National trends in resection of the distal pancreas

Table 2 Number of patients and lymph nodes resected per year from 2003 to 2008 (Surveillance Epidemiology and End Results database)

Year	Number of lymph nodes resected				Lymph node ratio in N1 disease
	n	Median	1QR	3QR	n	Median	1QR	3QR
2003	88	8	2	14	31	0.27	0.14	0.50
2004	133	7	4	13	66	0.23	0.13	0.50
2005	133	7	3	14	62	0.23	0.10	0.50
2006	160	8	5	13	71	0.21	0.14	0.45
2007	179	8	4	15	85	0.25	0.13	0.36
2008	315	9	5	16	94	0.21	0.13	0.40

QR: Quartile range.