Infantile colic is a condition that affects more than 10% of babies and their families. The reason, and hence the proper treatment, for this condition is unknown and many causes have been suggested. One of the treatments that parents choose is chiropractic manipulation. In Denmark, around 4,000 babies are treated for colic by chiropractors each year although the effect of chiropractic treatment of infantile colic has not been properly scientifically evaluated.

The effect of chiropractic treatment on infantile colic needs to be investigated since this is a very common disorder with no known effective treatment but with good empirical evidence of the value of chiropractic treatment. Although it is usually considered to be a benign and self-limiting condition, some studies suggest there might be long-term effects in terms of psychomotor problems. In worst case, the infants' crying may also lead to violence and 'shaken baby syndrome'.

Null hypothesis: There is no effect of chiropractic treatment on the course of infantile colic.

This study is a controlled clinical trial, where infants fulfilling the diagnostic criteria for colic will be randomized into two groups. One group will receive treatment and the other won't. This will determine the overall effect and furthermore, subgroup analyses will be performed to identify possible subgroups of infants who will benefit the most from the treatment.

The results from subgroup analyses can help to identify children who might benefit from the treatment. Then treatment can be initiated early and a lot of hardship can be avoided for both the babies and the families.