Table 3.
The number of matching as well as non-missing, non-matching identifier pairs within the set of 7,293 linked neonatal records.*
| Count of Matching Pairs | Number of Linked Records (N) | Absolute Percent (%) | Cumulative Percent (%) | Count of Non-Matching Pairs | Number of Linked Records (N) | Absolute Percent (%) | Cumulative Percent (%) |
|---|---|---|---|---|---|---|---|
| 12 | 347 | 4.8% | 4.8% | 12 | 0 | 0.0% | 0.0% |
| 11 | 1,310 | 18.0% | 22.7% | 11 | 0 | 0.0% | 0.0% |
| 10 | 1,738 | 23.8% | 46.6% | 10 | 0 | 0.0% | 0.0% |
| 9 | 1,382 | 18.9% | 65.5% | 9 | 0 | 0.0% | 0.0% |
| 8 | 1,228 | 16.8% | 82.3% | 8 | 2 | 0.0% | 0.0% |
| 7 | 714 | 9.8% | 92.1% | 7 | 3 | 0.0% | 0.1% |
| 6 | 308 | 4.2% | 96.4% | 6 | 67 | 0.9% | 1.0% |
| 5 | 189 | 2.6% | 98.9% | 5 | 272 | 3.7% | 4.7% |
| 4 | 60 | 0.8% | 99.8% | 4 | 532 | 7.3% | 12.0% |
| 3 | 16 | 0.2% | 100.0% | 3 | 748 | 10.3% | 22.3% |
| 2 | 1 | 0.0% | 100.0% | 2 | 1,724 | 23.6% | 45.9% |
| 1 | 0 | 0.0% | 100.0% | 1 | 1,954 | 26.8% | 72.7% |
| 0 | 0 | 0.0% | 100.0% | 0 | 1,991 | 27.3% | 100.0% |
*
The 12 identifier pairs included in the evaluation were: infant date of birth, infant sex, Soundex-encoded infant first name, Soundex-encoded infant surname, street number, Soundex-encoded street name, zip code, infant birth weight rounded to the nearest 10 grams, Soundex-encoded maternal first name, Soundex-encoded maternal surname, comparison of the Soundex-encoded infant surname to the Soundex-encoded maternal surname, and comparison of the Soundex-encoded infant surname to the Soundex-encoded paternal surname.