Studies reporting quantitative data on the effectiveness of a psychological-based intervention on primary hyperhidrosis were eligible for inclusion.
Of the included studies, two used cognitive therapy interventions, two biofeedback interventions and two a combination of relaxation with biofeedback. The outcome measures included skin conductance and sweating rates. The age range of the included participants was 16 to 53 years.
Two reviewers independently assessed studies for inclusion, with any disagreements resolved by consensus.