Table 1 Inclusion and exclusion criteria with their respective time points
Inclusion criteria | Time point for checking* |
|---|---|
7–14 years old | 1 |
at least one episode of headache per week for at least half a year prior to the pre-treatment period | 2 |
At least one musculoskeletal dysfunction identified by the primary investigator as a movement restriction in one or more of the joints suitable for chiropractic manipulation treatment at the time of the initial screening. | 3 |
written informed consent from the holder(s) of custody | 1 |
a mobile telephone in the family and ability to report weekly headache data | 1 |
ability to read and speak Danish at an adequate level to comply with study requirements | 2 |
Exclusion criteria | |
contraindications for joint manipulation (Additional file 3) | 3 |
receiving any treatment by a health care professional for headache within the last three months. The only exception being prescription pain medication | 2 |
failure to report baseline data during four weeks prior to randomization | 2 |