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Table 1 Characteristics of Medicare beneficiaries by frailty status at baseline, NHATS, 2011a

From: Association between baseline frailty and driving status over time: a secondary analysis of The National Health and Aging Trends Study

Variables Total Frail Not Frail P-value
Total % (N) (6288) 15.3 (1193) 84.7 (5095)  
Driving status     <0.0001
 Current driver 83.4 54.0 88.7  
 Current non-driver 16.6 46.0 11.3  
Age group     <0.0001
 65–69 29.4 18.2 31.5  
 70–74 25.8 19.4 27.0  
 75–79 19.2 17.6 19.5  
 80–84 14.3 19.4 13.3  
 85–89 7.9 17.2 6.2  
  ≥ 90 3.4 8.2 2.5  
Gender     0.0002
 Female 54.0 60.0 52.9  
 Male 46.0 40.0 47.1  
Race/Ethnicity     <0.0001
 White non-hispanic 84.3 78.1 85.4  
 Black non-hispanic 7.3 11.0 6.7  
 Hispanic 5.7 8.4 5.2  
 Other 2.7 2.4 2.7  
Living arrangement     0.0078
 Alone 28.7 34.2 27.7  
 Not Alone 71.3 65.8 72.3  
Dementia     <0.0001
 Probable 6.5 19.2 4.2  
 Possible or No 93.5 80.8 95.8  
Comorbidity scale     <0.0001
 0 19.2 6.5 21.6  
 1 30.8 17.6 33.1  
 2 27.0 29.0 26.6  
 3 14.3 24.1 12.6  
 4 or more 8.7 22.9 6.1  
  1. aAnalyses of weighted data from the National Health and Aging Trends Study. Sample totals provided along with weighted percentages