Biostatistics Commons^™

An Extension Of The Cochran Q Test, Soo-Young Cho

Loma Linda University Electronic Theses, Dissertations & Projects

The familiar x ² test is ordinarily used to compare percentage distributions of categorical data for two or more independent samples. A more accurate com parison of the percentages is sometimes obtained if the samples consist of matched individuals. The NcNemar test is generally used when comparing only two related samples. Where there are three or more samples the Cochran Q test is used. Both of these tests apply only to the case of dichotomized responses. This thesis extends the Cochran Q test to the case where the responses are multinomial. A generalized statistic corresponding to Cochran's result is obtained. …

Relationship Of Ventilation Ability And Positioning In Left-Sided Congestive Heart Failure Patients, Nancy E. Carson

Loma Linda University Electronic Theses, Dissertations & Projects

Proper positioning is used to relieve dyspnea, edema, and fatigue in congestive heart failure patients. According to the review of literature, improved ventilation as measured by specific lung volumes and lung mechanics occurred with upright positioning in normal persons. The effects of specific changes in lung volumes related to position change in congestive heart failure patients has not been documented in literature, although various recommendations related to positioning are made. This exploratory study was undertaken with nine congestive heart failure patients to see if a relationship existed between degree of head elevation and lung ventilation ability as measured by water-bell …

Group Sequential Methods For Clinical Trials Applied To The Logistic Regression Model, Joy Duci Mele

Theses and Dissertations

The objectives of this thesis are

1. to provide a comprehensive guide to using Pocock's group sequential method for clinical trials and

2. to show by computer simulations that the group sequential method is appropriate when using the logistic regression model.

In section 1.2, clinical trials are defined with an emphasis on Phase III clinical trials. The primary intent of sections 1.2 and 1.3 is to describe clinical trial characteristics which suggest that interim analyses are desirable. In section 1.4, it is shown that interim analyses should not consist of performing the usual significance tests. Chapter 1, then, describes the …

A Study To Demonstrate The Immediate Destination Of An Embolus Formed In The Lumen Of A Peripheral Venous Catheter, Rosemarie Morikone Emori

Loma Linda University Electronic Theses, Dissertations & Projects

This study was designed to show the immediate destination of an embolus formed in the lumen of an intravenous catheter placed in a peripheral vessel. The hypothesis stated that clots injected into a peripheral vessel will lodge in the lungs. A subhypothesis was that the clot may lodge anywhere along the circulatory pathway.

Indications of need for the study as shown by the review of literature were the following: (1) the complications resulting from the frequent use of intravenous polyethylene catheters, (2) experimental studies that showed that clots were formed around intravenous catheters, (3) the evidence that intravenous catheters predispose …

Roentgenographic Evaluation Of Nasion-Menton And Sella-Gonion Measurements And Their Relationship To The Mandibular Plane Angle, David I. Asatani

Loma Linda University Electronic Theses, Dissertations & Projects

A convenience sample of 480 Caucasians using original diagnostic cephalometric films was selected to evaluate the nasion-menton and sella-gonion distances and their relationship to the mandibular plane angle.

The anterior facial height was represented by the nasion-menton plane. The posterior facial height was represented by sella-gonion plane. The facial depth was represented by sella-nasion and menton-gonion planes. The mandibular plane angle was represented by the intersection of the sella-nasion and menton-gonion planes.

The descriptive data, correlation analysis, and regression analysis was calculated for the following groups: total sample, females, males, prepubertal and postpubertal ages and various mandibular plane angles of …

The Extent To Which Patients Follow Their Low-Cholesterol Diets, Beverly Jo Peterson

Loma Linda University Electronic Theses, Dissertations & Projects

This exploratory study was conducted to discover to what extent patients follow their low-cholesterol diets. If they did not, the reasons were investigated. It was hoped that the findings would aid in defining areas of instruction which need greater emphasis when patients receive instruction concerning a low-cholesterol diet.

An interview guide was used as a data gathering tool. The dietitians at one private teaching hospital recorded all dietary prescriptions sent to them during the specified period and ten physicians were contacted for permission to include their patients in the study. The patients were then contacted by telephone and the interviews …

A Study Of The Effect Of Varying Serum Phenylalanine Levels On Changes In Intelligence Quotient, Darlene Imai Manullang

Loma Linda University Electronic Theses, Dissertations & Projects

Data from thirty medical records of phenylketonuric children under treatment were investigated to determine at which serum phenylalanine level (0-3.9 mg. %, 4-7.9 mg %, 8-11.9 mg. %, greater than 12 mg. %) there would be the greatest increase in intelligence. The children involved in the study were divided into the following groups according to the age dietary treatment was initiated: 0 through 5 months, 6 through 11 months, 12 through 23 months, and over 2 years of age.

Among 6 patients who were placed on the diet during the first 5 months of life, it appears that the optimal …

The Relationship Of Central Venous Pressure To Hemorrhage In Open Heart Surgery, Mable Reynolds

Loma Linda University Electronic Theses, Dissertations & Projects

The problem of this study was to review 100 open heart surgical cases in a selected hospital to determine the changes occurring in central venous pressure in relation to blood loss.

The review of literature revealed that central venous pressure is an important factor in determining immediate postoperative care of open heart surgical patients. If central venous pressure falls below the normal range of 5 to 10 centimeters of water, hemorrhage is suspected. If central venous pressure is elevated between 15 and 20 centimeters of water, cardiac tamponade is suspected.

The descriptive survey method of research was used. Medical records …

The F.A.Q. Standard For 1962-63, Department Of Agriculture, Western Australia

Journal of the Department of Agriculture, Western Australia, Series 4

THE term f.a.q. refers to "fair average quality" as a standard for the sale of wheat -*- produced in Western Australia during any particular season.

The practice of using this standard developed after a standard sample of wheat grown in 1904 was obtained and declared to have a bushel weight of 62 lb.