Group-level symptom networks in depression

To the Editor About 8 years ago, network models entered the field of psychiatry.1 In this approach, psychiatric disorders are conceptualized as a dynamic interplay between symptoms over time, contrasting the traditional disease model of an underlying common cause. With the intention to describe how symptoms give rise to each other, the network approach would deal with processes taking place at the level of the individual.1 Nevertheless, almost all studies on networks have investigated this phenomenon at the group level.