Abstract:
BACKGROUND:Epidemiological inferences about the aetiology of a disease can often be made from its seasonal patterns. However, due to its multifactorial nature, the seasonality component can be obscured by other factors. It is therefore important to develop statistical techniques which are sensitive to minute temporal changes. METHODS:The Lorenz curve and the associated Gini index are applied for characterizing and testing seasonal variations. Computer simulations were conducted to compare the powers of the Gini test and other seasonality tests. We also show that the Gini index can itself be interpreted as a probability related to temporal clustering. RESULTS:The powers of the proposed tests are shown to be higher than or at least comparable to other tests under various conditions. CONCLUSIONS:Though computer-demanding, the proposed method is well-suited for analysing seasonal data.
journal_name
Int J Epidemioljournal_title
International journal of epidemiologyauthors
Lee WCdoi
10.1093/ije/25.2.426subject
Has Abstractpub_date
1996-04-01 00:00:00pages
426-34issue
2eissn
0300-5771issn
1464-3685journal_volume
25pub_type
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