Randomized Controlled Trial of Periconceptional Multivitamin Supplementation on Structural Birth Defects and Pregnancy Outcomes, 1984-1994

Investigators: Andrew E. Czeizel

The Randomized Controlled Trial of Periconceptional Multivitamin Supplementation on Structural Birth Defects and Pregnancy Outcomes was conducted between 1984 and 1994 at the Family Planning Center in Budapest, Hungary. The study was conducted to test the preventive effect of periconceptional1 multivitamin supplementation on the first occurrence of neural tube defects and other congenital abnormalities. The study was a randomized double-blind controlled trial involving 4,862 informative offspring from 4,783 women. Women planning a pregnancy were randomly assigned to receive a single tablet of a vitamin supplement or a trace-element supplement daily for at least one month before conception and until the date of the second missed menstrual period or later. Up to four visits with study staff took place during the study. Pregnancy outcomes were evaluated prenatally, shortly after birth, and during a follow-up medical examination after the infants' 8th month of life.

Rehabilitation Services Administration-Social Security Administration Data Link, 1988

Investigators: Rehabilitation Services Administration, Social Security Administration

The State-Federal Program of Vocational Rehabilitation provides individualized vocational rehabilitation services to persons with disabilities to help them attain, maintain, or regain employment. In the course of providing these services, State Rehabilitation Agencies maintain case records on all of the individuals requesting services under the Rehabilitation Act of 1973 as amended. In an effort to improve program evaluation through the exchange of statistical information, the Department of Education's Rehabilitation Services Administration (RSA) and the Social Security Administration (SSA) have established a Data Link. The continuing exchange of RSA-SSA Data was established in law with Section 141 of the Rehabilitation Act Amendments of 1992. The merging of records of these two agencies has advanced the understanding of the rehabilitation experience of disabled persons by providing their employment, earnings, and beneficiary history following the receipt of services through the State-Federal Program of Vocational Rehabilitation. The RSA-SSA Data Link allows researchers to examine key issues regarding rehabilitation, including whether or not rehabilitated persons remain employed and for how long; the earnings of rehabilitated persons in the years following case closure; how earnings of rehabilitated persons compare to those of persons who could not be rehabilitated or who were not accepted for rehabilitation services; how well severely disabled individuals responded to their rehabilitation experience compared to their non-severely disabled counterparts; how frequently rehabilitated persons become publicly supported; whether or not rehabilitated persons are less likely to require public support than individuals who could not be rehabilitated or were not accepted for rehabilitation services; and the work histories of disabled persons in the years prior to their rehabilitative experience.

Second U.S. National Health and Nutrition Examination Survey: Selected Variables, 1976-1980

Investigators: National Center for Health Statistics

The second National Health and Nutrition Examination Survey (NHANES II) is one of a series of related programs carried out over the past 20 years by the U. S. National Center for Health Statistics. The first National Health and Nutrition Examination Survey (NHANES I, DAAPPP data set 19) was designed as a national probability study involving approximately 30,000 individuals and was carried out between 1971 and 1975. Even before the completion of NHANES I, plans were underway for the second survey. A major consideration in the design of the NHANES II was that content and procedures should permit comparison with NHANES I data. The experience gained in the NHANES I program, however, made possible certain modifications in NHANES II in order to make the data obtained more useful. For example, NHANES I revealed anemia to be a significant health problem in the U.S., and anemia was investigated in more detail in NHANES II. Additional variables were also included in the study after extensive consultation with numerous other Federal agencies and departments. The survey included two main components: (1) household and medical history questionnaires, and (2) medical examinations. The questionnaires were designed to obtain basic demographic data, information on participation in food programs, and data on each individual's general medical history. The medical examination included dental, dermatological, and ophthalmological examinations; body measurements; biochemical tests; a supplementary medical history questionnaire; and dietary interviews. Like the NHANES I file, the NHANES II DAAPPP file contains information on demographic background characteristics; participation in school lunch, milk, and breakfast programs; birth weight and condition; medical history; and medical examination results, including indices of nutritional status, body build, and bone structure. The DAAPPP HANES II file contains data only for children aged 6 months to 11 years. Because data on the age of the child's mother is included, this is an excellent data set for examining the health consequences for children of teen-aged mothers.

Social Influences on the Sexual Behavior of Youth at Risk for HIV Exposure, 1992

Investigators: Daniel Romer

The study Social Influences on the Sexual Behavior of Youth at Risk for HIV Exposure: 1992 was conducted to aid in the design of HIV prevention-related interventions in poor urban minority communities. A computerized personal interview was administered to 300 African-American children aged 9-15 living in six public housing developments in a large U.S. city. The interview elicited information on several themes including: social support, parental supervision, perceived risk exposure, and self-reported behavior and feeling. This data set includes information on 94 variables from a sample of 300 respondents. Interviews were conducted during March through May of 1992.

State-Wide Indian Drug Prevention Program

Investigators: Steven P. Schinke

The program is a drug prevention program, designed to combine a social learning based intervention with bicultural competence theory. Bicultural competence encompasses skills that can enable American-Indian people to adapt the roles in which they were raised with the culture in which they are surrounded. The three subgoals of bicultural competence, knowledge and practice in communication, coping, and discrimination skills, provide the theoretical foundation for intervention to prevent substance abuse with American-Indian youth. The original program was designed primarily for fourth and fifth grade Native American/Alaskan Native students in s classroom setting, but it can easily be modified for higher-grade levels and other adolescents. The curriculum can be implemented in a wide variety of settings, including public schools, tribal schools, tribal community centers, and student retreats. The intervention is administered in 15 one-hour sessions. Click here to view more detailed information on this program.

Study of Adolescent Sexual Behavior, Raleigh, North Carolina, 1978-1981

Investigators: Richard Udry

The Study of Adolescent Sexual Behavior was a three wave panel study conducted between August 1978 and June 1981 by the Carolina Population Center (CPC). The study explored adolescent attitudes and behavior with respect to sexuality. In addition to student questionnaires, parents of the adolescents were interviewed across all three waves of the study. The DAAPPP file consists of information on student respondents, which is supplemented by information provided by parents, as well as interviewer observations about the respondent. Topics covered in the interview include: physical and sexual development; sexual history; attitudes and beliefs concerning social and sexual behavior; demographic information on the respondent and the respondent's family and household (sex, religion, occupation, etc.); and items concerning the mental health of the respondent pertaining to locus of control, future orientation, and self-satisfaction. The study also used a technique of matching respondent questionnaires to those of friends in the school to analyze the social structure of peer influence on sexual behavior. The matching technique, after being refined for the second wave, obtained same sex matches for more than 90 percent of the respondents, and nearly 90 percent were matched with at least three other respondents.

Study of Adolescent Sexual Behavior, Tallahassee, Florida, 1980-1982

Investigators: Richard Udry

The Study of Adolescent Sexual Behavior, Tallahassee was a two wave panel study conducted between January 1980 and August 1982 by the Carolina Population Center (CPC). The study explored adolescent attitudes and behavior with respect to sexuality. In addition to student questionnaires, parents of the adolescents were interviewed across both waves of the study. The DAAPPP file consists of information on student respondents, which is supplemented by information provided by parents, as well as interviewer observations about the respondent. Topics covered in the interview include: physical and sexual development; sexual history; attitudes and beliefs concerning social and sexual behavior; demographic information on the respondent and the respondent's family and household (sex, religion, occupation, etc.); and items concerning the mental health of the respondent pertaining to locus of control, future orientation, and self-satisfaction. The study also used a technique of matching respondent questionnaires to those of friends in the school to analyze the social structure of peer influence on sexual behavior.

Study of Outpatient Physical Therapy Practices, 1991

Investigators: Alan Jette

During 1989 and 1990, Mathematica Policy Research, Inc. (MPR) conducted a national survey of facilities that provide outpatient physical therapy services. The 1991 Study of Outpatient Physical Therapy Practices (SOPTP), was conducted to provide the American Physical Therapy Association (APTA) with a description of clients who have received treatment in outpatient settings. These settings include acute care hospitals, rehabilitation hospitals, private physical therapy practices (PPTs), and physicians offices. Prior to this study, no single source or combination of sources could provide detailed and accurate data on what physical therapists do in relation to treatment and evaluation. This study was designed to provide reliable estimates of the volume, types, duration, and charges for physical therapy services provided in different outpatient settings. The study was conducted annually over three years, with each wave in the field for 12 months to control for unforeseen seasonal affects. The first year was considered a pilot study. The second and third years of data collection are archived here. Facilities were randomly selected separately for each study year. Data are weighted to correct for sampling biases. Sampled facilities completed a 20 minute telephone interview. Each facility was then asked to provide data on a small number of recently discharged clients. Sociometrics has archived these data as two separate datasets: facility-level data and patient level data, which can be merged by a facility identifying variable into a single hierarchical dataset.

Survey of Income and Program Participation (SIPP)

Investigators: United States Census Bureau

The main objective of the Survey of Income and Program Participation (SIPP) is to provide accurate and comprehensive information about income and program participation of individuals and households in the United States, and about the principal determinants of income and program participation. SIPP offers detailed information on cash and noncash income on a sub annual basis. The survey also collects data on taxes, assets, liabilities, and participation in government transfer programs. SIPP data allow the government to evaluate the effectiveness of federal, state, and local programs.

Survey of Income and Program Participation Core and Disability Modules, 1992/1993

Investigators: Bureau of Census, Jack McNeil

The Survey of Income and Program Participation (SIPP) is a large panel study of civilian non-institutionalized U.S. citizens. Conducted by the U.S. Census Bureau, SIPP provides detailed income and other economic resource distribution information for the U.S. population. Using these data, program analysts, policy makers, or other researchers can then predict assistance program eligibility rates. The survey focuses primarily on improving data on people who are economically at risk: poor or near-poor people and middle-income people who, if they lost a spouse, parent or job, would likely experience economic deprivation and might then require federal assistance. Secondary to this core set of information, SIPP adds question modules about a variety of policy related topics. This user's guide pertains to SIPP's overlapping crosssectional core data and modules on disability from the 1992 and 1993 panels.