I think he addressed it to the Canadian Chiropractic Association.
Lower back pain is incredibly prevalent in our society and generally starts in middle age, often occupationally, and can continue in a chronic manner. Geriatric lower back pain, or back problems, can have many different types of etiology.
As for effectiveness with respect to treatment from chiropractic spinal manipulative therapy, the way one treats different conditions varies depending upon the general health of the individual. I'd say that the longer the condition is in existence in the individual, the more the treatment becomes one of management, as opposed to curative.
Very often in a senior, if you can extend the independence of an individual or their ability to enjoy their life—and at a younger age to continue with their work—that's success. And chiropractic has an excellent record with back pain and back function.