Table 4.

Study deidentification overhead, SFD versus MSD.

SFD total (KB)	De-Id SFD (KB)	% Overhead	MSDtTotal (KB)	De-Id MSD (KB)	% Overhead
72,457	72,112	99.5%	71,646	78	0.11%
174,008	173,646	99.8%	173,262	80	0.05%
217,630	215,858	99.2%	213,946	310	0.14%
617,236	615,946	99.8%	615,119	372	0.06%
1,374,373	1,371,475	99.8%	1,369,166	901	0.07%
1,508,194	1,504,964	99.8%	1,500,874	692	0.05%
660,650	659,000	99.6%	657,336	406	0.08%