Overview & Efficacy: A relatively large, controlled study by Lehrer et al (2004) showed that biofeedback can have a highly significant impact on the severity of asthma related symptoms. Small clinical studies have also shown positive effects of biofeedback.

This therapy is rated as probably efficacious (level 3 on a scale of 1 - 5 with 5 being the best).

For more information on how efficacy is rated click here.

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