Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Headache scores
[12] RCT 4-armed trial	203 adults In review [10]	Headache index score 6 months with stress management with tricyclic antidepressants Absolute results not reported	MD –0.13 95% CI –0.61 to +0.35		Not significant
[10] Systematic review	Adults with tension-type headache diagnosed using IHS criteria[17]	Clinically important improvement (50% or more reduction in headache index score) with stress management with tricyclic antidepressants Absolute results not reported	RR 1.09 95% CI 0.65 to 1.82		Not significant