17 YEARS

Code or Value	Value Description	Count	Cumulative
1	No difficulty	1406	1406
2	Some difficulty	218	1624
3	A lot of difficulty	15	1639
4	Cannot do at all	0	1639
7	Refused	0	1639
9	Don’t know	2	1641
.	Missing	1	1642

FNQ030 - Do you use a hearing aid?

Variable Name:: FNQ030
SAS Label:: Do you use a hearing aid?
English Text:: {Do you/Does SP} use a hearing aid?
Target:: Both males and females 5 YEARS - 17 YEARS

Code or Value	Value Description	Count	Cumulative
1	Yes	6	6
2	No	1635	1641
7	Refused	0	1641
9	Don’t know	0	1641
.	Missing	1	1642

FNQ040 - Difficultly hearing using hearing aid

Variable Name:: FNQ040
SAS Label:: Difficultly hearing using hearing aid
English Text:: {When using {your/his/her} hearing aid}, {do you/does SP} have difficulty hearing sounds like peoples’ voices or music? [Would you say {you have/SP has}: no difficulty, some difficulty, a lot of difficulty, or cannot do at all?]
English Instructions:: HAND CARD FNQ1 CAPI INSTRUCTION: IF YES (CODE 1) IN FNQ.030, DISPLAY “When using {your/his/her} hearing aid”
Target:: Both males and females 5 YEARS - 17 YEARS

Code or Value	Value Description	Count	Cumulative
1	No difficulty	1556	1556
2	Some difficulty	82	1638
3	A lot of difficulty	3	1641
4	Cannot do at all	0	1641
7	Refused	0	1641
9	Don’t know	0	1641
.	Missing	1	1642

FNQ050 - Use equip or assistance for walking

Variable Name:: FNQ050
SAS Label:: Use equip or assistance for walking
English Text:: {Do you/Does SP} use any equipment or receive assistance for walking?
Target:: Both males and females 5 YEARS - 17 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
1	Yes	9	9
2	No	1632	1641	FNQ080
7	Refused	0	1641	FNQ080
9	Don’t know	0	1641	FNQ080
.	Missing	1	1642

FNQ060 - Difficultly walking 100 yd w/o equip

Variable Name:: FNQ060
SAS Label:: Difficultly walking 100 yd w/o equip
English Text:: Without {your/his/her} equipment or assistance, {do you/does SP} have difficulty walking 100 yards/meters on level ground? That would be about the length of 1 football field. Would you say {you have/SP has}: some difficulty, a lot of difficulty, or cannot do at all?
English Instructions:: HAND CARD FNQ2
Target:: Both males and females 5 YEARS - 17 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
2	Some difficulty	5	5
3	A lot of difficulty	1	6	FNQ100
4	Cannot do at all	3	9	FNQ100
7	Refused	0	9
9	Don’t know	0	9
.	Missing	1633	1642

FNQ070 - Difficultly walking 500 yd w/o equip

Variable Name:: FNQ070
SAS Label:: Difficultly walking 500 yd w/o equip
English Text:: Without {your/his/her} equipment or assistance, {do you/does SP} have difficulty walking 500 yards/meters on level ground? That would be about the length of 5 football fields. [Would you say {you have/SP has}: some difficulty, a lot of difficulty, or cannot do at all?]
English Instructions:: HAND CARD FNQ2
Target:: Both males and females 5 YEARS - 17 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
2	Some difficulty	2	2	FNQ100
3	A lot of difficulty	3	5	FNQ100
4	Cannot do at all	0	5	FNQ100
7	Refused	0	5	FNQ100
9	Don’t know	0	5	FNQ100
.	Missing	1637	1642

FNQ080 - For age, is it difficult to walk100 yd

Variable Name:: FNQ080
SAS Label:: For age, is it difficult to walk100 yd
English Text:: Compared with children of the same age, {do you/does SP} have difficulty walking 100 yards/meters on level ground? That would be about the length of 1 football field. [Would you say {you have/SP has}: no difficulty, some difficulty, a lot of difficulty, or cannot do at all?]
English Instructions:: HAND CARD FNQ3
Target:: Both males and females 5 YEARS - 17 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
1	No difficulty	1557	1557
2	Some difficulty	69	1626
3	A lot of difficulty	4	1630	FNQ100
4	Cannot do at all	2	1632	FNQ100
7	Refused	0	1632
9	Don’t know	0	1632
.	Missing	10	1642

FNQ090 - For age, is it difficult to walk500 yd

Variable Name:: FNQ090
SAS Label:: For age, is it difficult to walk500 yd
English Text:: Compared with children of the same age, {do you/does SP} have difficulty walking 500 yards/meters on level ground? That would be about the length of 5 football fields. [Would you say {you have/SP has}: no difficulty, some difficulty, a lot of difficulty, or cannot do at all?]
English Instructions:: HAND CARD FNQ3
Target:: Both males and females 5 YEARS - 17 YEARS

Code or Value	Value Description	Count	Cumulative
1	No difficulty	1395	1395
2	Some difficulty	178	1573
3	A lot of difficulty	35	1608
4	Cannot do at all	3	1611
7	Refused	0	1611
9	Don’t know	15	1626
.	Missing	16	1642

FNQ100 - Diffculty being understood in HH

Variable Name:: FNQ100
SAS Label:: Diffculty being understood in HH
English Text:: When {you speak/SP speaks}, {do you/does he/does she} have difficulty being understood by people inside of this household? [Would you say {you have/SP has}: no difficulty, some difficulty, a lot of difficulty, or cannot do at all?]
English Instructions:: HAND CARD FNQ3
Target:: Both males and females 5 YEARS - 17 YEARS

Code or Value	Value Description	Count	Cumulative
1	No difficulty	1460	1460
2	Some difficulty	164	1624
3	A lot of difficulty	13	1637
4	Cannot do at all	4	1641
7	Refused	0	1641
9	Don't know	0	1641
.	Missing	1	1642

FNQ110 - Difficulty being understood out HH

Variable Name:: FNQ110
SAS Label:: Difficulty being understood out HH
English Text:: When {you speak/SP speaks}, {do you/does he/does she} have difficulty being understood by people outside of this household? [Would you say {you have/SP has}: no difficulty, some difficulty, a lot of difficulty, or cannot do at all?]
English Instructions:: HAND CARD FNQ3
Target:: Both males and females 5 YEARS - 17 YEARS

Code or Value	Value Description	Count	Cumulative
1	No difficulty	1391	1391
2	Some difficulty	216	1607
3	A lot of difficulty	29	1636
4	Cannot do at all	4	1640
7	Refused	0	1640
9	Don’t know	1	1641
.	Missing	1	1642

FNQ120 - For age, difficulty learning things

Variable Name:: FNQ120
SAS Label:: For age, difficulty learning things
English Text:: Compared with children of the same age, {do you/does SP} have difficulty learning things? [Would you say {you have/SP has}: no difficulty, some difficulty, a lot of difficulty, or cannot do at all?]
English Instructions:: HAND CARD FNQ3
Target:: Both males and females 5 YEARS - 17 YEARS

Code or Value	Value Description	Count	Cumulative
1	No difficulty	1331	1331
2	Some difficulty	261	1592
3	A lot of difficulty	49	1641
4	Cannot do at all	0	1641
7	Refused	0	1641
9	Don’t know	0	1641
.	Missing	1	1642

FNQ130 - For age, difficulty controlling behavior

Variable Name:: FNQ130
SAS Label:: For age, difficulty controlling behavior
English Text:: Compared with children of the same age, {do you/does SP} have difficulty controlling {your/his/her} behavior? [Would you say {you have/SP has}: no difficulty, some difficulty, a lot of difficulty, or cannot do at all?]
English Instructions:: HAND CARD FNQ3
Target:: Both males and females 5 YEARS - 17 YEARS

Code or Value	Value Description	Count	Cumulative
1	No difficulty	1216	1216
2	Some difficulty	325	1541
3	A lot of difficulty	95	1636
4	Cannot do at all	5	1641
7	Refused	0	1641
9	Don’t know	0	1641
.	Missing	1	1642

FNQ140 - How often feel anxious, nervous, worried

Variable Name:: FNQ140
SAS Label:: How often feel anxious, nervous, worried
English Text:: How often {do you feel/does SP seem} very anxious, nervous or worried? Would you say daily, weekly, monthly, a few times a year or never?
Target:: Both males and females 5 YEARS - 17 YEARS

Code or Value	Value Description	Count	Cumulative
1	Daily	159	159
2	Weekly	266	425
3	Monthly	182	607
4	A few times a year	475	1082
5	Never	558	1640
7	Refused	0	1640
9	Don't know	1	1641
.	Missing	1	1642

FNQ150 - How often feel very sad or depressed

Variable Name:: FNQ150
SAS Label:: How often feel very sad or depressed
English Text:: How often {do you feel/does SP seem} very sad or depressed? Would you say daily, weekly, monthly, a few times a year or never?
Target:: Both males and females 5 YEARS - 17 YEARS

Code or Value	Value Description	Count	Cumulative
1	Daily	42	42
2	Weekly	131	173
3	Monthly	157	330
4	A few times a year	482	812
5	Never	828	1640
7	Refused	0	1640
9	Don't know	1	1641
.	Missing	1	1642

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