Surgeons’ opinions about enhanced recovery after surgery for retroperitoneal sarcoma: A survey

Table 2 Inter-observer concordance with the reference group (median Kw) in the two rounds of the survey

Observer	Relevance (Kw)		Feasibility (Kw)
	Round 1	Round 2	Round 1	Round 2
11	0.5681	0.7001	0.2941	0.3531
2	-0.154	0.386	0.185	0.350
31	0.2191	0.4621	0.3331	0.1881
41	0.6151	0.7281	0.6471	1.0001
51	0.4091	0.7371	0.3641	0.6021
6	0.227	0.438	0.333	0.143
7	-0.099	0.088	-0.154	-0.083
8	0.881	0.361	-0.059	0.265
9	0.144	0.612	0.292	0.306
10	0.298	0.426	0.391	0.138
11	-0.008	0.337	-0.243	-0.143
12	-0.094	0.000	0.037	0.091
13	0.298	0.353	0.286	0.352
Median Kw (range)	0.227 (-0.154; 0.881)	0.426 (0; 0.737)	0.292 (-0.243; 0.647)	0.265 (-0.143; 1.00)

¹The surgeons constituting the reference group.

Kw: The weighted kappa statistic.