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J Am Med Inform Assoc 16:738-745 doi:10.1197/jamia.M3186
  • Original Investigation

An Empiric Modification to the Probabilistic Record Linkage Algorithm Using Frequency-Based Weight Scaling

Table 1

Sensitivity, specificity, and positive predictive value for the union of all blocking schemes across different weight scaling approaches

Scaling Approach TP FN FP TN SENS (%) SPEC (%) PPV (%)
No scaling 8,991 154 18 144 98.3 88.9 99.8
Scale bottom 5% 9,082 63 18 144 99.3 88.9 99.8
Scale bottom 10% 9,082 63 18 144 99.3 88.9 99.8
Scale below median 9,082 63 18 144 99.3 88.9 99.8
Scale below mean 9,082 63 18 144 99.3 88.9 99.8
Scale top and bottom 10% 8,989 156 15 147 98.3 90.7 99.8
Scale top 10% 8,723 422 2 160 95.4 98.8 99.9
Scale above median 8,723 422 2 160 95.4 98.8 99.9
Scale above mean 8,723 422 2 160 95.4 98.8 99.9
Scale all 8,725 420 2 160 95.4 98.8 99.9

FN = false-negative; FP = false-positive; PPV = positive predictive value; SENS = sensitivity; SPEC = specificity; TN = true-negative; TP = true-positive.

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