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Women’s Health Data in the National Survey of Family Growth (NSFG). Anjani Chandra, Ph.D. (AChandra@cdc.gov). NSFG - purposes. Help to explain birth certificate data Collect periodic data on the “intermediate variables” related to fertility & reproductive health in the U.S.
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Women’s Health Data in the National Survey of Family Growth (NSFG) Anjani Chandra, Ph.D. (AChandra@cdc.gov)
NSFG - purposes • Help to explain birth certificate data • Collect periodic data on the “intermediate variables” related to fertility & reproductive health in the U.S. • Enable demographic & public health research in these areas
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
Uses of NSFG data • “Snapshot” of U.S. fertility, family formation, and reproductive health • Track national health objectives • e.g., Healthy People 2010 Family Planning, MCH, and HIV/STD Objectives • Evaluate health & social policies • Research
NSFG - sample design • Nationally representative sample of women • Civilian non-institutionalized population of women 15-44 • Probability sample; multistage, stratified, cluster design; 8-10,000 women per Cycle • 6 Cycles so far (1973, 1976, 1982, 1988, 1995, 2002) • 1988 & 1995 samples based on NHIS
Summary of Women’s Health Data in 2002 NSFG
Complete Pregnancy History For pregnancies: Date, outcome, gest. length, wantedness of each For all recent (non-abortion) pregnancies: • Smoking during pregnancy • 1st prenatal care visit For live births: • Birth weight and sex (regardless of date of birth) • Payment for delivery and maternity leave (recent births) • Breastfeeding (children 18 and under)
Sexual Experience • First intercourse; characteristics of first partner • Numbers of sexual partners • Lifetime; last 12 months • Partner history (last 12 months)
Contraceptive History Method use for any reason • Methods ever used • First method used and method used at 1st sex • Partner-specific method use (3 most recent in last 12 mos) • Month-by-month method calendar for last 3 years • Method use preceding pregnancies
Sterilization and Infertility • Sterilization operations: type, date, reasons, reversals • 12-month infertility • Impaired fecundity • Nonsurgical sterility • Subfecundity • 36-month infertility
Health Services • Family planning services • Infertility & miscarriage services • Other medical services • Focus on use of Title X Clinics • Focus on last 12 months
Reproductive Health • Pelvic Inflammatory Disease • Other reproductive health-related conditions & behaviors • Diabetes (preg-related or other) • Hypertension (preg-related or other) • HIV testing
Audio CASI • Pregnancy re-reporting • Cigarette, alcohol, and other drug use • Forced sexual intercourse (18-44 only) • Other types of sex and numbers of sexual partners • Same-sex partners • Sexual orientation & attraction • Sexually transmitted infections • Other sensitive items related to sexual behavior & STD/HIV risk
Public Use Data Files • Cycles 1 - 5 are currently available • Files available for Cycle 6 will include • Female file • Pregnancy file • Male file • Web-based documentation for Cycle 6 will include • User’s Guide • Codebook • Questionnaires
Restricted Use Data Files: • Omitted Items File (mainly Audio CASI data) • Contextual Data Files (community characteristics for 2000 & 2002 addresses; 4 levels of aggregation)
For further information on NSFG(including Cycle 6 PUF release): • http://www.cdc.gov/nchs/nsfg.htm • http://www.cdc.gov/nchs/r&d/rdc.htm • Contextual data access for Cycle 5 • NSFG-NHIS linked analysis (Cycles 4 & 5) • Restricted-use files for Cycle 6 • Summary reports on 1995 NSFG (similar reports planned for Cycle 6) • Series 23, #19 (Findings) • Series 1, #36 (Methodology, field operations) • Series 2, #124 (Sample design, variance estimation, imputation)