A Database Model of Drug Usage in Pregnancy and Lactation According to User Information Requirements
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A DATABASE MODEL OF DRUG USAGE IN PREGNANCY AND LACTATION ACCORDING TO USER INFORMATION REQUIREMENTS RUTH HANDZEL Thesis submitted for the Degree of Doctor of Philosophy in the University of London University College London 1996 ProQuest Number: 10105731 All rights reserved INFORMATION TO ALL USERS The quality of this reproduction is dependent upon the quality of the copy submitted. In the unlikely event that the author did not send a complete manuscript and there are missing pages, these will be noted. Also, if material had to be removed, a note will indicate the deletion. uest. ProQuest 10105731 Published by ProQuest LLC(2016). Copyright of the Dissertation is held by the Author. All rights reserved. This work is protected against unauthorized copying under Title 17, United States Code. Microform Edition © ProQuest LLC. ProQuest LLC 789 East Eisenhower Parkway P.O. Box 1346 Ann Arbor, Ml 48106-1346 This thesis was prepared under the supervision of Professor R.C. Alston This work was supported by: The friends of the Hebrew University Jerusalem, in UK The Ben-Gurion Prize AGIS Industries Inc. Yad-Ora fund for research in Librarianship and Information Sciences ACKNOWLEDGEMENTS My thanks are given to my supervisors and those members of the staff of the School of Library, Archive and Information Studies, who helped me in this endeavour. to my family ABSTRACT The information needs of a population of gynaecologists and obstetricians concerning drug administration in pregnancy and lactation, were investigated, employing the triangulation approach. This involves the application of three analytical tools; content analysis, focus group interviews and a structured questionnaire. Content analysis was performed on queries submitted to two representative Drug Information Centres (DICs); the focus group interviews (FGIs) of gynaecologists and obstetricians were conducted in hospital departments; and the questionnaire was distributed among the majority of Israeli gynaecologists and obstetricians. The combination of complementary methods used constitutes a powerful tool for data assembly and for validation of conclusions. Statistical analysis of the results reveals a relation between information usage and background variables, such as country of study, place of work and teaching position. In addition, a relation was found between information usage and attitude towards drug administration. Based on this analysis, a typology of users' profile was drawn and their information needs defined. A scheme of the pattern of drug information usage was delineated, leading to the designing of a database model to meet the information requirements. Several drugs were selected to be included in the model, representing various pharmaceutical groups, different degrees of risk for the fetus and different amounts of available information about potential teratogenicity and toxicity. AskSam+ hypertext software was chosen to create the database due to its flexibility, ease of updating and enhanced text retrieval capability. Data are stored in a network of nodes connected through links. Each structured node contains all the information on a single drug: its names, risk factor, teratogenicity, fetal toxicity, mutagenicity and oncogenicity, all based upon and followed by a bibliographic list. These attributes are each assigned to a structural node and related hierarchically to body systems, organs and related pathology. The database is user friendly, allows rapid retrieval of information and is easily installed on a PC in the gynaecologists and obstetricians' office. This model can also be readily adapted to other medical disciplines, according to their specific needs. Table of contents 1 Introduction ............................................................................................ 13 1.1 Background for the Proj ect ...................................................................13 1.2 The Health System of Israel..................................................................17 1.3 Aims and Purposes .................................................................................19 2 Study Methodology ............................................................................... 20 2.1 The Population of Gynaecologists/Obstetricians under Study 20 2.2 The Triangulation Research Method ...................................................20 3 Content Analysis of Inquiries about Drugs ......................................... 22 3.1 Information Centres which Contributed the Inquiries ....................... 22 3.2 Categories of Questions........................................................................23 3.3 Facet Analysis - Criteria which Form the Content Units ...................23 3.3.1 Drug names............................................................................................24 3.3.2 Risk factors of drugs.............................................................................25 3.3.3 Pregnancy .............................................................................................26 3.3.4 Lactation .............................................................................................28 3.4 Conclusion .............................................................................................29 4 Focus Group Interview ..........................................................................30 4.1 Methodology..........................................................................................30 4.2 Summary and Analysis of Focus Group Interview ............................34 4.2.1 Problems requiring information ...........................................................34 4.2.2 Types of information requested ........................................................... 36 4.2.3 Situations in which information is required and the urgency in obtaining it ........................................................................ 38 4.2.4 Updating and follow-up ........................................................................38 4.2.5 Sources of information and their reliability ........................................ 39 4.2.6 Professionals whom the participants consult ......................................40 4.2.7 Persons who consult with the participants .......................................... 40 4.2.8 Requirements regarding a computerized data base ........................... 41 4.3 Conclusion .............................................................................................42 5 The Questionnaire ................................................................................. 43 5.1 Methodology ......................................................................................... 43 5.2 Structure and Content of Questionnaire ..............................................43 5.2.1 Pre-test of the questionnaire ................................................................ 44 5.3 The Population of Respondents ........................................................... 44 5.3.1 Characteristics of the population of the respondents ......................... 46 5.4 Statistical Analysis of the Results ........................................................47 5.4.1 The means for keeping up to date and the frequency of their use ....49 5.4.2 The relation between reliability and availability of information and the frequency of information use ............................51 5.4.3 The relation between information usage and attitudes toward drug administration ..................................................................51 5.4.4 The relation between the background variables and the usage of information .......................................................................................54 5.4.5 The relation between the attitude towards drug administration and the background variables ..............................................................59 5.4.6 A typology of physicians .......................................................................64 5.4.7 Information to be included in the database and its form of presentation ........................................................................................... 66 5.5 Conclusion .............................................................................................68 6 Drug Information Centres (DICs) ........................................................ 70 6.1 What Are DICs?.....................................................................................70 6.2 Beilinson Medical Centre .....................................................................71 6.3 Hadassa Medical Centre .......................................................................72 6.4 Sorasky Medical Centre ........................................................................ 73 6.5 Conclusion .............................................................................................74 7 Gynaecologists and Obstetricians User Studies and the Implications for the Database Model .................................... 75 8 The Database Model : ............................................................................79 8.1 Hypertext Software...............................................................................79 8.1.1 AskSam"*" .............................................................................................80 8.2 Hypertext Nodes ....................................................................................80 8.3 Hypertext Links ......................................................................................86 8.4