The reproductive health section (variable name prefix RHQ) contains questions for females only. Questions on reproductive health include menstrual history, pregnancy history, hormone replacement therapy use, and other related reproductive conditions. A question used to calculate estimated time in months at menarche for youth 12-19 was added in 2017-2018.
Female participants aged 12 years and older were eligible.
These questions were asked at the mobile examination center (MEC), by trained interviewers, using the Computer-Assisted Personal Interview (CAPI) system as part of the MEC interview. Both proxy interviewers and interpreters were permitted for these questions.
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.
Edits were made to ensure the completeness, consistency and analytic usefulness of the data.
This is the complete data file containing all variables for females 12 years and older. Select variables related to pregnancy and hysterectomy were excluded from the public-use data file for those aged 12-19 years and over 44 years due to possible disclosure risks.
RHD018: estimated age in months at time of menarche was calculated from years of age at menarche and month of the year. For those who reported month of menarche in their birth month, it was not possible to discern which year of age menarche occurred. These instances were coded as “missing responses”.
RHD143: Current pregnancy status from question: “are you pregnant now?” Note that the variable RIDEXPRG found in the NHANES DEMO (demographic) data file was derived both from self-reported current pregnancy status and laboratory urine pregnancy test (UCPREG) results. Women who reported being pregnant at the time of exam or during the MEC Interview were assumed to be pregnant (RIDEXPRG=1). Those who reported they were not pregnant or did not know their pregnancy status were further classified on the results of the urine pregnancy test.
MEC exam sample weights should be used for the analyses. In 2007-2008, pregnant women and persons 12-19 were no longer oversampled. Additionally, for each of the race/ethnicity domains the former age domains 12-15 and 16-19 were combined (12-19) and the age minority domain 40-59 was split into two 10-year age sampling domains: 40-49 and 50-59. These changes resulted in an increase in the actual number of participants aged 40-59 years and a decrease in participants aged 12-19 years, as compared to previous cycles. Therefore, unweighted frequencies of certain reproductive conditions may differ slightly in this survey cycle compared to survey cycles prior to 2007.
Analysts should carefully review questionnaires and the documentation when combining variables across cycles since modifications in content and changes in target ages and skip patterns may affect the availability of certain variables.
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.
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
6 to 28 | Range of Values | 2954 | 2954 | |
0 | Hasn't started yet | 32 | 2986 | End of Section |
777 | Refused | 4 | 2990 | RHQ020 |
999 | Don't know | 35 | 3025 | RHQ020 |
. | Missing | 261 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
103 to 190 | Range of Values | 411 | 411 | |
7777 | Refused | 0 | 411 | |
9999 | Don't know | 36 | 447 | |
. | Missing | 2839 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Younger than 10 | 0 | 0 | |
2 | 10 to 12 | 11 | 11 | |
3 | 13 to 15 | 13 | 24 | |
4 | 16 or older | 6 | 30 | |
7 | Refused | 1 | 31 | |
9 | Don't know | 4 | 35 | |
. | Missing | 3251 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 1552 | 1552 | RHQ060 |
2 | No | 1434 | 2986 | |
7 | Refused | 5 | 2991 | |
9 | Don't know | 2 | 2993 | |
. | Missing | 293 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Pregnancy | 13 | 13 | |
2 | Breast feeding | 4 | 17 | |
3 | Hysterectomy | 494 | 511 | |
7 | Menopause/Change of life | 822 | 1333 | |
9 | Other | 95 | 1428 | |
77 | Refused | 0 | 1428 | |
99 | Don't know | 6 | 1434 | |
. | Missing | 1852 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
13 to 69 | Range of Values | 1380 | 1380 | |
777 | Refused | 6 | 1386 | |
999 | Don't know | 52 | 1438 | |
. | Missing | 1848 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Younger than 30 | 1 | 1 | |
2 | 30 to 34 | 2 | 3 | |
3 | 35 to 39 | 3 | 6 | |
4 | 40 to 44 | 7 | 13 | |
5 | 45 to 49 | 15 | 28 | |
6 | 50 to 54 | 9 | 37 | |
7 | 55 or older | 5 | 42 | |
77 | Refused | 0 | 42 | |
99 | Don't know | 10 | 52 | |
. | Missing | 3234 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 160 | 160 | |
2 | No | 1548 | 1708 | |
7 | Refused | 2 | 1710 | |
9 | Don't know | 1 | 1711 | |
. | Missing | 1575 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 115 | 115 | |
2 | No | 1594 | 1709 | |
7 | Refused | 2 | 1711 | |
9 | Don't know | 0 | 1711 | |
. | Missing | 1575 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 116 | 116 | |
2 | No | 1581 | 1697 | |
7 | Refused | 2 | 1699 | |
9 | Don't know | 12 | 1711 | |
. | Missing | 1575 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 2135 | 2135 | |
2 | No | 851 | 2986 | RHD280 |
7 | Refused | 4 | 2990 | RHD280 |
9 | Don't know | 2 | 2992 | RHD280 |
. | Missing | 294 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 51 | 51 | |
2 | No | 828 | 879 | |
7 | Refused | 0 | 879 | |
9 | Don't know | 13 | 892 | |
. | Missing | 2394 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 to 30 | Range of Values | 2133 | 2133 | |
77 | Refused | 2 | 2135 | |
99 | Don't know | 0 | 2135 | |
. | Missing | 1151 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 177 | 177 | |
2 | No | 1943 | 2120 | RHQ166 |
3 | Borderline | 11 | 2131 | RHQ166 |
7 | Refused | 1 | 2132 | RHQ166 |
9 | Don't know | 1 | 2133 | RHQ166 |
. | Missing | 1153 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
15 to 44 | Range of Values | 177 | 177 | |
777 | Refused | 0 | 177 | |
999 | Don't know | 0 | 177 | |
. | Missing | 3109 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
0 to 13 | Range of Values | 2119 | 2119 | |
77 | Refused | 1 | 2120 | |
99 | Don't know | 1 | 2121 | |
. | Missing | 1165 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
0 to 7 | Range of Values | 1258 | 1258 | |
77 | Refused | 1 | 1259 | |
99 | Don't know | 0 | 1259 | |
. | Missing | 2027 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 353 | 353 | |
2 | No | 1652 | 2005 | RHQ171 |
7 | Refused | 1 | 2006 | RHQ171 |
9 | Don't know | 13 | 2019 | RHQ171 |
. | Missing | 1267 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
14 to 42 | Range of Values | 352 | 352 | |
777 | Refused | 0 | 352 | |
999 | Don't know | 1 | 353 | |
. | Missing | 2933 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
0 to 13 | Range of Values | 2018 | 2018 | |
77 | Refused | 1 | 2019 | |
99 | Don't know | 0 | 2019 | |
. | Missing | 1267 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
13 to 42 | Range of Values | 1972 | 1972 | |
777 | Refused | 1 | 1973 | |
999 | Don't know | 4 | 1977 | |
. | Missing | 1309 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
13 to 53 | Range of Values | 1993 | 1993 | |
777 | Refused | 0 | 1993 | |
999 | Don't know | 2 | 1995 | |
. | Missing | 1291 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
2 to 24 | Range of Values | 150 | 150 | |
1 | 1 month or less | 11 | 161 | |
777 | Refused | 0 | 161 | |
999 | Don't know | 0 | 161 | |
. | Missing | 3125 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 42 | 42 | |
2 | No | 119 | 161 | |
7 | Refused | 0 | 161 | |
9 | Don't know | 0 | 161 | |
. | Missing | 3125 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 557 | 557 | |
2 | No | 1924 | 2481 | RHQ305 |
7 | Refused | 0 | 2481 | RHQ305 |
9 | Don't know | 4 | 2485 | RHQ305 |
. | Missing | 801 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
17 to 82 | Range of Values | 550 | 550 | |
777 | Refused | 0 | 550 | |
999 | Don't know | 7 | 557 | |
. | Missing | 2729 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 287 | 287 | |
2 | No | 2158 | 2445 | RHQ420 |
7 | Refused | 0 | 2445 | RHQ420 |
9 | Don't know | 39 | 2484 | RHQ420 |
. | Missing | 802 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
17 to 80 | Range of Values | 282 | 282 | |
777 | Refused | 0 | 282 | |
999 | Don't know | 5 | 287 | |
. | Missing | 2999 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 1736 | 1736 | |
2 | No | 1242 | 2978 | |
7 | Refused | 5 | 2983 | |
9 | Don't know | 6 | 2989 | |
. | Missing | 297 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 422 | 422 | |
2 | No | 2049 | 2471 | End of Section |
7 | Refused | 5 | 2476 | End of Section |
9 | Don't know | 9 | 2485 | End of Section |
. | Missing | 801 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
10 | Pills | 311 | 311 | |
77 | Refused | 0 | 311 | |
99 | Don't know | 4 | 315 | |
. | Missing | 2971 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
11 | Patches | 59 | 59 | |
. | Missing | 3227 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
12 | Cream/suppository/injection | 107 | 107 | |
. | Missing | 3179 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
13 | Other | 6 | 6 | |
. | Missing | 3280 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 218 | 218 | |
2 | No | 72 | 290 | RHQ570 |
7 | Refused | 0 | 290 | RHQ570 |
9 | Don't know | 21 | 311 | RHQ570 |
. | Missing | 2975 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 to 34 | Range of Values | 213 | 213 | |
77 | Refused | 0 | 213 | |
99 | Don't know | 5 | 218 | |
. | Missing | 3068 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Months | 59 | 59 | |
2 | Years | 154 | 213 | |
7 | Refused | 0 | 213 | |
9 | Don't know | 0 | 213 | |
. | Missing | 3073 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 55 | 55 | |
2 | No | 233 | 288 | RHQ580 |
7 | Refused | 0 | 288 | RHQ580 |
9 | Don't know | 23 | 311 | RHQ580 |
. | Missing | 2975 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 to 17 | Range of Values | 54 | 54 | |
77 | Refused | 0 | 54 | |
99 | Don't know | 1 | 55 | |
. | Missing | 3231 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Months | 18 | 18 | |
2 | Years | 36 | 54 | |
7 | Refused | 0 | 54 | |
9 | Don't know | 0 | 54 | |
. | Missing | 3232 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 47 | 47 | |
2 | No | 4 | 51 | RHQ596 |
7 | Refused | 0 | 51 | RHQ596 |
9 | Don't know | 8 | 59 | RHQ596 |
. | Missing | 3227 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 to 34 | Range of Values | 47 | 47 | |
77 | Refused | 0 | 47 | |
99 | Don't know | 0 | 47 | |
. | Missing | 3239 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Months | 14 | 14 | |
2 | Years | 33 | 47 | |
7 | Refused | 0 | 47 | |
9 | Don't know | 0 | 47 | |
. | Missing | 3239 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Yes | 5 | 5 | |
2 | No | 43 | 48 | End of Section |
7 | Refused | 0 | 48 | End of Section |
9 | Don't know | 11 | 59 | End of Section |
. | Missing | 3227 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 to 5 | Range of Values | 5 | 5 | |
77 | Refused | 0 | 5 | |
99 | Don't know | 0 | 5 | |
. | Missing | 3281 | 3286 |
Code or Value | Value Description | Count | Cumulative | Skip to Item |
---|---|---|---|---|
1 | Months | 3 | 3 | |
2 | Years | 2 | 5 | |
7 | Refused | 0 | 5 | |
9 | Don't know | 0 | 5 | |
. | Missing | 3281 | 3286 |