A blinded evaluation of privacy preserving record linkage with Bloom filters

Table 2 Results of the comparison of clear-text and PPRL linkage

	n	%
Mortality records	68,955	100.0%
Links to morbidity records found by BOTH clear-text/PPRL	68,478	99.3%
Additional links found through PPRL only	48	0.1%
Correct	42	0.1%
Incorrect	6	0.0%
Additional links found by clear-text linkage only	432	0.6%
Correct^a	383	0.6%
Incorrect^a	55	0.1%

^aFor six mortality records, the clear-text linkage found both additional correct and incorrect links; these have been counted in both correct and incorrect categories

ISSN: 1471-2288