|Summary for Variable Group: Pregnancy and birth history|
|This variable group provides information about the respondent's total number of births, live births, miscarriages or stillbirths, and pregnancies. It also contains information on the century month of her first and most recent live births, her age at first birth, age at menarche, menstrual status, current pregnancy status, and whether she has ever given a baby up for adoption. More complete information on pregnancies and births is located in the pregnancy interval file.
|Number of living children|
|1976 NSFG: Interval File|
|B8_3||M_B-8/PM_B-8||1976 NSFG: Interval File|
|B8_2||M_B-8/PM_B-8||1976 NSFG: Interval File|
|B8_1||M_B-8/PM_B-8||1976 NSFG: Interval File|
|This variable counts the number of living children the respondent has. Children given up for adoption are not included in this total in most years.
General Comparability Notes
Summary: This variable is highly comparable across most survey years. The variable definition varies slightly in two surveys.
The structure of the questions on living children varied across surveys. In some years, the number of living children was calculated within the survey, while in other years IFSS compiled information from the pregnancy histories to produce the total number of living children. In the 1955 GAF, information on whether each child was alive was collected directly in the pregnancy history. The 1960 GAF calculated the number of living children based on the pregnancy histories. In the 1965 NFS, the 1973 NSFG, the 1976 NSFG, the 1982 NSFG, and the 1988 NSFG, the surveys collected household rosters. Children living in the respondentís household were identified as such in the questionnaire; for children not living in the household, the survey directly asked whether they were still alive. In the 1995 and 2002 NSFG, information about living children was collected as part of the pregnancy history.
In most surveys, complete information on living children is available. However, in the 1955 GAF, information was collected on the first eight pregnancies, excluding eleven respondents who had nine or more pregnancies. In the 1995 NSFG, it was not possible to identify children who were given up for adoption or who died shortly after birth. These children are therefore included in the total number of living children in that survey.
All respondents are included in the universe of this question. Respondents who have not had children are given a value of zero for the variable.
Imputation Flag Exists
|Imputation Flag Values|
|1||Imputed in original study|
|3||Month imputed (Original file edit)|
|4||Age known, month imputed|
|5||Originally imputed as June, recoded to random month|
|7||Multiple regression imputed: Not ascertained|
|8||Multiple regression imputed: Refused|
|9||Multiple regression imputed: Don't know|
|10||Midpoint of a given range|
|11||Answer comes from a follow-up question|
|12||Midpoint of a range given as a follow-up|
|13||Answer is rounded up|
|14||Answer is rounded down|
|15||Reported months and weeks, weeks<=4|
|17||Reported months=weeks & weeks>4|
|18||Reported months!=trunc(weeks/4.35), months!=weeks, weeks>4|
|19||Months coded NA/RF/DK|
|20||Weeks coded NA/RF/DK|
|21||Impossible to determine which method used last|