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[Survival in colorectal cancers in population statistics].

Available population based survival statistics for colorectal cancers were compared. The results based on relative survival rates showed similar data in Finland, Norway, Geneva and Cote d'Or. The survival rates were lower in Great Britain and Iceland. Several factors complicate survival comparisons: age, exact localization of the tumour, definitions and distribution of tumour stages. Adjustment of these factors is necessary. If their definitions differ, no conclusion can be based upon the data. Population based survival figures provide public health authorities with a basis for monitoring cancer patient care. They are also useful for assessing the resources required for cancer treatment, follow-up and rehabilitation. They provide clinicians with survival data for reference.

Adult

The problem of pressure sores in a nursing home population: statistical data.

This study on 93 patients was conducted at a skilled nursing facility. Twenty-two of the 93 patients had pressure sores; 34 of the 54 sores were present when the patients were admitted and 20 developed after admission. Only 5 of the 54 sores healed. Healing times ranged from 15 to 55 days after the beginning of treatment. Thirteen deaths occurred among the 71 patients without sores, and 17 deaths among the 22 patients with sores. Specific treatment regimens varied (cleaning solutions, antimicrobial drugs, heat, enzymatic debridement) but always included frequent changes in the position of the patient. Ten of the 22 patients with sores were anemic vs. 19 of the 71 patients without sores. Half of the patients with sores were maintained with tube feedings whereas more than half of the patients without sores received regular house diets. Pressure sores are a serious problem among geriatric patients in nursing homes. All those who care for the aged should be fully aware of the procedures involved in the prevention and management of these sores.

Adult

[Structural analysis of populations : new statistical approach to the problem of age in Squilla mantis (Crustacea Stomatopoda)].

Thirty-three male length-frequency samples are analysed first by a multivariate procedure. The evolutionary cycles are pointed out by the interpretation of the first two components. The simulation model is built up on the basis of factorial analysis. The assessment of age classes parameters (mean, standard deviation, percentage) is then carried out by the simulation of data. Their configuration with respect to the two components points out the proximity of the observed and generated samples and shows the value of the statistical model.

Age Factors

Statistical analysis of population screening.

Statistical techniques used for the evaluation and monitoring of screening tests and screening programmes are reviewed. Though many differences exist between screening to prevent congenital abnormalities, and screening to prevent death from chronic disease, the two are considered together. Analysis for other instances of medical screening will be conceptually similar to one or other of these.

Biometry

Variances of the average numbers of nucleotide substitutions within and between populations.

Statistical methods for computing the variances of nucleotide diversity within populations and of nucleotide divergence between populations are developed. Both variances are computed by finding the phylogenetic relationships of the DNA sequences studied through the unweighted pair-group method or some other tree-making method. The methods developed are applicable to both DNA sequence and restriction-site map data.

Animals

[Dermatoglyphic characteristics of the Czech population].

Statistical processing of results obtained from dermatoglyphic digital patterns of the Czech population--110 women and 130 men of a reference group--revealed the tendency of more complex pattern formation in men and a tendency of simple pattern formation in women. As regards the frequency of vortices, the differences are significant at the 1% level (in men they form 24.15% patterns, while in women 14.27%). There is also a significant difference in the ratio of arches (1% level of significance)--frequency in men, 5.85%, is lower than in women--11.69%. In the general evaluation the ulnar loops differ only at the 5% level of significance (in men 58.85% and in women 63.18%). The frequency of radial loops and double loops differ insignificantly. The results indicate a greater trend of asymmetrical patterns in men than in women. In investigations of the sexual dimorphism the attained numbers of statistical differences differ by fingers--the most widely different values are recorded in the index fingers and the least different ones in the middle fingers. The number of statistical differences by sex differs also by patterns: most in vortices and arches and least in double loops.

Czechoslovakia

Cardiovascular risk factor characterisation of women in the community of Strömstad, Sweden, compared with other female populations.

Statistics on the community level have revealed an increased mortality from cardiovascular diseases, especially stroke, among women in the community of Strömstad situated in the northern part of the County of Göteborg and Bohus near the Norwegian border. Based on prevalence data from a population study in Strömstad, to which all women aged 45-64 were invited and 86% attended, it was, however, concluded that history of cardiovascular diseases including stroke were not more common in Strömstad than in Gothenburg and Copenhagen. Traditionally accepted risk factors could not explain an increased mortality from these diseases in Strömstad, as these factors did not differ between Strömstad and a number of other communities, with which Strömstad was compared. It seems reasonable also to take other factors into consideration in order to explain the increased mortality, e.g. socio-economic factors and softness of the drinking water.

Blood Pressure

The major causes of death in the Army and comparisons with the civilian population.

Statistics of 881 British Army male non-operational deaths between 1980 and 1984 were analysed and comparisons made with civilian mortality for certain categories of deaths. Disease accounted for 32% and injury for 68% of the deaths. Road traffic accidents (RTAs) comprised 40% and ischaemic heart disease (IHD) 13% of the total. The overall Standardised Mortality Ratio (SMR) was 92. By comparison with the UK civil population serving members of the Regular Army suffered considerably less from disease deaths (SMR 58) with the exception of IHD (SMR 92), but more from injury deaths (SMR 135). RTA deaths had an SMR of 200. The review suggests that attention should be directed towards incidents causing RTAs and drowning. Action taken in peace may have relevance to survival on operations.

Accidents, Traffic

A proportionate mortality study of granite cutters.

Several recent studies (animal and human) have suggested an association between lung cancer and silica exposure. To test the hypothesis, we have studied death benefit records of 1,905 members of the Granite Cutters Union. A proportionate mortality analysis (PMR) was conducted, using U.S. deaths as a comparison population. Statistically (PMR) was conducted, using U.S. deaths as a comparison population. Statistically significant excesses were observed for death from nonmalignant respiratory significant excesses were observed for death from nonmalignant respiratory disease (largely silicosis) (183 obs, 43.7 exp) and for tuberculosis (largely silicotuberculosis) (262 obs, 19.3 exp). Other significant excesses were observed for bone cancer (6 obs, 1.9 exp) and arthritis (5 obs, 1.5 exp). A significant decrease was observed for leukemia (5 obs, 13.0 exp). For lung cancer a slight but nonsignificant excess was observed (97 obs, 81.1 exp, PMR = 1.19, 95% CI 0.97-1.46). A proportionate cancer mortality analysis (PCMR) showed similar results for lung cancer (PCMR = 1.09, 95% CI 0.89-1.33). Lung cancer mortality also failed to show any trend with either calendar time or duration of exposure. Although no significant excess of lung cancer was observed for the entire silica-exposed cohort, there was an indication that those who were silicotic had an excess risk of lung cancer, based on a review of contributing causes on the death certificate.

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