The medical conditions (variable name prefix MCQ) section provides self- and proxy-reported personal interview data on a broad range of health conditions and medical history for both children and adults.
The target sample for questions in this section varies by age and gender. Please review the questionnaire and codebook carefully.
This questionnaire was asked, in the home or by telephone, by trained interviewers, using the Computer-Assisted Personal Interview (CAPI) system.
The NHANES August 2021-August 2023 questionnaire is available on the NHANES website.
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. Interviewers were required to audio-record interviews. The recorded interviews were reviewed by interviewer supervisors and NCHS staff.
Frequency counts were checked, “skip” patterns were verified, and the reasonableness of question responses was reviewed. Edits were made to ensure the completeness, consistency, and analytic usefulness of the data. Edits were also made, when necessary, to address data disclosure concerns.
Several questions were dropped in NHANES 2021-2023 and are not included in this data file, including MCQ025, MCQ080, MCQ092, MCQ151, MCQ180B, MCQ520, MCQ530, MCQ540, MCQ570, MCQ206, MCQ300A, MCQ300B, MCQ300C, MCQ366A, MCQ366B, MCQ366C, MCQ366D, MCQ371A, MCQ371B, MCQ371C, MCQ371D, MCQ088, MCD093, RHD018, MCD180C, MCD180D, MCD180E, MCD180F, MCD180M, and MCD180L.
The analysis of NHANES August 2021–August 2023 MCQ data must be conducted using the appropriate survey design variables, sample weights, and the basic demographic variables. 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 the analyses.
Please refer to the NHANES Analytic Guidelines and the online NHANES Tutorial for further details on the use of sample weights and other analytic issues.
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 1946 | 1946 | |
2 | No | 9782 | 11728 | AGQ030 |
7 | Refused | 0 | 11728 | AGQ030 |
9 | Don't know | 15 | 11743 | AGQ030 |
. | Missing | 1 | 11744 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 1219 | 1219 | |
2 | No | 690 | 1909 | AGQ030 |
7 | Refused | 0 | 1909 | AGQ030 |
9 | Don't know | 37 | 1946 | AGQ030 |
. | Missing | 9798 | 11744 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 591 | 591 | |
2 | No | 624 | 1215 | |
7 | Refused | 0 | 1215 | |
9 | Don't know | 4 | 1219 | |
. | Missing | 10525 | 11744 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 161 | 161 | |
2 | No | 1056 | 1217 | |
7 | Refused | 0 | 1217 | |
9 | Don't know | 2 | 1219 | |
. | Missing | 10525 | 11744 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 2067 | 2067 | |
2 | No | 9665 | 11732 | |
7 | Refused | 0 | 11732 | |
9 | Don't know | 11 | 11743 | |
. | Missing | 1 | 11744 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 433 | 433 | |
2 | No | 11300 | 11733 | |
7 | Refused | 1 | 11734 | |
9 | Don't know | 7 | 11741 | |
. | Missing | 3 | 11744 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 64 | 64 | |
2 | No | 368 | 432 | MCQ220 |
7 | Refused | 0 | 432 | MCQ220 |
9 | Don't know | 2 | 434 | MCQ220 |
. | Missing | 11310 | 11744 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 2532 | 2532 | |
2 | No | 5258 | 7790 | MCQ160B |
7 | Refused | 0 | 7790 | MCQ160B |
9 | Don't know | 17 | 7807 | MCQ160B |
. | Missing | 3937 | 11744 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Osteoarthritis or degenerative arthritis | 1297 | 1297 | |
2 | Rheumatoid arthritis | 419 | 1716 | |
3 | Psoriatic arthritis | 61 | 1777 | |
4 | Other | 254 | 2031 | |
7 | Refused | 5 | 2036 | |
9 | Don't know | 496 | 2532 | |
. | Missing | 9212 | 11744 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 343 | 343 | |
2 | No | 7448 | 7791 | |
7 | Refused | 0 | 7791 | |
9 | Don't know | 17 | 7808 | |
. | Missing | 3936 | 11744 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 402 | 402 | |
2 | No | 7371 | 7773 | |
7 | Refused | 0 | 7773 | |
9 | Don't know | 34 | 7807 | |
. | Missing | 3937 | 11744 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 181 | 181 | |
2 | No | 7602 | 7783 | |
7 | Refused | 0 | 7783 | |
9 | Don't know | 25 | 7808 | |
. | Missing | 3936 | 11744 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 332 | 332 | |
2 | No | 7462 | 7794 | |
7 | Refused | 0 | 7794 | |
9 | Don't know | 13 | 7807 | |
. | Missing | 3937 | 11744 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 367 | 367 | |
2 | No | 7418 | 7785 | |
7 | Refused | 0 | 7785 | |
9 | Don't know | 21 | 7806 | |
. | Missing | 3938 | 11744 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 1053 | 1053 | |
2 | No | 6734 | 7787 | MCQ160P |
7 | Refused | 1 | 7788 | MCQ160P |
9 | Don't know | 18 | 7806 | MCQ160P |
. | Missing | 3938 | 11744 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 830 | 830 | |
2 | No | 200 | 1030 | |
7 | Refused | 0 | 1030 | |
9 | Don't know | 23 | 1053 | |
. | Missing | 10691 | 11744 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 567 | 567 | |
2 | No | 7226 | 7793 | |
7 | Refused | 0 | 7793 | |
9 | Don't know | 14 | 7807 | |
. | Missing | 3937 | 11744 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 425 | 425 | |
2 | No | 7369 | 7794 | |
7 | Refused | 2 | 7796 | |
9 | Don't know | 11 | 7807 | |
. | Missing | 3937 | 11744 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 243 | 243 | |
2 | No | 127 | 370 | |
7 | Refused | 1 | 371 | |
9 | Don't know | 54 | 425 | |
. | Missing | 11319 | 11744 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 15 | 15 | |
2 | No | 1562 | 1577 | MCQ515 |
7 | Refused | 0 | 1577 | MCQ515 |
9 | Don't know | 1 | 1578 | MCQ515 |
. | Missing | 10166 | 11744 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Fatty liver | 227 | 227 | |
77 | Refused | 2 | 229 | MCQ515 |
99 | Don't know | 31 | 260 | MCQ515 |
. | Missing | 11484 | 11744 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
2 | Liver fibrosis | 4 | 4 | |
. | Missing | 11740 | 11744 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
3 | Liver cirrhosis | 47 | 47 | |
. | Missing | 11697 | 11744 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
4 | Viral hepatitis | 62 | 62 | |
. | Missing | 11682 | 11744 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
5 | Autoimmune hepatitis | 16 | 16 | |
. | Missing | 11728 | 11744 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
6 | Other liver disease | 79 | 79 | |
. | Missing | 11665 | 11744 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 864 | 864 | |
2 | No | 6924 | 7788 | |
7 | Refused | 1 | 7789 | |
9 | Don't know | 18 | 7807 | |
. | Missing | 3937 | 11744 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 926 | 926 | |
2 | No | 6874 | 7800 | |
7 | Refused | 0 | 7800 | |
9 | Don't know | 7 | 7807 | |
. | Missing | 3937 | 11744 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 1169 | 1169 | |
2 | No | 6631 | 7800 | OSQ230 |
7 | Refused | 2 | 7802 | OSQ230 |
9 | Don't know | 5 | 7807 | OSQ230 |
. | Missing | 3937 | 11744 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
10 | Bladder | 30 | 30 | |
11 | Blood | 7 | 37 | |
12 | Bone | 4 | 41 | |
13 | Brain | 6 | 47 | |
14 | Breast | 203 | 250 | |
15 | Cervix (cervical) | 49 | 299 | |
16 | Colon | 49 | 348 | |
17 | Esophagus (esophageal) | 5 | 353 | |
18 | Gallbladder | 0 | 353 | |
19 | Kidney | 27 | 380 | |
20 | Larynx/ windpipe | 3 | 383 | |
21 | Leukemia | 22 | 405 | |
22 | Liver | 7 | 412 | |
23 | Lung | 34 | 446 | |
24 | Lymphoma/ Hodgkin's disease | 24 | 470 | |
25 | Melanoma | 81 | 551 | |
26 | Mouth/tongue/lip | 10 | 561 | |
27 | Nervous system | 0 | 561 | |
28 | Ovary (ovarian) | 14 | 575 | |
29 | Pancreas (pancreatic) | 4 | 579 | |
30 | Prostate | 133 | 712 | |
31 | Rectum (rectal) | 5 | 717 | |
32 | Skin (non-melanoma) | 203 | 920 | |
33 | Skin (don't know what kind) | 71 | 991 | |
34 | Soft tissue (muscle or fat) | 3 | 994 | |
35 | Stomach | 6 | 1000 | |
36 | Testis (testicular) | 10 | 1010 | |
37 | Thyroid | 35 | 1045 | |
38 | Uterus (uterine) | 36 | 1081 | |
39 | Other | 76 | 1157 | |
66 | More than 3 kinds | 0 | 1157 | |
77 | Refused | 0 | 1157 | |
99 | Don't know | 12 | 1169 | |
. | Missing | 10575 | 11744 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
10 | Bladder | 3 | 3 | |
11 | Blood | 0 | 3 | |
12 | Bone | 1 | 4 | |
13 | Brain | 0 | 4 | |
14 | Breast | 12 | 16 | |
15 | Cervix (cervical) | 5 | 21 | |
16 | Colon | 9 | 30 | |
17 | Esophagus (esophageal) | 0 | 30 | |
18 | Gallbladder | 1 | 31 | |
19 | Kidney | 6 | 37 | |
20 | Larynx/ windpipe | 1 | 38 | |
21 | Leukemia | 1 | 39 | |
22 | Liver | 0 | 39 | |
23 | Lung | 6 | 45 | |
24 | Lymphoma/ Hodgkins disease | 3 | 48 | |
25 | Melanoma | 7 | 55 | |
26 | Mouth/tongue/lip | 0 | 55 | |
27 | Nervous system | 0 | 55 | |
28 | Ovary (ovarian) | 3 | 58 | |
29 | Pancreas (pancreatic) | 0 | 58 | |
30 | Prostate | 8 | 66 | |
31 | Rectum (rectal) | 3 | 69 | |
32 | Skin (non-melanoma) | 34 | 103 | |
33 | Skin (don't know what kind) | 16 | 119 | |
34 | Soft tissue (muscle or fat) | 0 | 119 | |
35 | Stomach | 3 | 122 | |
36 | Testis (testicular) | 1 | 123 | |
37 | Thyroid | 2 | 125 | |
38 | Uterus (uterine) | 5 | 130 | |
39 | Other | 29 | 159 | |
66 | More than 3 kinds | 0 | 159 | |
77 | Refused | 0 | 159 | |
99 | Don't know | 0 | 159 | |
. | Missing | 11585 | 11744 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
10 | Bladder | 0 | 0 | |
11 | Blood | 0 | 0 | |
12 | Bone | 0 | 0 | |
13 | Brain | 1 | 1 | |
14 | Breast | 0 | 1 | |
15 | Cervix (cervical) | 1 | 2 | |
16 | Colon | 1 | 3 | |
17 | Esophagus (esophageal) | 0 | 3 | |
18 | Gallbladder | 0 | 3 | |
19 | Kidney | 0 | 3 | |
20 | Larynx/ windpipe | 0 | 3 | |
21 | Leukemia | 1 | 4 | |
22 | Liver | 1 | 5 | |
23 | Lung | 2 | 7 | |
24 | Lymphoma/ Hodgkins disease | 1 | 8 | |
25 | Melanoma | 3 | 11 | |
26 | Mouth/tongue/lip | 0 | 11 | |
27 | Nervous system | 0 | 11 | |
28 | Ovary (ovarian) | 2 | 13 | |
29 | Pancreas (pancreatic) | 0 | 13 | |
30 | Prostate | 2 | 15 | |
31 | Rectum (rectal) | 0 | 15 | |
32 | Skin (non-melanoma) | 3 | 18 | |
33 | Skin (don't know what kind) | 3 | 21 | |
34 | Soft tissue (muscle or fat) | 0 | 21 | |
35 | Stomach | 1 | 22 | |
36 | Testis (testicular) | 0 | 22 | |
37 | Thyroid | 0 | 22 | |
38 | Uterus (uterine) | 0 | 22 | |
39 | Other | 4 | 26 | |
66 | More than 3 kinds | 0 | 26 | |
77 | Refused | 0 | 26 | |
99 | Don't know | 0 | 26 | |
. | Missing | 11718 | 11744 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
66 | More than 3 kinds | 2 | 2 | |
77 | Refused | 0 | 2 | |
99 | Don't know | 0 | 2 | |
. | Missing | 11742 | 11744 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 1917 | 1917 | |
2 | No | 3770 | 5687 | |
7 | Refused | 0 | 5687 | |
9 | Don't know | 36 | 5723 | |
. | Missing | 6021 | 11744 |