Comparing the Salzmann Index to automatic qualifying conditions when selecting medically necessary orthodontic...

Area of Science:

• Orthodontics
• Health Services Research
• Public Health Policy

Background:

• Medically Necessary Orthodontic Care (MNOC) eligibility in Pennsylvania is determined by the Salzmann Index (SI) score (≥25) or Automatic Qualifying Conditions (AQC).
• The SI and AQCs represent different criteria for assessing orthodontic treatment need.
• This study evaluates the concordance between these two methods for patient selection.

Purpose of the Study:

• To compare the patient selection outcomes of the Salzmann Index (SI) versus the American Association of Orthodontists' Automatic Qualifying Conditions (AQC) for medically necessary orthodontic care (MNOC).
• To determine if the SI and AQCs identify the same patient cohort for orthodontic treatment eligibility.
• To assess the potential impact of replacing the SI with AQCs on patient access to Medicaid-funded orthodontic care.

Main Methods:

• Retrospective analysis of orthodontic records for 139 participants aged 10-17 years.
• Calculation of Salzmann Index (SI) scores for all participants.
• Identification of the presence of any Automatic Qualifying Conditions (AQC) for each participant.
• Application of McNemar's test of agreement to compare patient selection by SI versus AQC.

Main Results:

• Only 8.6% of patients met the SI threshold (≥25) for treatment, while 31.7% had at least one AQC.
• A significant discrepancy was observed: only 11 of the 44 patients with AQCs also met the SI criteria (P < 0.001).
• The SI and AQC methods selected significantly different patient groups for orthodontic treatment needs.

Conclusions:

• The Salzmann Index and Automatic Qualifying Conditions are not interchangeable for determining orthodontic treatment eligibility.
• Implementing AQCs exclusively could substantially change the landscape of patient access to Medicaid-funded orthodontic care in Pennsylvania.
• Further evaluation is needed to understand the clinical implications of these differing selection criteria.