Table 2: Scalar Questionnaires for Balance Assessment

Instrument Components Scaling/Scoring Psychometrics
Activities-specific
Balance Confidence
(ABC) Scale 		16 items Item:
       0% No Confidence
       100% Complete Confidence
       Aggregate:
       < 50% Low-functioning
       50-80% Moderate level
       > 80% High-functioning
At cutpoint of 67% (fallers vs non fallers):
Sensitivity 84%
Specificity 87%
Dizziness Handicap
Inventory (DHI) 		Subscales:
- Physical 7 items
- Functional 9 items
- Emotional 9 items 		Item:
      0 = No
      2 = Sometimes
      4 = Yes
      Aggregate:
      16 - 34 Mild Handicap
      36 - 52 Moderate Handicap
      ≥ 54 Severe Handicap 		Internal consistency: Cronbach alpha 0.89
Test-retest reliability: Pearson r > 0.80