90th percentile for women in the highest compared to the lowest BMI category ("obese class III" versus "underweight"). This estimate was OR = 4.55 and OR = 3.52, with two different multiple logistic regression models. When using the "normal weight" category as the reference, our corresponding estimates were OR = 2.03 and OR = 1.62, respectively. Moreover, our choice of reference category also gave narrower confidence intervals. Summary Due to several methodological drawbacks, categorisation should be avoided. Modern statistical analyses should be used to analyse continuous exposure data, and to explore non-linear relations. If continuous data are categorised, special attention must be given to the choice of reference category."/>
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Categorisation of continuous exposure variables revisited. A response to the Hyperglycaemia and Adverse Pregnancy Outcome (HAPO) Study

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Online attention

Altmetric score 9
  • 1 tweeters
  • 1 blogs
  • 65 Mendeley
  • 1 Citeulike

This article is in the 85th percentile (ranked 41,866th) of the 291,984 tracked articles of a similar age in all journals and the 86th percentile (ranked 18th) of the 124 tracked articles of a similar age in BMC Medical Research Methodology

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