National Health and Nutrition Examination Survey

2015-2016 Data Documentation, Codebook, and Frequencies

Kidney Conditions - Urology (KIQ_U_I)

Data File: KIQ_U_I.xpt

First Published: December 2018

Last Revised: NA

Component Description

The NHANES 2015-2016 Kidney Conditions – Urology File (variable name prefix KIQ_U) provides personal interview data on kidney disease, kidney stones, urinary incontinence, and nocturia.

Questions KIQ005 “How often do you have urinary leakage? Would you say …” and KIQ010 “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, KIQ029) were asked in the home, by trained interviewers, using the Computer-Assisted Personal Interview (CAPI) system. KID028, which considered ever having kidney stones has been discontinued. A new question KIQ029, which considers kidney stones in the past 12 months has been added.

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 2015-2016 Interviewer Procedures Manual and the MEC Interviewers 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 13% of individuals who completed the household interview, but did not complete the MEC CAPI.

Appropriate sample weights

Interview weight: KIQ022- KIQ028
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	239	239
2	No	5472	5711	KIQ026
7	Refused	0	5711	KIQ026
9	Don't know	8	5719	KIQ026
.	Missing	0	5719

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	20	20
2	No	218	238
7	Refused	0	238
9	Don't know	1	239
.	Missing	5480	5719

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	606	606
2	No	5099	5705	KIQ005
7	Refused	0	5705	KIQ005
9	Don't know	14	5719	KIQ005
.	Missing	0	5719

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	88	88
2	No	517	605
7	Refused	0	605
9	Don't know	1	606
.	Missing	5113	5719

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	3400	3400	KIQ042
2	Less than once a month	465	3865
3	A few times a month	488	4353
4	A few times a week	293	4646
5	Every day and/or night	298	4944
7	Refused	1	4945	KIQ042
9	Don't know	6	4951	KIQ042
.	Missing	768	5719

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	1092	1092
2	Small splashes	281	1373
3	More	167	1540
7	Refused	0	1540
9	Don't know	4	1544
.	Missing	4175	5719

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	1134	1134
2	No	3808	4942	KIQ044
7	Refused	0	4942	KIQ044
9	Don't know	9	4951	KIQ044
.	Missing	768	5719

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	474	474
2	A few times a month	352	826
3	A few times a week	184	1010
4	Every day and/or night	121	1131
7	Refused	0	1131
9	Don't know	3	1134
.	Missing	4585	5719

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	1183	1183
2	No	3762	4945	KIQ046
7	Refused	0	4945	KIQ046
9	Don't know	6	4951	KIQ046
.	Missing	768	5719

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	506	506
2	A few times a month	366	872
3	A few times a week	194	1066
4	Every day and/or night	115	1181
7	Refused	0	1181
9	Don't know	2	1183
.	Missing	4536	5719

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	479	479
2	No	4463	4942	KIQ048A
7	Refused	1	4943	KIQ048A
9	Don't know	8	4951	KIQ048A
.	Missing	768	5719

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	135	135
2	A few times a month	136	271
3	A few times a week	97	368
4	Every day and/or night	109	477
7	Refused	0	477
9	Don't know	2	479
.	Missing	5240	5719

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	661	661
2	Only a little	674	1335
3	Somewhat	262	1597
4	Very much	183	1780
5	Greatly	88	1868
7	Refused	2	1870
9	Don't know	2	1872
.	Missing	3847	5719

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	1254	1254
2	Only a little	372	1626
3	Somewhat	157	1783
4	Very much	59	1842
5	Greatly	26	1868
7	Refused	2	1870
9	Don't know	2	1872
.	Missing	3847	5719

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	1407	1407
1	1	1850	3257
2	2	928	4185
3	3	486	4671
4	4	165	4836
5	5 or more	108	4944
7	Refused	2	4946
9	Don't know	5	4951
.	Missing	768	5719

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