## Table 3 |
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Structural features that indicate different dependence types between the variables |
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Relation |
Abbreviation |
Graphical |

Pairwise features |
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Direct causal relevance | DCR(X,Y) | There is an edge between X and Y |

Transitive causal relevance | TCR(X,Y) | There is directed path between X and Y |

Confounded relevance | ConfR(X,Y) | X and Y have common ancestor |

Association | A(X,Y) | DCR or TCR or ConfR |

Pure interactionist relevance | PIR(X,Y) | X and Y have common child |

Strong relevance | SR(X,Y) | PIR or DCR |

Relevance of variable sets |
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Strong relevance | MBS(Y) | The set consisting of Y’s parents, its children, and the other parents of its children (the Markov Blanket Set of Y) |

Interaction models of relevant variables |
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Strong relevance | MBG(Y) | The subgraph that includes the nodes in the MBS and the incoming edges into Y and into its children (the Markov Blanket Subgraph of Y) |

Lautner-Csorba * et al.*

Lautner-Csorba * et al.* *BMC Medical Genomics* 2012 **5**:42 doi:10.1186/1755-8794-5-42