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At least 1,729 records · Page 96Linked to original sources
PubMed1997

Induced abortion and the risk of breast cancer.

BACKGROUND: It has been hypothesized that an interrupted pregnancy might increase a woman's risk of breast cancer because breast cells could proliferate without the later protective effect of differentiation. METHODS: We established a population-based cohort with information on parity and vital status consisting of all Danish women born from April 1, 1935, through March 31, 1978. Through linkage with the National Registry of Induced Abortions, information on the number and dates of induced abortions among those women was combined with information on the gestational age of each aborted fetus. All new cases of breast cancer were identified through linkage with the Danish Cancer Registry. RESULTS: In the cohort of 1.5 million women (28.5 million person-years), we identified 370,715 induced abortions among 280,965 women (2.7 million person-years) and 10,246 women with breast cancer. After adjustment for known risk factors, induced abortion was not associated with an increased risk of breast cancer (relative risk, 1.00; 95 percent confidence interval, 0.94 to 1.06). No increases in risk were found in subgroups defined according to age at abortion, parity, time since abortion, or age at diagnosis of breast cancer. The relative risk of breast cancer increased with increasing gestational age of the fetus at the time of the most recent induced abortion: <7 weeks, 0.81 (95 percent confidence interval, 0.58 to 1.13); 7 to 8 weeks, 1.01 (0.89 to 1.14); 9 to 10 weeks, 1.00 >12 weeks, 1.38 (1.00 to 1.90) (reference category, 9 to 10 weeks). CONCLUSIONS: Induced abortions have no overall effect on the risk of breast cancer.

Abortion, Induced↗
PubMed1986

Immigration to Western Europe, 1952-1982: a time-series analysis of movement to Sweden, France, and Essen.

"Two contradictory approaches--an equilibrium view based on neoclassical economic principles and a structuralist view based on labour needs of core economies--dominate contemporary international migration research. Using a monthly time-series for Essen [Federal Republic of Germany], Sweden, and France for 1952-1982 of immigration by different nationalities, a specific hypothesis derived from the neoclassical view, relating immigration to economic growth and stagnation, was tested using the Box-Jenkins ARIMA modelling approach." The only support for the hypothesis came from the example of the local labor market in Essen. The author notes that "most migration flows are described by complex ARIMA models. Immigration legislation had a stronger and more direct effect on the strength and timing of flows than economic trends. Predictions based on univariate and bivariate models are not very useful: immigration trends over the past decade are significantly different from earlier flows."

Demography↗
PubMed1988

A comparison of unemployment, income and mortality interaction for five European countries.

The relationship between unemployment and health status is examined in a comparative study of five European countries using a time series model. "The hypothesis considered in this paper is that the secular decline in mortality rates can be attributed to the secular rise in real per capita income and that the remaining fluctuations in mortality rates can be explained by cyclical movements in income and variations in unemployment." The data concern the Federal Republic of Germany, France, Italy, Sweden, and Ireland.

Demography↗
PubMed1992

The changing geography of mortality in Norway, 1969-1989.

"Changes in the geographical mortality pattern for Norway between 1969 and 1989 are explored for total mortality, coronary heart disease, stomach cancer, breast cancer, lung cancer, melanoma, infant mortality and suicide. The period has shown considerable flux. Coronary heart disease mortality used to be higher in urban than rural areas, but the situation has now reversed (for men) or equalized (for women). The excess infant mortality in the periphery has been eliminated. Suicide has increased faster in fishing and farming areas than in the cities. The changes are interpreted through some concepts and models: the epidemiological transition, geographical and social diffusion, regional restructuring, changes of the physical environment and geographical uniqueness." Data are from official sources.

Biology↗
PubMed1995

Household migration and the local public sector: evidence from Sweden, 1981-1984.

"In this paper, the relationship between public sector attributes and household characteristics, and Swedish household migration, 1981-4, is studied. We report results separately for metropolitan and nonmetropolitan areas because the per capita levels of the tax base and intergovernmental grants are theoretically important migration determinants where population is sparse, whilst the tax rate may be more important where population is dense. Because fiscal influences are likely to be stronger for short-distance migration, we apply multinomial logit to a three-way choice set: staying and migrating short and long distances. Empirical results support our fiscal hypotheses and are consistent with previous findings on household characteristics." (SUMMARY IN FRE AND GER)

Demography↗
PubMed1983

A time series analysis of Swedish illegitimacy rates, 1911-1974.

Using a sociodemographic model of the determinants of illegitimacy rates, a multivariate regression analysis of annual change in age-specific Swedish illegitimacy rates is applied to the 1911-74 period. The proxy measure of change in sexual activity was significant for all age groups. Legitimation rates for out-of-wedlock conceived births were significant for all ages except teenagers, and the final predictor, women's status, was significant for all ages except women 35-44. Explained variance for annual change was highest among ages 20-24 (66%), 25-29 (66%), and 30-34 (63%) and lower among teens (34%) and women 35-44 (47%). These results support earlier research that used a sociodemographic model to explain post-World War II change in cross-national illegitimacy rates among 23 developed countries.

Adolescent↗
PubMed1986

Parameterized multistate population dynamics and projections.

"This article reports progress on the development of a population projection process that emphasizes model selection over demographic accounting. Transparent multiregional/multistate population projections that rely on parameterized model schedules are illustrated [using data primarily from a number of developed countries, particularly Sweden], together with simple techniques that extrapolate the recent trends exhibited by the parameters of such schedules." The author notes that "the parameterized schedules condense the amount of demographic information, expressing it in a language and variables that are more readily understood by the users of the projections. In addition, they permit a concise specification of the expected temporal patterns of variation among these variables, and they allow a disaggregated focus on demographic change that otherwise would not be feasible."

Demography↗
PubMed1977

Sex ratio in a sample of human fetuses in Denmark, 1962-1973.

The sex ratio was determined in 791 fetuses from pregnant women in the Copenhagen area 1962-1973. All the mothers were sterilized in connection with an induced abortion. Eighty percent of the fetuses had a crown-rump length between 50 mm and 150 mm corresponding to postmenstrual age of 11-19 weeks. The sex ratio was 138. There was no association between length and sex ratio. The difference between this sex ratio and that for live births in Denmark 1962-1973 (105-9) is substantial.

Abortion, Induced↗
PubMedDate not supplied

Uncertainties in designation of age at menarche in the nineteenth century: revised mean for Denmark, 1835.

The earliest Danish study of mean age at menarche by Ravn (Fenger 1850) is analysed with special reference to age recordings and their subsequent groupings into age-classes. Uncertainties of interpretation of the age designations are discussed, and it is argued that, in all probability, mean age at menarche was 17 years in the samples of Danish women born around 1820, rather than below 16 years as believed previously.

Adolescent↗