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Using Data From the National Survey of Family Growth (NSFG)

This presentation provides an overview of the purposes, uses, and methodology of the NSFG data. It discusses the similarities and new features in Cycle 6, as well as the questionnaire content. The presentation covers intermediate variables such as timing of first intercourse, frequency of intercourse, social factors, conception variables, and pregnancy outcome variables. It also highlights the uses of NSFG data in evaluating health and social policies, tracking national health objectives, and conducting demographic and public health research.

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Using Data From the National Survey of Family Growth (NSFG)

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  1. Using Data From the National Survey of Family Growth (NSFG) William Mosher, Ph.D. Stephanie Willson, Ph.D.

  2. Presentation Overview • Purposes and uses of NSFG data • Cycle 6 (2002) sample design and methodology • Similarities between Cycles 5 and 6 • New in Cycle 6 • Questionnaire content • Using NSFG data

  3. Intermediate variables Intercourse variables: • Timing of first intercourse • Percent of women who • ever had intercourse • Time spent in marriage • (separation, divorce) • Frequency of intercourse Social factors • Race/ethnicity • Religion • Labor force • participation • Education • Income • Access to • health care • Family • background • Community • environment • (economic, • social, etc.) Conception variables: Fertility (live births) • Contraceptive use • Sterilization • Infertility Pregnancy outcome (gestation) variables: • Miscarriage and • stillbirth • Induced abortion

  4. Collect periodic data on the “intermediate variables” “Snapshot” of U.S. fertility, family formation, and reproductive health Complement vital statistics Track national health objectives (e.g. Healthy People 2010) Evaluate health and social policies Research: demographic and public health Uses of NSFG Data

  5. NSFG History in Brief

  6. Public use files of Cycles 1-5 of the NSFG are available now on CD-ROM Cycle 6 will be available on CD-ROM this Fall If you have questions, want to request a CD, or wish to be notified when Cycle 6 data are available, please email: William Mosher (wdm1@cdc.gov) Anjani Chandra (ayc3@cdc.gov) Joyce Abma (jza2@cdc.gov) Gladys Martinez (gmm7@cdc.gov) Stephanie J. Willson (zex8@cdc.gov) Obtaining Data Files National Center for Health Statistics 3311 Toledo Rd. Room 7318 Hyattsville, MD 20782

  7. Cycle 6 Sample Design • Nationally representative sample of women & men 15-44 years of age. • Civilian non-institutionalized population. • In-person (not telephone) interviews with one person (15-44) per household.

  8. Cycle 6 Design • Interviews in both English and Spanish • Over-samples: Blacks, Hispanics, 15-24 year olds • Informed Consent: • Signed consent for adults (18-44 years of age) • Signed assent and signed parental consent for minors (15-17 years of age)

  9. Breakdown of Sample Sizes for Cycles 3-6

  10. Cycle 6 Sample Sizeby Subgroup

  11. Sample Weights Adjust for: • Differential probability of selection • Non-response rates • Post-stratification (age, race, sex).

  12. Cycle 6 Response Ratesby age & sex Overall response rate = 79%

  13. Examples of Topics in Cycle 5 Also Covered in Cycle 6

  14. Probability that 1st Marriage Dissolves Within Ten Years Percent Age at marriage Race and Hispanic Origin Source: Bramlett & Mosher, 2002 (based on 1995 NSFG)

  15. Cumulative percent of females 15-19 years of age who have had sex before reaching selected ages, 1988 and 1995 Percent 77 70 19 11 1 3 Age in years Source: Abma and Sonenstein, 2000

  16. Percent of Current Contraceptors using the Pill, 1982-1995 Percent Source: Piccinino & Mosher, 1998

  17. Percent Living with Father at Time of Most Recent Delivery Percent Wantedness at Conception Source: Chandra, poster presented at PAA 1998

  18. Percent Breastfed among Babies Born 1990-1993 Percent Wantedness of Pregnancy at Conception Source: Abma et al., 1997, Table 57

  19. Percent of Births 1991-95 Unwanted by Mother at Time of Conception Percent Race and Hispanic Origin Source: Abma et al., 1997, Table 15

  20. Use of Family Planning or Medical Services in Past Year Among Women 15-44: U.S., 1995 Percent Source: Abma et al., 1997, Table 74

  21. Ever-Married Childless Women Age 35-44: Childbearing Expectations and Fecundity 1988 1995 1982 (Expect 1 or more) (Expect 0, fecund) (Expect 0, impaired fecundity) Source: Abma & Martinez, Paper Presented at PAA, 2002

  22. Percent Uninsured Among Women 15-44 Percent Race and Hispanic Origin Source: 1995 National Survey of Family Growth

  23. New in Cycle 6

  24. Definition of Sex (CAPI vs. Audio-CASI) • Most of interview (CAPI) continues practice in Cycles 1-5: Heterosexual vaginal intercourse The kind of sex  Babies • New in Cycle 6: All types of sexual activities (Audio-CASI) including vaginal, oral, & anal sex Sex  risks for STDs and HIV

  25. Activities with children For children he lives with For children he does not live with Military service Male fertility Marital Non-marital Child support New in Cycle 6: Male Data Some examples include:

  26. Data that’s available for both men & women--1 • Demographic characteristics • Birth expectations • Marital Status and Cohabitation • Attitudes: Sex, childbearing, family • Contraceptive use and Sterilization

  27. Data that’s available for both men & women--2 • Health insurance, use of health care • Number of sexual partners • HIV/STD risk behaviors • Substance use • Sexual orientation, attraction, behavior

  28. Female Questionnaire: 2002 • Section A: • Age, race, marital/cohabitation status, education • Household roster • Family & parental background • Section B: • Pregnancy history • Nonbiological children ever raised • Adoption (including current plans to adopt)

  29. Female Quex 2002 (cont’d) • Section C: • Marital & cohabitation history • First sexual partner • Sex education (for 15-19 year olds) • Numbers of partners • Sexual partner history for last 12 months • Section D: • Sterilization operations (self & current H/P) • Fecundity impairments

  30. Female Quex 2002(cont’d) • Section E: • All methods ever used • Contraceptive history, month-by-month, for last 3 years • Partner-specific use for 3 most recent partners in last 12 months • Consistency of condom use • Wantedness of pregnancies

  31. Female Quex (cont’d) • Section F: • Use of medical care in the last 12 months for • family planning • general health • Section G: • Desires & intentions for future children

  32. Female Quex 2002(cont’d) • Section H: • Use of infertility services • Reproductive health-related conditions • HIV testing • Section I: • Health insurance; religion; work; child care Attitudes on sex, parenthood & marriage • Section J (ACASI): Income

  33. Male Questionnaire 2002(by section) • (Largely the same as female Section A) • Ever/never had sex; partners in lifetime and last 12 months; vasectomy; sex educ (if 15-19) • Current wife or cohabiting partner: characteristics; when married or began living together; Children with her; contraceptive use • 3 most recent sexual partners in the last 12 months; first sexual partner ever; Children with them; contraceptive use • Former wives and first premarital cohabiting partner; Children with them; contraceptive use

  34. Male Questionnaire (cont’d) F. Other births and pregnancies fathered: characteristics of their mothers • Activities with biological and adopted children he lives with, and does not live with • Desires and intentions for future children • Health conditions, use of family planning and other health care services, HIV testing • Religion; military service; work; attitudes on sex, marriage, parenthood

  35. Using NSFG Data

  36. Public Use Data Files • Cycles 1 - 5 are available on CD-ROM now. • Main files for Cycle 6 (on CD-ROM and web soon) will include: • User’s Guide, • Codebook, and • Questionnaires

  37. Web-Doc for Public Use Files • Standard components of the Codebook • Variable names & column locations • Question text • Frequencies with response labels • Universe statements (“who got this question”) • New user-friendly features • Hyperlinks to questionnaires, recode specs, and other variables in codebook • Revised online so updates can be “rolled out” to users more quickly • Less need for paper copies!

  38. Omitted items data File • Will be available soon after the forthcoming Cycle 6 public use file. • Access procedures are being worked on now.

  39. Omitted Items File • Audio-CASI data • Pregnancy re-reporting • Drug and alcohol use • Numbers of sexual partners (opposite-sex and same-sex) • Non-voluntary sexual intercourse (18-44 only) • STD/HIV risk behaviors • Sexual orientation & attraction • Sexually transmitted infections • Interviewer Observations

  40. Contextual data files:Cycle 5 • Cycle 5 contextual data files currently available • Access: apply to NCHS RDC • Linkage to over 1,000 contextual variables • Community characteristics • 4 levels (state, county, census tract, block group) • 3 points in time (1990, 1993, 1995)

  41. Percent of Women 18-29 Who Had a Birth Before 18 Percent Median Family Income at Block Level Source: 1995 National Survey of Family Growth, Contextual Data Files

  42. Contextual data files:Cycle 6 • Community characteristics • 2 points in time (2000 & 2002) • data at 4 levels: • state • county • census tract • block group

  43. Applying to use contextual data • Contact us • Go to www.cdc.gov/nchs/r&d • Short application emphasizes what data you will use (not a big literature review) Access options: • Remote access (by e-mail from your office) • In person in the RDC • Staff-assisted (for follow-up & revisions)

  44. Public Use: Fieldwork Data File • Includes all persons in the sampling frame • Data on respondents and non-respondents • Response rates • Field work effort • Observations of neighborhood • Cycle 5 is available • Cycle 6 will be available in 2005

  45. How to stay current with the NSFGGo to:www.cdc.gov/nchs/nsfg.htm The NSFG website contains: • PDF files of all NSFG reports published by NCHS • A list of 360+ publications from the NSFG • PDF files of the 2002 female & male questionnaires • Information on how to obtain data files

  46. Questions?

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