


5 A survey of British chiropractors reported 82% of respondents indicated they use an AAI, although only 2% of them stated they used it as their primary treatment method 6 and the NBCE 1994 7 reported that 72.7% and 54.3% of Australian and New Zealand chiropractors, respectively, used an AAI. The 1993 NBCE Job Analysis 3 reported roughly 40% of Canadian chiropractors use an AAI, although more recent estimates range from 31.4% 4 to 22%. According to the 2005 National Board of Chiropractic Examiner’s (NBCE) Job Analysis 1 51.2% of American chiropractors report using the AAI for patient care, although this data does not differentiate between those practitioners who use the AAI only (often as a substitute for HVLA manipulation) from those practitioners who use the Activator Methods Chiropractic Technique (AMCT), a technique system that involves a group of specialized diagnostic procedures during prone leg length checking.

With the notable exception of the manual Diversified technique, which involves high velocity and low amplitude (HVLA) thrusting spinal manipulative therapy (SMT) (also commonly referred to as spinal adjustments), the therapeutic intervention most commonly used for patient care by chiropractors is instrumented-adjusting using the Activator Adjusting Instrument (AAI).
