Table 1.

Number of exact concordance in global similarity (gS) and atomic similarities (aS) in the 38,083 identified pairs in a database of 300,859 patients

	Atomic similarities
	gS	BN*	MN*	BN/MN*	First name	Date of birth
Pairs	38,083	38,083	38,083	76,166 **	38,083	38,083
Missing	0	0	31,747	57,088	0	0
Values at 1	9,566	25,990	5,348	3,065	26,017	26,505
in %	25.1	68.2	14.0	4.0	68.3	69.6

* BN = birth name, MN = married name

** Theoretical number of comparisons between BN and MN