Colic, Rule-of-three

… also described as the "Wessel's criteria".

The Wessel's criteria are a rule formerly used for the diagnosis of infantile colic and describes that crying for more than three hours per day, for more than three days per week, for more than three weeks (for an otherwise well-fed and healthy infant) was considered colic. The rule was replaced by the introduction of Rome criteria (Zeevenhooven et al. 2018).