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Table 5 Frequency and agreement between methods of determination of nursing home residence (n = 150, Weighted n = 520,260)

From: Validation of a method for identifying nursing home admissions using administrative claims

  Algorithm 1* Algorithm 2 Expert Review
Frequency (%) of NH stay    
Unweighted 6 (4.0) 18 (12.0) 18 (12.0)
Weighted 3,320 (0.6) 5,473 (1.1) 5,473 (1.1)
Correspondence with expert review    
   Agreement    
Unweighted 92.0% 98.7% -
Weighted 99.6% 99.9% -
   Sensitivity    
Unweighted 0.33 0.94 -
Weighted 0.61 0.97 -
   Specificity    
Unweighted 1.00 0.99 -
Weighted 1.00 1.00 -
   Kappa (95% CI)    
Unweighted 0.47 (0.22, 0.71) 0.93 (0.85, 1.00) -
Weighted 0.75 (0.74, 0.76) 0.97 (0.96, 0.97) -
  1. NH = nursing home; CI = confidence interval
  2. *Algorithm 1 defined a person-month as a nursing home stay if there was at least one day in the month where the nursing home RULE = "PROBABLE"; otherwise the person-month was considered not to be a nursing home stay.
  3. † Algorithm 2 defined a person-month as a nursing home stay if there was at least one day in the month where the nursing home RULE = "PROBABLE" or RULE = "POSSIBLE"; otherwise the person-month was considered not to be a nursing home stay.