INTRODUCTION This article summarizes the contribution of epidemiology to the understanding of childhood asthma. The first task in epidemiology is to determine prevalence and incidence of any disease. PREVALENCE Epidemiological investigations are aimed at evaluating hypotheses about causes of disease by defining demographic characteristics of a certain population as well as by determining poss...

Following the launch of a publicly funded influenza immunization program for all residents of Ontario over the age of 6 months, we evaluated 203 parents of children who presented to our emergency department between January and March of the following year (2001). Overall, 54 (27%) of the children had been vaccinated. Parents of non-immunized children were more likely to believe that immunization...

Neville, A. M. and Laurence, D. J. R., eds. (1974). Report of the Workshop on the carcinoembryonic antigen (CEA): the present position and proposals for future investigation. Int. J. Cancer, 14, 1-18. Norgaard-Pedersen, B. (1976). Personal communication. N0rgaard-Pedersen, B., Albrechtsen, R., and Teilum, G. (1975). Serum alpha-foetoprotein as a marker for endodermal sinus tumour (yolk sac tumo...

It is regrettable that although the incidence of fatal coronary heart disease on the other side of the Atlantic and in Australia is falling, the toll here, even if not increasing at the great pace of the 'fifties and 'sixties, is only just beginning to level off. Few of us can afford to be complacent, and we as paediatricians have a duty to sow the seeds of longevity in our patients. For these ...