Table 1.

Historical Comparison of Percent Total Body Surface Area Burn Resulting in 50% Mortality (Lethal Area₅₀)

Year	First author (country)	0–14 Years		15–44 Years		45–64 Years		≥65 Years
		n	%	n	%	n	%	n	%
1949	Bull (UK)	342	51	311	43	95	23	46	9
1954	Bull (UK)	1,366	49	967	46	330	27	144	10
1956	Schwartz (US)	--	––	480	65	--	––	--	––
1957	Barnes (US)	217	39	221	65	219	39	128	26
1964	Pruitt (US)	238	49	806	56	56*	29*	––	––
1971	Bull (UK)	962	64	565	56	246	40	149	17
1980	Curerri (US)	232	63	413	63	178	38	114	23
1987	Herndon (US)	875	95	612	76	132	46	52	19

^*≥50 years.