Fig. 1From: On the use of the outcome variable “small for gestational age” when gestational age is a potential mediator: a maternal asthma perspectiveDirected acyclic graphs for the Basic Scenarios 1–4. From top to bottom, Basic Scenario 1: Null effect of ICS on BW; Basic Scenario 2: Indirect effect of ICS on BW; Basic Scenario 3: Direct effect of ICS on BW; Basic Scenario 4: Direct and indirect effects of ICS on BWBack to article page