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Table 1 Linkage using Medicare number and suffix (V1)

From: Validation of de-identified record linkage to ascertain hospital admissions in a cohort study

Iteration Linkage Variables used in V1 Records
Linked
Records
remaining
1 Medicare81 + Medsuf12 1,667 333
2 Medicare8+first and second letters of Medsuf1+Sex 7 326
3 Medicare8+ second and third letters of Medsuf1+Sex 2 324
4 Medicare8+first and third letters of Medsuf1+Sex 0 324
5 Medicare8+Yearbirth+Sex 26 298
6 Medsuf1+Yearbirth+Monthbirth+Daybirth+Sex+Country of Birth+Postcode1 32 266
7 Medsuf1+Yearbirth+Monthbirth+Daybirth+Sex+Country of Birth+Postcode2 4 262
8 Medsuf1+Yearbirth+Monthbirth+Daybirth+Sex+Country of Birth+Postcode3 2 260
9 Medsuf1+Yearbirth+Monthbirth+Daybirth+Sex+Country of Birth+Postcode4 1 259
10 Yearbirth+Monthbirth+Daybirth+Sex+Country of Birth+Postcode1 124 135
  Total Matched 1865 135
  1. 1 First 8 digits of the Medicare number; 2 First 3 letters of the first name