Figure 2
From: Ill or just old? Towards a conceptual framework of the relation between ageing and disease
![Figure 2](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F1471-2318-3-7/MediaObjects/12877_2003_Article_17_Fig2_HTML.jpg)
The distinction between component causes and sufficient causes Sufficient causes I and II have five component causes each and sufficient cause III has seven component causes. The component causes are depicted as A to J. All three sufficient causes share the component causes A and B, that can be interpreted as shared risk factors if the sufficient causes have distinct effects (adapted from Rothman, 1976 [9]).