Summary
A suitable model when two random variables take values on a cylinder is proposed and its main properties are discussed. The maximum likelihood estimators for the parameters of the model are obtained and a likelihood ratio test of independence is derived. A numerical example is given.
The attitudes of qualified nursing staff towards the nursing process were studied. Three distinct nursing units received varying degrees of planning and education regarding the principles and practice of the nursing process. The attitudes of the nursing staff of these units were assessed by means of a 20-item questionnaire. Statistically significant differences (P less than 0.001) between the mean attitude scores for the three units were found, but comparison of the overall mean attitude scores for the three grades of nurses within each unit did not result in statistical significance (P greater than 0.35). Further analysis indicated that a structured educational programme was beneficial in creating a positive attitude towards the nursing process whereas a less structured approach had the opposite effect.
Anxiety was studied on four occasions over one year in 76 men under 66 years of age, who were admitted to hospital with a first acute myocardial infarction. Anxiety was measured by the Spielberger State-Trait Anxiety Inventory, and by a self-rating questionnaire. Average levels of State and self-rated anxiety fluctuated over the study period with levels peaking after admission, falling at the fifth day, rising at six weeks, and falling to their lowest level at one year. Reported specific sources of anxiety, including the myocardial infarction, return to work, the future and possible complications, ranked highest in hospital and at six weeks post-discharge.
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