In families who have experienced sudden infant death, other risk factors can be used to predict the possiblity of subsequent sudden infant deaths.  Here.

I found this a hard one to read and understand.

I think it says this:

• the majority of children who have sudden infant death will have what we already understand as risk factors
• it wouldn’t be surprising then, that the risk of having a second sudden infant death would be higher than in the overall population; this is particularly true if you look at risk factors which are hard to modify like socioeconomic status.
• the risk of a second sudden infant death in patients with fewer risk factors – especially those from higher socioeconomic backgrounds – will be lower
• these authors have developed a model to look at this.

Obviously there are quite a few important implications for this, although the authors are very careful to point out that this works on a population level, but not on an individual level; it could not be used, for example, in a court case.