National Health and Nutrition Examination Survey

2017-2018 Data Documentation, Codebook, and Frequencies

Kidney Conditions - Urology (KIQ_U_J)

Data File: KIQ_U_J.xpt

First Published: February 2020

Last Revised: NA

Component Description

The NHANES 2017-2018 Kidney Conditions – Urology File (variable name prefix KIQ_U) provides personal interview data on kidney disease, kidney stones, urinary incontinence, and nocturia.

Questions KIQ.005 “How often do you have urinary leakage? Would you say …” and KIQ.010 “How much urine do you lose each time? Would you say…” comprise the Incontinence Severity Index (Sandvik, 2000). This index, based on information about frequency in four levels and amount of leakage in three levels, can be multiplied to obtain an index value (1-12). The four-level severity index is based on the following index values: 1-2, slight; 3-6, moderate; 8-9, severe; 10-12, very severe.

Eligible Sample

All participants aged 20 years and older were eligible.

Interview Setting and Mode of Administration

Questions on kidney disease, dialysis, kidney stones, and passing a kidney stone (KIQ022, KIQ025, KIQ026, KID029) were asked in the home, by trained interviewers, using the Computer-Assisted Personal Interview (CAPI) system.

Questions on urinary incontinence (KIQ005, KIQ010, KIQ042, KIQ430, KIQ044, KIQ450, KIQ046, KIQ470, KIQ050, KIQ052) and nocturia (KIQ480) were asked at the Mobile Examination Center, by trained interviewers, using the CAPI system as part of the MEC interview. Both proxy interviewers and interpreters were permitted for these questions.

For details on the administration of the KIQ_U section, please refer to the NHANES 2017-2018 Interviewer Procedures Manual and the MEC Interviewer Procedures Manual 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.

Data Processing and Editing

Frequency counts were verified during the preparation of the file.

Analytic Notes

Missing data

Although KIQ005 – KIQ480 were targeted to all participants 20 years and older, data for these questions are missing for 12% of participants who completed the household interview but did not complete the MEC CAPI.

Appropriate sample weights

Interview weight: KIQ022- KIQ029
Examination weight: KIQ005-KIQ480

The interview weight should be used when an analysis uses data only from the household interview. If an analysis uses data from the MEC (MEC interview, examination, or laboratory data) exclusively, or in conjunction with the household interview data, the examination weight should be used.

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.

References

Sandvik H, Seim A, Vanvik A, Hunskaar S. A severity index for epidemiological surveys of female urinary incontinence: comparison with 48-hour pad-weighing tests. Neurourol Urodyn 2000; 19: 137-145.

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 20 YEARS - 150 YEARS

KIQ022 - Ever told you had weak/failing kidneys?

Variable Name:: KIQ022
SAS Label:: Ever told you had weak/failing kidneys?
English Text:: {Have you/Has SP} ever been told by a doctor or other health professional that {you/s/he} had weak or failing kidneys? Do not include kidney stones, bladder infections, or incontinence.
Target:: Both males and females 20 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
1	Yes	223	223
2	No	5337	5560	KIQ026
7	Refused	0	5560	KIQ026
9	Don't know	9	5569	KIQ026
.	Missing	0	5569

KIQ025 - Received dialysis in past 12 months?

Variable Name:: KIQ025
SAS Label:: Received dialysis in past 12 months?
English Text:: In the past 12 months, {have you/has SP} received dialysis (either hemodialysis or peritoneal dialysis)?
Target:: Both males and females 20 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
1	Yes	19	19
2	No	204	223
7	Refused	0	223
9	Don't know	0	223
.	Missing	5346	5569

KIQ026 - Ever had kidney stones?

Variable Name:: KIQ026
SAS Label:: Ever had kidney stones?
English Text:: {Have you/Has SP} ever had kidney stones?
Target:: Both males and females 20 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
1	Yes	554	554
2	No	5004	5558	KIQ005
7	Refused	0	5558	KIQ005
9	Don't know	11	5569	KIQ005
.	Missing	0	5569

KIQ029 - Pass kidney stone in past 12 months?

Variable Name:: KIQ029
SAS Label:: Pass kidney stone in past 12 months?
English Text:: In the past 12 months {have you/has SP} passed a kidney stone?
Target:: Both males and females 20 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
1	Yes	96	96
2	No	450	546
7	Refused	0	546
9	Don't know	8	554
.	Missing	5015	5569

KIQ005 - How often have urinary leakage?

Variable Name:: KIQ005
SAS Label:: How often have urinary leakage?
English Text:: Many people have leakage of urine. The next few questions ask about urine leakage. How often {do you/does SP} have urinary leakage? Would {you/s/he} say . . .
English Instructions:: CAPI INSTRUCTION: HELP SCREEN: Other terms for urinary leakage are not being able to hold your urine until you can reach a toilet, not being able to control your bladder, loss of urine control.
Target:: Both males and females 20 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
1	Never	3153	3153	KIQ042
2	Less than once a month	537	3690
3	A few times a month	497	4187
4	A few times a week	307	4494
5	Every day and/or night	373	4867
7	Refused	4	4871	KIQ042
9	Don't know	8	4879	KIQ042
.	Missing	690	5569

KIQ010 - How much urine lose each time?

Variable Name:: KIQ010
SAS Label:: How much urine lose each time?
English Text:: How much urine {do you/does SP} lose each time? Would {you/s/he} say . . .
Target:: Both males and females 20 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
1	Drops	1164	1164
2	Small splashes	366	1530
3	More	180	1710
7	Refused	2	1712
9	Don't know	2	1714
.	Missing	3855	5569

KIQ042 - Leak urine during physical activities?

Variable Name:: KIQ042
SAS Label:: Leak urine during physical activities?
English Text:: During the past 12 months, {have you/has SP} leaked or lost control of even a small amount of urine with an activity like coughing, lifting or exercise?
Target:: Both males and females 20 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
1	Yes	1211	1211
2	No	3655	4866	KIQ044
7	Refused	4	4870	KIQ044
9	Don't know	8	4878	KIQ044
.	Missing	691	5569

KIQ430 - How frequently does this occur?

Variable Name:: KIQ430
SAS Label:: How frequently does this occur?
English Text:: How frequently does this occur? Would {you/s/he} say this occurs . . .
Target:: Both males and females 20 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
1	Less than once a month	497	497
2	A few times a month	353	850
3	A few times a week	197	1047
4	Every day and/or night	160	1207
7	Refused	2	1209
9	Don't know	0	1209
.	Missing	4360	5569

KIQ044 - Urinated before reaching the toilet?

Variable Name:: KIQ044
SAS Label:: Urinated before reaching the toilet?
English Text:: During the past 12 months, {have you/has SP} leaked or lost control of even a small amount of urine with an urge or pressure to urinate and {you/he/she} couldn't get to the toilet fast enough?`
Target:: Both males and females 20 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
1	Yes	1315	1315
2	No	3549	4864	KIQ046
7	Refused	5	4869	KIQ046
9	Don't know	8	4877	KIQ046
.	Missing	692	5569

KIQ450 - How frequently does this occur?

Variable Name:: KIQ450
SAS Label:: How frequently does this occur?
English Text:: How frequently does this occur? Would {you/s/he} say this occurs. . .
Target:: Both males and females 20 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
1	Less than once a month	583	583
2	A few times a month	391	974
3	A few times a week	212	1186
4	Every day and/or night	127	1313
7	Refused	0	1313
9	Don't know	2	1315
.	Missing	4254	5569

KIQ046 - Leak urine during nonphysical activities

Variable Name:: KIQ046
SAS Label:: Leak urine during nonphysical activities
English Text:: During the past 12 months, {have you/has SP} leaked or lost control of even a small amount of urine without an activity like coughing, lifting, or exercise, or an urge to urinate?
Target:: Both males and females 20 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
1	Yes	476	476
2	No	4385	4861	KIQ048A
7	Refused	5	4866	KIQ048A
9	Don't know	10	4876	KIQ048A
.	Missing	693	5569

KIQ470 - How frequently does this occur?

Variable Name:: KIQ470
SAS Label:: How frequently does this occur?
English Text:: How frequently does this occur? Would {you/s/he} say this occurs . . .
Target:: Both males and females 20 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
1	Less than once a month	142	142
2	A few times a month	122	264
3	A few times a week	99	363
4	Every day and/or night	112	475
7	Refused	0	475
9	Don't know	1	476
.	Missing	5093	5569

KIQ048A - CHECK ITEM

Variable Name:: KIQ048A
English Instructions:: BOX 1. CHECK ITEM: IF 'YES' (CODE '1') IN KIQ042 OR KIQ044 OR KIQ046, CONTINUE WITH KIQ050. OTHERWISE, GO TO KIQ480.
Target:: Both males and females 20 YEARS - 150 YEARS

KIQ050 - How much did urine leakage bother you?

Variable Name:: KIQ050
SAS Label:: How much did urine leakage bother you?
English Text:: During the past 12 months, how much did {your/her/his} leakage of urine bother {you/her/him}? Please select one of the following choices:
Target:: Both males and females 20 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
1	Not at all	695	695
2	Only a little	656	1351
3	Somewhat	367	1718
4	Very much	164	1882
5	Greatly	148	2030
7	Refused	1	2031
9	Don't know	1	2032
.	Missing	3537	5569

KIQ052 - How much were daily activities affected?

Variable Name:: KIQ052
SAS Label:: How much were daily activities affected?
English Text:: During the past 12 months, how much did {your/her/his} leakage of urine affect {your/her/his} day-to-day activities? Please select one of the following choices:
Target:: Both males and females 20 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
1	Not at all	1404	1404
2	Only a little	357	1761
3	Somewhat	170	1931
4	Very much	64	1995
5	Greatly	35	2030
7	Refused	2	2032
9	Don't know	0	2032
.	Missing	3537	5569

KIQ480 - How many times urinate in night?

Variable Name:: KIQ480
SAS Label:: How many times urinate in night?
English Text:: During the past 30 days, how many times per night did {you/SP} most typically get up to urinate, from the time {you/s/he} went to bed at night until the time {you/he/she} got up in the morning. Would {you/s/he} say
Target:: Both males and females 20 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	0	1288	1288
1	1	1869	3157
2	2	941	4098
3	3	480	4578
4	4	155	4733
5	5 or more	133	4866
7	Refused	1	4867
9	Don't know	9	4876
.	Missing	693	5569

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