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PubMed1990

High fertility of Old Colony Mennonites in Mexico.

Old Colony Mennonites in Mexico appear to demonstrate natural fertility, using no form of artificial birth control and apparently not attempting to limit family size. The resulting fertility is nearly as high as that of the Hutterites, although the Mennonites lack the communal economic system of the latter. Most Mennonites in Mexico migrated from Canada in the 1920s, and the largest single settlement, called the Manitoba Colony, is one of four in the state of Chihuahua. A 1967 partial census obtained data from 38% of the Mennonite households. Family size in the sample was close to that in a local survey taken in the same year. Available church records matched with census forms permitted verification of and corrections to 560 female reproductive histories. The median number of live births to women over age 45 years was 9.5, compared with 10.4 in the Hutterites. Age-specific marital fertility rates and birth intervals closely resembled those of the Hutterites.

Adolescent↗
PubMed1995

The new OPCS area classifications.

This article introduces the OPCS area classifications based on the 1991 Census. It illustrates the methodology and results in terms of local authority districts. It follows earlier articles in Population Trends that described the production of similar classifications after the 1971 and 1981 Censuses. Each district in Great Britain is classified as both the centre of a small cluster of districts which correspond closely to it and as a member of a cluster within a division of all districts. The list of corresponding districts is set out in full. Information is also given on how to obtain further details of the classification.

Data Interpretation, Statistical↗
PubMedDate not supplied

[Evaluation of long term care institutions for the aged in the Federal District. A critical viewpoint].

OBJECTIVE: To critically analyze the level and quality of infrastructure, human resources and organization of long term care institutions for the elderly in Mexico City and to describe the functional status and care requirements of their residents. MATERIAL AND METHODS: A census was made of the institutions located in the metropolitan area of Mexico City which totalled 115. These were classified according to their belonging to the public or private sector (for profit and non-profit). In each category we made a random selection of 33 institutions which were all assessed according to the methodology described by Firevicius and applied by PAHO in several countries in Latin-America. This questionnaire was applied by a single interviewer. Within the selected institutions, 30% of the residents, who were also randomly selected were assessed by means of the Kuntzman's care requirements scale. Out of a total population of 1955, 617 (34%) residents were assessed. RESULTS: The mean score obtained by the institutions was under 50% of the maximum possible score with a great deal of dispersion of the results. The lowest scores were identified in the private for profit sector and in a subgroup of public institutions. The highest scores were found among private non-profit institutions and a sector of the public institutions. The most important shortcomings identified were related to infrastructure and quality of human resources. The mean age of the institutionalized elderly is 76; 48.1% are functionally independent, 21.3% partially dependent and 30.6% totally dependent. When trying to correlate the mean functional status of the population of a given institution with its resources for care-giving we usually found no correlation. It is commonplace to find highly dependent populations living in poorly staffed or inadequately equipped institutions and vice versa CONCLUSIONS: Quality of care in long term care institutions in Mexico City is often poor and this is particularly true for private for profit institutions. Lack of norms and supervision pertaining to the functioning of such institutions contributes greatly to this reality.

Aged↗
PubMed1976

China's population figures: can the contradictions be resolved?

In recent years, the government of the People's Republic of China has been reporting the country's population as "nearly 800 million." A variety of evidence suggests that this approximation is the best currently available in China, and that it may be some time before further, more accurate, demographic data are produced. The paper presents and discusses alternate population estimates and projections by UN, US, and USSR specialists.

China↗
PubMed1989

[Coverage error measurement of the Canadian census].

"This paper describes the methods used by Statistics Canada to measure coverage errors in the Canadian Census." Consideration is given to data collection and analysis and to estimation techniques. (SUMMARY IN ENG AND SPA)

Americas↗
PubMed1989

American fertility in transition: new estimates of birth rates in the United States, 1900-1910.

This article presents new estimates of age-specific overall and marital fertility rates for the entire United States for the period 1900-1910. The estimation techniques are the two-census parity increment method and the own-children method. The data sources are the 1900 census public use sample and tabulations of 1910 census fertility data published with the 1940 census. Estimates are made for the total population, whites, native-born whites, foreign-born whites, and blacks. Low age-specific marital fertility at younger ages is consistent with a view of a distinctive American fertility pattern at this time.

Age Factors↗
PubMedDate not supplied

[Indirect estimates and data on migration in Brazil: a conceptual and methodological appraisal of recent census information].

Problems related to the analysis of data from the 1970 and 1980 censuses of Brazil concerning migration are explored. The author first notes that the 1980 census used new methods of data collection that make comparisons with previous censuses difficult. Procedures to overcome these problems are suggested. The inclusion for the first time in 1980 of data on intra-municipal migration is noted. "A procedure is proposed to estimate the intra-municipal migration during the decade, and to add it to estimates of other types of migration, in order to avoid double counting. Internal migration estimates for the 1960s and 1970s are presented for three States (Pernambuco, Minas Gerais [and] Sao Paulo). Special attention is paid to the different concepts implied by estimates obtained through direct and indirect measurement." (summary in ENG)

Americas↗
PubMed1994

Non-Hodgkin's lymphoma and agricultural practices in the prairie provinces of Canada.

OBJECTIVES: The aim of this study was to provide an update of a cohort study (1971-1985) that previously reported a significant trend in the risk of non-Hodgkin's lymphoma among male Saskatchewan farm operators according to fuel-oil expenditures and herbicide spraying for farms less than 1000 acres (2570 hectares) by including two additional Canadian prairie provinces, two additional years of follow-up, and data from the 1981 Census of Agriculture. METHODS: Information on farmers from 1971 records of the Census of Agriculture was linked to 1971 records of the Census of Population, to 1981 records of the Census of Agriculture, and to death records. Poisson regression was used to estimate risks according to herbicide spraying and fuel and oil expenditures. RESULTS: The addition of a further two years of follow-up resulted in lower risk estimates associated with herbicide spraying for Saskatchewan. No excess risk was observed between herbicide spraying and non-Hodgkin's lymphoma for Alberta or Manitoba in the 1971 data. However, a significantly increased risk of non-Hodgkin's lymphoma according to acres sprayed with herbicides was observed for the three provinces combined when the herbicide spraying data from the 1981 Census of Agriculture was used [> or = 380 acres (> or = 939 hectares) sprayed, rate ratio 2.11, 95% confidence interval 1.1-3.9]. CONCLUSIONS: Although the current results are not entirely consistent with the original Saskatchewan analysis, they support the overall finding of an association between herbicides and risk of fatal non-Hodgkins lymphoma. Prospective cohort studies are needed to overcome the limitations of existing epidemiologic studies.

Adult↗
PubMed2000

Developments in census taking in the last 25 years.

This article looks back at censuses of population conducted since 1971. It identifies some of the most important changes with respect to questions asked, methods of collecting the census and the production of outputs. In particular it discusses the introduction of the ONS Longitudinal Study following the 1971 Census and the Samples of Anonymised Records following the 1991 Census. This article outlines some of the changes being introduced for the 2001 Census, including methods of dealing with under-enumeration and improved access to outputs.

Censuses↗
PubMed2000

Anonymous linkage of New Zealand mortality and Census data.

BACKGROUND: The New Zealand Census-Mortality Study (NZCMS) aims to investigate socio-economic mortality gradients in New Zealand, by anonymously linking Census and mortality records. OBJECTIVES: To describe the record linkage method, and to estimate the magnitude of bias in that linkage by demographic and socio-economic factors. METHODS: Anonymous 1991 Census records, and mortality records for decedents aged 0-74 years on Census night and dying in the three-year period 1991-94, were probabilistically linked using Automatch. Bias in the record linkage was determined by comparing the demographic and socio-economic profile of linked mortality records to unlinked mortality records. RESULTS: 31,635 of 41,310 (76.6%) mortality records were linked to one of 3,373,896 Census records. The percentage of mortality records linked to a Census record was lowest for 20-24 year old decedents (49.0%) and highest for 65-69 year old decedents (81.0%). By ethnic group, 63.4%, 57.7%, and 78.6% of Maori, Pacific, and decedents of other ethnic groups, respectively, were linked. Controlling for demographic factors, decedents from the most deprived decile of small areas were 8% less likely to be linked than decedents from the least deprived decile, and male decedents from the lowest occupational class were 6% less likely to be linked than decedents from the highest occupational class. CONCLUSION: The proportion and accuracy of mortality records linked was satisfactorily high. Future estimates of the relative risk of mortality by socio-economic status will be modestly under-estimated by 5-10%.

Adolescent↗
PubMed1989

[Correcting for an undercount. The case of the U.S. census].

Undercount problems in the U.S. census are outlined, and methods to correct them are described. "Methods tested in the last decade appeared very promising, but a political decision was made not to adjust the census. That decision has now been repealed and the 1990 U.S. Census may be the first to reflect an adjustment for the undercount." (SUMMARY IN ENG AND SPA)

Americas↗
PubMed1993

Estimation of population coverage in the 1990 United States census based on demographic analysis.

"This article presents estimates of net coverage of the national population in the 1990 [U.S.] census, based on the method of demographic analysis. The general techniques of demographic analysis as an analytic tool for coverage measurement are discussed, including use of the demographic accounting equation, data components, and strengths and limitations of the method. Patterns of coverage displayed by the 1990 estimates are described, along with similarities or differences from comparable demographic estimates for previous censuses....A final section presents the results of the first statistical assessment of the uncertainty in the demographic coverage estimates for 1990." Comments by Clifford C. Clogg and Christine L. Himes (pp. 1,072-4) and Jeffrey S. Passel (pp. 1,074-7) and a rejoinder by the authors (pp. 1,077-9) are included.

Americas↗
PubMed2001

The relationship of neighborhood socioeconomic characteristics to birthweight among 5 ethnic groups in California.

OBJECTIVES: This study sought to examine relationships between neighborhood socioeconomic characteristics and birthweight, accounting for individual socioeconomic characteristics, among 5 ethnic groups. METHODS: Birth records were linked to census block-group data for 22 304 women delivering infants at 18 California hospitals during 1994-1995. Information on income and additional factors was obtained from a surveyed subset of 8457 women. Neighborhood levels of poverty, unemployment, and education were examined. RESULTS: After adjustment for mothers' individual socioeconomic characteristics and other risk factors, less-favorable neighborhood socioeconomic characteristics were associated with lower birthweight among Blacks and Asians. No consistent relationship between neighborhood socioeconomic characteristics and birthweight was found among Whites, US-born Latinas, or foreign-born Latinas overall, but birthweight increased with less-favorable neighborhood socioeconomic characteristics among foreign-born Latinas in high-poverty or high-unemployment neighborhoods. These findings were not explained by measured behavioral or cultural factors. CONCLUSIONS: In addition to individual socioeconomic characteristics, living in neighborhoods that are less socioeconomically advantaged may differentially influence birthweight, depending on women's ethnicity and nativity.

Adolescent↗
PubMed2002

Socio-economic factors and mortality among 25-64 year olds followed from 1991 to 1994: the New Zealand Census-Mortality Study.

AIM: To measure the association of income, education, occupational class, small area socio-economic deprivation, car access and labour force status with mortality among 25-64 year old males and females using the 1991 census-cohort of the New Zealand Census-Mortality Study. METHODS: Mortality records for 1991-94 were anonymously and probabilistically linked to 1991 census records, thereby creating a cohort study of all New Zealand census respondents. Odds ratios of mortality comparing categories of each socio-economic factor were calculated using logistic regression. For income, education and deprivation (NZDep91) a modified relative index of inequality (RII(10:90)) was calculated. The RII(10:90) estimates the relative risk of mortality for low socio-economic people (10th percentile rank) compared to high socio-economic people (90 percentile rank) allowing direct comparisons across socio-economic factors. RESULTS: The relative risk of all-cause mortality for 25-64 year old males with an equivalised household income less than $20,000, compared to greater than $50,000, was 2.16 (95% confidence interval 1.99 to 2.34). For females, this relative risk was 1.68 (1.52 to 1.86). Using the RII(10:90) all-cause mortality was 2.22, 1.94 and 1.58 times greater among low compared to high socio-economic males for income, NZDep91 and education, respectively. For females, these RII(10:90) estimates were 1.77, 1.69 and 1.57, respectively. By cause of death, the strongest gradients were observed for respiratory diseases, followed by lung cancer, cardiovascular disease and unintentional injury. For suicide deaths, unemployed males and females had 2.70 (1.84 to 3.95) and 2.86 (1.19 to 6.85) greater rates than the employed. CONCLUSIONS: There are strong socio-economic gradients for all-cause mortality and most specific causes of mortality among both males and female adults in New Zealand, regardless of the choice of socio-economic factor. The gradients were strongest for income, followed by small area deprivation and education, and strongest for 'preventable' causes of death.

Adult↗
PubMed1997

Methods for estimating missing data on migrants in the 1991 British census.

"This paper discusses the use of suppression to protect data in the Special Migration Statistics, a dataset produced from the 1991 [British] Census, and argues that this procedure prevents accurate analysis of the data. A computer program is described that uses a series of methods to ¿recover' data which were suppressed, and to estimate those parts of the data which cannot be recovered.... The program has been used to recover and estimate data successfully, and results include sample tables of migrants between types of districts by ethnicity."

Censuses↗
PubMed1999

Census of brown lemurs (Eulemur fulvus sspp.) in southeastern Madagascar: methods-testing and conservation implications.

Four forest areas were censused in southeastern Madagascar from June-August 1995 to estimate local population densities and habitat conditions for two threatened subspecies of brown lemur (Eulemur fulvus collaris and Eulemur fulvus albocollaris). Survey transects varied in length (1-3.5 km) and in surveillance frequency (three to seven times). Additional test surveys were conducted at the Parc National de Ranomafana to compare transect methods in an area with known population densities of Eulemur fulvus. Based on these tests, we demonstrate that the use of existing trails for transects can result in a close estimate of local population size, although more replications and longer transects increase precision. Results from regional surveys indicate considerably smaller population densities for E. f. albocollaris (0.086 animals/ha). In contrast, E. f. collaris densities were relatively high (.107 animals/ha) at Midongy-Sud. We also noted variation among sites in the density of lianas, which was positively correlated with local population density (a possible indication of habitat degradation). More generally, habitats in E. f. albocollaris's range suffered from fragmentation, reduction in forest area, logging, and potentially greater hunting pressure. Based on these results, it is apparent that more immediate steps are necessary to preserve E. f. albocollaris populations and habitats.

Animals↗
PubMed1989

Mapping population data from zone centroid locations.

The author describes the difficulties associated with the use of maps to represent census data. "A review of the problems associated with population mapping is followed by a discussion of [an alternative method known as] a raster method for handling census data, based on population-weighted centroids, and its implications for GIS "[geographic information systems]." The geographical scope is worldwide, with an example provided using data for Wales.

Developed Countries↗