1028 people were involved in this study.  They all had some form of allergies (most common was atopic dermatitis and bronchial asthma).

Their X-ray and physical exam findings showed that 98% of the 1028 people had similar vertebral misaligments in their mid back.

Over 88% of the people with dermatitis who recieved consistent spinal adjustments showed massive improvement in skin itching.  Over 71% showed improvement in overall skin condition.

Compare that to 0% improvement of the patients who did not receive adjustments.

Y Takeda, S Arai. Relationship Between Vertebral Deformities and Allergic Diseases.  The Internet Journal of Orthopedic Surgery. 2003 Volume 2 Number 1