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Table 3 Convergent and discriminant validation measures

From: Using a single question to assess physical activity in older adults: a reliability and validity study

Validation Measure Response Options Assessment Toola
Objective Measures (Convergent Validity)   
1. Total score on Berg Balance Scale Score range from 0 to 56 interRAI
2. Unsteady gait ▪ No
▪ Yes
interRAI
3. Gait (path) ▪ Straight without walking aid VCA
4. Gait (trunk) ▪ No sway, flexion, use of arms, or walking aid
▪ Sway/Uses aid/Flexion/Spreads
VCA
5. Gait (abnormality) ▪ No
▪ Yes
VCA
6. Evidence of lower extremity weakness ▪ No
▪ Yes
VCA
7. Postural stability test (nudged)b ▪ Steady
▪ Staggers, grabs, catches self/Beings to fall
VCA
Self-Report Measures (Convergent Validity)   
1. Ability to walk 3 city blocks in last 3 days ▪ No difficulty
▪ Difficulty/Unable
interRAI
2. Difficulty with ordinary housework ▪ No difficulty
▪ Some/Great difficulty
interRAI
3. Limits going outdoors (fear of falling) ▪ No
▪ Yes
interRAI
4. Pain affects mobility ▪ No
▪ Yes
VCA
Objective Measures (Discriminant Validity)   
1. Vision ▪ Adequate
▪ Impaired/Moderately, highly or severely impaired
interRAI
2. Skin problems ▪ No
▪ Yes
interRAI
3. Evidence of hearing deficit ▪ No
▪ Yes
VCA
Self-Report Measures (Discriminant Validity)   
1. Home environment hazardous ▪ No
▪ Yes
interRAI
  1. aRefers to the measurement tool that contained the validation measure
  2. bItem from the Tinetti Balance Assessment Tool
  3. Abbreviations: interRAI = interRAI Community Health Assessment (earlier version); VCA = Veterans' Comprehensive Assessment
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