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Table 2 Comparison of interview and medical record data for basic ADL impairments (N = 1402)

From: Impact of data source and time reference of functional status on hospital mortality prediction

Measure Valid Prevalence of Impairment (%)      
   Interview Medical Records κ Sensitivity* (%) Specificity* (%) PPV* (%) NPV* (%)
Pre-admission         
Any of 5-item ADL† 1,383 33 38 0.71 87 87 77 93
Transferring 1,224 36 31 0.75 93 89 73 97
Walking 1,382 46 29 0.53 57 95 90 72
Any of 7-item ADL† 1,387 48 39 0.64 72 91 88 78
On-admission         
Any of 5-item ADL† 1,375 36 78 0.24 97 33 45 95
Transferring 1,376 27 78 0.18 98 30 34 98
Walking 1,375 49 78 0.31 94 37 59 88
Any of 7-item ADL† 1,374 50 83 0.28 97 31 59 91
  1. * Interview data used as reference standard for sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV).
  2. † Includes feeding, bathing, grooming, dressing, and toileting.
  3. ADL: Activities of Daily Living.