Table 1.

Comparison of R1 rates for PDAC.

Study	Year	Study period	Number of patients	R1/R2 rates
Willet et al. [8]	1993	1978–1991	72	51%
Yeo et al. [43]	1997	1990–1996	282	29%
Richter et al. [6]	2003	1972–1998	194	37%
Wagner et al. [7]	2004	1993–2001	165	23.6%
Cameron et al. [44]	2006	1969–2003	405	36%
Kuhlmann et al. [45]	2006	1992–2001	160	50%
Verbeke et al. [17]	2006	1995–2003	26	85%
Winter et al. [46]	2006	1970–2006	1175	42%
Raut et al. [9]	2007	1990–2004	360	17%
Esposito et al. [16]	2008	2005–2006	111	76%
Campbell et al. [18]	2009	1997–2007	163	79%
Jamieson et al. [4]	2010	1996–2007	148	74%