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. 2010 Sep 28;103(7):1128–1135. doi: 10.1038/sj.bjc.6605838

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Copyright © 2010 Cancer Research UK

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Nonparametric estimates of trend in log odds of being a case with a range of levels of smoothing (A. 2 d.f.; B. 3 d.f.; C. 4 d.f.; D. 5 d.f.) from a generalised additive model, with adjustment for study, age of diagnosis and sex. Outer dotted lines represent 95% confidence limits.