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At least 829 records · Page 46Linked to original sources
PubMed1984

[Variations on the theme of logistic function].

"The use of the logistic function in demographic techniques and analyses has increased significantly during recent years. Nevertheless, not too much attention has been given to the function of the constants nor to the consequences of the implicit assumptions when the function is used for estimating some demographic parameters. In this article, the author underlines the meaning of the constants in the logistic function when applied in some demographic cases, and gives some examples of the assumptions involved in the application of the logistic to the trends of urban/rural populations, life expectancies, and the logit transformation." (summary in ENG)

Demography↗
PubMedDate not supplied

A methodology for segregating rural-urban mortality estimates.

" This study deals mainly in estimating rural/urban mortality differentials in countries where death registration by place of residence is nonexistent or inadequate. The methodology was applied to Philippine death registration data of 1975 and the result was compared to those estimates obtained by applying Brass, Sullivan and Trussell techniques on the 1978 World Fertility Survey data of children ever born and children still living. Basically, the methodology allocates death registration data to rural and urban areas by applying to each geographic unit several indices of urbanization. This is possible when death registration in developing nations is tabulated by geographic units, such as province, region, state, island, etc. The underlying assumption is that some geographic units are more urbanized than others. The process involves identification of these units and combining them into urban areas. This likewise implies that the remaining areas can be combined as rural." (SUMMARY IN FRE AND ITA)

Asia↗
PubMed1995

[Rural communes and small towns in the urban hierarchy].

"A determining factor in the demographic and employment dynamics of rural communes and certain small towns [in France] is how far they are from the nearest large town. Demographic dynamics and employment trends are somewhat adverse for those living far from urban influences. The main reasons for this would appear to be the slump in agriculture. This said, demographic and employment trends are much improved nearer the large towns, especially since the towns exerting the influence have more inhabitants." (SUMMARY IN ENG AND GER AND SPA)

Demography↗
PubMed1992

U.S. census data uses.

"This article examines the principal applications of the statistics yielded by the 1990 U.S. Census of Population and Housing. Before doing so, however, a framework of census policy and operational features that directly influenced the content of the questionnaires will be outlined.... Having established this background, the uses of census data will be addressed, citing case examples in some instances, for...major groups of data users."

Americas↗
PubMed2002

[Idiopathic osteosclerosis in jaw bones. Clinical statistic study on a population of Sardinian origin].

BACKGROUND: Idiopathic Osteosclerosis are localized, non-expansive and asymptomatic areas of bone radio-opacity, whose aetiology is unknown. The aim of this study was to assess its frequency, and distribution according to its location and to patients' age and gender, in a sample of patients native in Sardinia. METHODS: 697 consecutive clinical records of patients who underwent odontological treatment at the Department of Odontostomatologic Sciences at Cagliari University, over a 10-year period were studied. The panoramic radiographs attached to the clinical records were examined and searched for all cases that showed radio-opacity areas in maxillary bones that could be identified as idiopathic osteosclerosis (IO). RESULTS: By examining orthopantomographies we have located 58 IOs. We found no significant differences between the sexes; average age was 37.8 years. The mandible has proved to be the most affected site (98.2%) in the first molar tooth region (34.5%), followed by the premolar teeth region (25.9%) and of the second molar tooth (15.5%). The lesions examined had an average diameter of 8.8 mm. CONCLUSIONS: IO frequency has proved to be slightly higher than that reported in other articles, though remaining significantly lower than the values reported in Eastern populations. From the clinical point of view, IOs have been identified as sporadic radiographic findings without any real pathological relevance, except for one case in which the lesion caused nervous compression and dental retention, so that it was necessary to administer specific treatment.

Adolescent↗