[Exploration of a third degree atrioventricular block by standard echocardiography, tissue Doppler imaging, and treatment with a cardiac pacemaker in a German wire-haired pointer]. / Exploration d'un bloc atrio-ventriculaire du 3ème degré par échocardiographie conventionnelle, Doppler tissulaire, biopsie endomyocardique et traitement par pacemaker chez un Drathaar.

A nine-year-old intact male Drathaar was evaluated for syncope and extreme weakness, and was found to have a third degree atrioventricular (AV) block. As there were no biochemic, serologic, organic (thoracic radiographs, abdominal echography, standard and tissue Doppler echocardiographies) and histologic (interventricular septum biopsy) anomalies, the dog was treated with a permanently implanted cardiac pacemaker.

Analysing attitude data through ridit schemes.

PIP: The attitudes of individuals and populations on various issues are usually assessed through sample surveys. Responses to survey questions are then scaled and combined into a meaningful whole which defines the measured attitude. The applied scales may be of nominal, ordinal, interval, or ratio nature depending upon the degree of sophistication the researcher wants to introduce into the measurement. This paper discusses methods of analysis for categorical variables of the type used in attitude and human behavior research, and recommends adoption of ridit analysis, a technique which has been successfully applied to epidemiological, clinical investigation, laboratory, and microbiological data. The ridit methodology is described after reviewing some general attitude scaling methods and problems of analysis related to them. The ridit method is then applied to a recent study conducted to assess health care service quality in North Carolina. This technique is conceptually and computationally more simple than other conventional statistical methods, and is also distribution-free. Basic requirements and limitations on its use are indicated.^ieng

Socio-economic and urbanization profiles of internal migration in Egypt: a canonical correlation analysis.

"Data on in- and out-migration in Egypt by governorate and on variables believed to interact with migration are examined. The purpose is to identify the dimensions through which the basic demographic phenomenon can be rationally structured. This objective is approached through a general multivariate analysis technique known as canonical correlation analysis....A number of variables believed to act as determinants of migration are used and arbitrarily classified into four groups to represent four distinct migration profiles, namely, sociodemographic, economic, urbanization, and health profiles.... The analysis shows that the economic profile of migration is the most pronounced one of the four profiles examined."

Pregnancy wastage among Egyptian females: a failure rate model.

PIP: Data on duration of pregnancy prior to abortion (loss during the first 6 months) or stillbirth (loss after 7 or more months of pregnancy) from a national demographic survey undertaken in Egypt in 1980 (of 12,749 pregnancies, 1378 ended in abortion and 293 in stillbirth) were analyzed in the context of hazard function (failure rate) models. Such models are generally used in demography to estimate statistical properties of distributions. This report describes the concepts of life time distribution and related functional forms. It then describes the fitting method used (the hazard plotting method which provides a simple graphical means for obtaining estimates of distributions of time to failure data with different failure models). After discussing the method application and findings, the report ends with information on parameters estimation and goodness of fit testing.^ieng

Cultivar x environment interactions in sorghum, Sorghum bicolor (L.) moench.

The most significant and important interactions in 2, and 3-year sorghum zonal trials were location x year, cultivar x location and cultivar x location x year. Cultivar x year interaction was significant in one out of four ecologic zones used in the trials. The variance components were relatively small with the second order interaction variance component larger than the first order types involving cultivars. Environmental variance was the largest in all four zones.Computations on theoretical standard error of cultivar means suggest that six replications, eight locations and four years is an ideal testing procedure in the Northern Guinea Savanna, while in the Sudan Savanna, the combination is better with four replications, eight locations and three years. The true value or performance of a variety is most effectively obtained by increasing the number of years, while increasing number of replications is the least effective.

Population aging in Egypt: past and future trends.

PIP: Population aging, changes in the proportion of old to young people, and the mechanisms of these changes were studied in Egypt between 1917 and 1960. Between 1917 and 1947 the proportion of young children remained the same; by 1960 it had increased by 4%. The percent of old people decreased from 5% to 3% in 1917 to 1947. It was concluded that there was no clear trend for the aging of the population in Egypt during the study period. Possible future trends are evaluated, and the predictions vary with the assumptions made about the population. Decling fertility was predicted to cause larger changes in age composition than the effects of declining mortality.^ieng