Background To investigate the effectiveness of chiropractic spinal manipulation versus sham manipulation in children aged 7-14 with recurrent headaches.
Methods Design: A two-arm, single-blind, superiority randomised controlled trial.
Setting: One chiropractic clinic and one paediatric specialty practice in Denmark
Participants: 199 children aged 7 to 14 years, who experienced at least one episode of headache per week for the previous 6 months and with at least one musculoskeletal dysfunction identified.
Interventions: All participants and parents received standard oral and written advice to reduce headaches. In addition, children in the active treatment group received chiropractic spinal manipulation and children in the control group received sham manipulation for a period of 4 months. Number and frequency of treatments were based on the chiropractor’s individual evaluation in the active treatment group, and the children in the control group received approximately eight visits during the treatment period.
Primary outcome measures: ‘Number of days with headache’, ‘pain intensity’ and ‘medication’ were reported weekly by text messages, and global perceived effect by text message after 4 months. A planned fixed sequence strategy based on an initial outcome data analysis was used to prioritize outcomes. ‘Number of days with headache’ and ‘pain intensity’ were chosen as equally important outcomes of highest priority, followed by global perceived effect and medication. The significance level for the first two outcomes was fixed to 0.025 to take multiplicity into account.
Results Chiropractic spinal manipulation resulted in significantly fewer days with headaches (reduction of 0.81 vs. 0.41, p=0.019, NNT=7 for 20% improvement) and better global perceived effect (dichotomized into improved/not improved, OR=2.8 (95% CI: 1.5-5.3), NNT=5) compared with a sham manipulation procedure. There was no difference between groups for pain intensity during headache episodes. Due to methodological shortcomings, no conclusions could be drawn about medication use.
Conclusions Chiropractic spinal manipulation resulted in fewer headaches and higher global perceived effect, with only minor side effects. It did not lower the intensity of the headaches.
Since the treatment is easily applicable, of low cost and minor side effects, chiropractic spinal manipulation might be considered as a valuable treatment option for children with recurrent headaches.
Trial registration ClinicalTrials.gov, identifier NCT02684916, registered 02/18/2016 – retrospectively registered. https://clinicaltrials.gov/ct2/show/NCT02684916

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This is a list of supplementary files associated with this preprint. Click to download.
Additional File 1, IODA report.pdf. The results of the initial outcome data analysis and the resulting decision report.
Additional File 1, IODA report.pdf. The results of the initial outcome data analysis and the resulting decision report.
Additional File 2, imputation.pdf. Tables showing results following imputation of data.
Additional File 2, imputation.pdf. Tables showing results following imputation of data.
Additional File 3, CONSORT 2010 Checklist.pdf. Full reporting check list including page numbers.
Additional File 3, CONSORT 2010 Checklist.pdf. Full reporting check list including page numbers.
Additional File 4, missing sms.jpg. Flowchart of SMS-reports.
Additional File 4, missing sms.jpg. Flowchart of SMS-reports.
Additional File 5, Tables.pdf. Additional information in tables.
Additional File 5, Tables.pdf. Additional information in tables.
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On 10 Dec, 2020
On 18 Nov, 2020
On 18 Nov, 2020
On 18 Nov, 2020
Posted 11 Nov, 2020
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On 27 Aug, 2020
On 13 Aug, 2020
On 13 Aug, 2020
On 12 Aug, 2020
On 10 Aug, 2020
On 10 Dec, 2020
On 18 Nov, 2020
On 18 Nov, 2020
On 18 Nov, 2020
Posted 11 Nov, 2020
On 03 Nov, 2020
On 02 Nov, 2020
On 02 Nov, 2020
Received 02 Nov, 2020
Received 02 Nov, 2020
Invitations sent on 01 Nov, 2020
On 29 Oct, 2020
On 29 Oct, 2020
On 29 Oct, 2020
On 30 Sep, 2020
Received 29 Sep, 2020
On 15 Sep, 2020
Received 28 Aug, 2020
Invitations sent on 27 Aug, 2020
On 27 Aug, 2020
On 13 Aug, 2020
On 13 Aug, 2020
On 12 Aug, 2020
On 10 Aug, 2020
Background To investigate the effectiveness of chiropractic spinal manipulation versus sham manipulation in children aged 7-14 with recurrent headaches.
Methods Design: A two-arm, single-blind, superiority randomised controlled trial.
Setting: One chiropractic clinic and one paediatric specialty practice in Denmark
Participants: 199 children aged 7 to 14 years, who experienced at least one episode of headache per week for the previous 6 months and with at least one musculoskeletal dysfunction identified.
Interventions: All participants and parents received standard oral and written advice to reduce headaches. In addition, children in the active treatment group received chiropractic spinal manipulation and children in the control group received sham manipulation for a period of 4 months. Number and frequency of treatments were based on the chiropractor’s individual evaluation in the active treatment group, and the children in the control group received approximately eight visits during the treatment period.
Primary outcome measures: ‘Number of days with headache’, ‘pain intensity’ and ‘medication’ were reported weekly by text messages, and global perceived effect by text message after 4 months. A planned fixed sequence strategy based on an initial outcome data analysis was used to prioritize outcomes. ‘Number of days with headache’ and ‘pain intensity’ were chosen as equally important outcomes of highest priority, followed by global perceived effect and medication. The significance level for the first two outcomes was fixed to 0.025 to take multiplicity into account.
Results Chiropractic spinal manipulation resulted in significantly fewer days with headaches (reduction of 0.81 vs. 0.41, p=0.019, NNT=7 for 20% improvement) and better global perceived effect (dichotomized into improved/not improved, OR=2.8 (95% CI: 1.5-5.3), NNT=5) compared with a sham manipulation procedure. There was no difference between groups for pain intensity during headache episodes. Due to methodological shortcomings, no conclusions could be drawn about medication use.
Conclusions Chiropractic spinal manipulation resulted in fewer headaches and higher global perceived effect, with only minor side effects. It did not lower the intensity of the headaches.
Since the treatment is easily applicable, of low cost and minor side effects, chiropractic spinal manipulation might be considered as a valuable treatment option for children with recurrent headaches.
Trial registration ClinicalTrials.gov, identifier NCT02684916, registered 02/18/2016 – retrospectively registered. https://clinicaltrials.gov/ct2/show/NCT02684916

Figure 1

Figure 1

Figure 2

Figure 2

Figure 3

Figure 3

Figure 4

Figure 4
This is a list of supplementary files associated with this preprint. Click to download.
Additional File 1, IODA report.pdf. The results of the initial outcome data analysis and the resulting decision report.
Additional File 1, IODA report.pdf. The results of the initial outcome data analysis and the resulting decision report.
Additional File 2, imputation.pdf. Tables showing results following imputation of data.
Additional File 2, imputation.pdf. Tables showing results following imputation of data.
Additional File 3, CONSORT 2010 Checklist.pdf. Full reporting check list including page numbers.
Additional File 3, CONSORT 2010 Checklist.pdf. Full reporting check list including page numbers.
Additional File 4, missing sms.jpg. Flowchart of SMS-reports.
Additional File 4, missing sms.jpg. Flowchart of SMS-reports.
Additional File 5, Tables.pdf. Additional information in tables.
Additional File 5, Tables.pdf. Additional information in tables.
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