摘要:

Abstracts of papers given at the Second Annual Meeting, Birmingham, Alabama, June 1989 (* denotes person presenting abstract, (0) indicates oral presentation)

ISSN:0269-5022    

DOI:10.1111/j.1365-3016.1990.tb00608.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

ISSN:0269-5022    

DOI:10.1111/j.1365-3016.1990.tb00610.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

ISSN:0269-5022    

DOI:10.1111/j.1365-3016.1990.tb00611.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

ISSN:0269-5022    

DOI:10.1111/j.1365-3016.1990.tb00612.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

ISSN:0269-5022    

DOI:10.1111/j.1365-3016.1990.tb00613.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

ISSN:0269-5022    

DOI:10.1111/j.1365-3016.1990.tb00614.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

摘要:

Summary.Logistic regression is a statistical modelling technique which may be applied to estimate the simultaneous effect of a set of predictors (e.g. gestational age, birthweight) on the risk of a certain outcome variable (e.g. neonatal death) which can take either one of two possible values (yes/no, alive/dead) or in the situation where one wants to estimate the effect of a particular risk factor (e.g. sex) while adjusting (correcting) for the effect of other risk factors (eg. gestational age). Since this situation often occurs both in medical or epidemiological research and in daily practice it is important to have a flexible and readily interpretable technique to predict risk of mortality and morbidity. Since the logistic regression technique is a powerful and widely applicable tool which is appearing more and more often in the epidemiological literature, a basic understanding of this technique becomes necessary for the clinical researcher. In this paper we explain logistic regression to medical researchers who do not have any particular statistical background. Part 1 covers the basic concepts. Part 2 will describe the actual representation of the basic concepts in a logistic framework.

ISSN:0269-5022    

DOI:10.1111/j.1365-3016.1990.tb00615.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

ISSN:0269-5022    

DOI:10.1111/j.1365-3016.1990.tb00616.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

摘要:

Summary.The postneonatal mortality rate in three southern regions of New Zealand was 8.1 per 1000 live births for 1979–1984. The possibly preventable postneonatal mortality rate was 7.1 per 1000 live births and data on 377 possibly preventable deaths and 936 randomly selected controls were used to develop a two‐stage risk‐scoring system. Logistic regression analysis was undertaken separately on two sub‐samples of the total sample. The data were used to evaluate three other previously published scoring systems. The four variables used in our birth score (mother's age, parity, marital status, and birth weight) have all appeared in other scoring systems, and this score could identify a group of infants in southern New Zealand with an estimated 1.7% mortality rate in the first year of life. It is suggested that currently the only valid use of risk‐scoring in this region is for the definition of a high‐risk population for the purpose of evaluating potential intervention

ISSN:0269-5022    

DOI:10.1111/j.1365-3016.1990.tb00617.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

摘要:

Summary.The development of secondary enuresis was examined in a birth cohort of New Zealand children studied to the age of 10 years. By this age, 7.9% of children had developed secondary enuresis. Analysis suggested two risk factors were involved in secondary enuresis. First, children who were late to attain nocturnal bladder control had significantly higher risks of secondary enuresis than children who attained early nocturnal bladder control. Secondly, the child's level of exposure to adverse life events was associated with the onset of secondary enuresis. Children who attained bladder control after 5 years were 3.39 (1.76–6.56) times more likely to develop secondary enuresis than those who attained bladder control before the age of 3 years (P<0.001); children who were exposed to four or more life events in a given year were 2.56 (1.18–5.50) times more likely to develop secondary enuresis in that year (P<0.05). These results suggest that the rate at which the child acquires primary bladder control acts as a vulnerability factor which determines the child's susceptibility to developing secondary enuresis when exposed to str

ISSN:0269-5022    

DOI:10.1111/j.1365-3016.1990.tb00618.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY