Osterhaus 1997.
| Study characteristics | ||
| Methods | RCT. 2 arms. Assessed at pretreatment, post‐treatment and 1‐year follow‐up | |
| Participants | End of treatment: n = 39, 1‐year follow‐up: n = 21 Start of treatment: n = 39 Sex: 29 F, 10 M Mean age = 15.2 years (SD 3.3) Source = newspaper article Diagnosis = headache (migraine, tension‐type, mixed) Mean years of pain = 5.6 |
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| Interventions | "Behavioural treatment package" "waiting‐list control" | |
| Outcomes | Primary pain outcome: headache index Primary disability outcome: none Primary depression outcome: none Primary anxiety outcome: none
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| Notes | COI: not reported. Funding: "This study was supported by Iht: Dutch Fund for Menial Hcalqh (NFGV)." |
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| Risk of bias | ||
| Bias | Authors' judgement | Support for judgement |
| Random sequence generation (selection bias) | Unclear risk | "The participants were randomly assigned to one of two groups" Comment: probably done, no method described |
| Allocation concealment (selection bias) | Unclear risk | No description found in text Comment: probably not done |
| Blinding of outcome assessment (detection bias) All outcomes | Unclear risk | No description found in text Comment: probably not done |
| Incomplete outcome data (attrition bias) All outcomes | High risk | Attrition was not described |
| Selective reporting (reporting bias) | Low risk | Data were fully reported |