Table 5.

Mean total cost and difference in mean total cost per surgical technique in different models

	Laparoscopic lavage (€)*	Hartmann's procedure (€)*	Difference (lavage – Hartmann's) (€)	s.d.	95% c.i.	P
Base‐case A	18 025(14 646)	27 009(18 445)	−8983	33 190	−16 232, –1735	0·016
Non‐parametric bootstrap				32 553	−16 218, –2191	0·012
Base‐case B	25 703(27 544)	45 498(38 928)	−19 794	67 889	−34 657, –4931	0·010
Non‐parametric bootstrap				66 938	−34 200, –5488	0·007
Lin	18 480(14 696)	30 133(17 156)	−11 653	31 876	−18 614, –4691	0·001
Non‐parametric bootstrap				31 100	−18 531, –5488	0·001
Bang and Tsiatis	18 952(16 681)	29 874(21 166)	−10 922	37 972	−19 215, –2629	0·011
Non‐parametric bootstrap				38 007	−19 707, –3256	0·009

^*Values are mean(s.d.). Non‐parametric bootstrap based on 2000 iterations; corresponding confidence intervals are calculated using the value of the 2·5 and 97·5 per cent percentiles as confidence limits.