Abstract:
STUDY OBJECTIVE:A statistical test that allows for adjustment of confounding can be helpful for the study of seasonal patterns. The aim of this article is to supply a detailed description of such a method. An example of its application is given. DESIGN:A statistical test is presented that retains the information on the connection of time periods by describing the seasonal pattern as one sine and one cosine function. Such functions can be included into a regression model. The resulting form of the seasonal pattern follows a cosine function with variable amplitude and shift. MAIN RESULTS:The test is shown to be applicable to test for seasonality. Not only one cosine function per time period, but also a mixture of cosine functions can be used to describe the seasonal pattern. Adjustment for confounding effects is possible. CONCLUSIONS:This method for studying seasonal patterns can be applied easily in a regression model. Adjusted prevalences and odds ratios can be calculated.
journal_name
J Epidemiol Community Healthjournal_title
Journal of epidemiology and community healthauthors
Stolwijk AM,Straatman H,Zielhuis GAdoi
10.1136/jech.53.4.235keywords:
subject
Has Abstractpub_date
1999-04-01 00:00:00pages
235-8issue
4eissn
0143-005Xissn
1470-2738journal_volume
53pub_type
杂志文章abstract:BACKGROUND:We examined whether higher effort-reward imbalance (ERI) and lower job control are associated with exit from the labour market. METHODS:There were 1263 participants aged 50-74 years from the English Longitudinal Study on Ageing with data on working status and work-related psychosocial factors at baseline (w...
journal_title:Journal of epidemiology and community health
pub_type: 杂志文章
doi:10.1136/jech-2014-205148
更新日期:2015-06-01 00:00:00
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更新日期:2001-04-01 00:00:00
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pub_type: 杂志文章,随机对照试验
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更新日期:2014-12-01 00:00:00
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更新日期:2014-04-01 00:00:00
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pub_type: 杂志文章,多中心研究
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更新日期:2004-12-01 00:00:00
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pub_type: 杂志文章
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pub_type: 杂志文章
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更新日期:2013-01-01 00:00:00
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pub_type: 杂志文章
doi:10.1136/jech.2009.091959
更新日期:2011-02-01 00:00:00
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pub_type: 杂志文章,评审
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journal_title:Journal of epidemiology and community health
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journal_title:Journal of epidemiology and community health
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更新日期:2010-08-01 00:00:00
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更新日期:1992-02-01 00:00:00
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pub_type: 杂志文章
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更新日期:2020-03-01 00:00:00
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更新日期:2016-06-01 00:00:00
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更新日期:2006-12-01 00:00:00