Table 3.

Medical cost estimation

(Unit: USD)
	GEM-E	GEM	p-valuea
	(n = 1,331)	(n = 2,936)
Inpatient cost (Mean ± SD)b	14,846.70 ± 11,865.27	13,211.07 ± 1,0931.57	<0.0001
Length of stay (Mean ± SD)	64 ± 53	63 ± 54	0.8032
Outpatient cost (Mean ± SD)b	6,152.29 ± 7,233.05	6,066.95 ± 7,001.03	0.6920
Medication cost (Mean ± SD)b	3,264.00 ± 4,579.44	1,169.20 ± 1,644.40	<0.0001
Total medical costs (Mean ± SD)b	23,819.51 ± 15,106.18	19,927.98 ± 14,444.86	<0.0001

Abbreviation: GEM Gemcitabine, GEM-E Gemcitabine + Erlotinib

^aDifferences between GEM and GEM-E was tested with t-test after log transformation

^bAverage 2013 exchange rate: one US dollar (USD) = 1,113.85 Korea Won (KRW)