. 2009 Sep 3;24(4):845–853. doi: 10.1007/s00464-009-0675-0

Table 4.

Generalized linear modeling (GLM) estimates for index length of stay and unadjusted number of readmission/admission for minimally invasive surgery (MIS) versus open surgery by procedure

	Total n	LOS (days)^a Mean ± SE^b	Mean no. of readmissions
	Total n	LOS (days)^a Mean ± SE^b	Day 30	Day 60	Day 90	Day 180
Colectomy	2,479
MIS		6.46 ± 0.17^c	1.07 ± 0.26	1.00 ± 0.00^c	1.15 ± 0.38	1.00 ± 0.00
Open		10.66 ± 0.25^c	1.10 ± 0.33	1.07 ± 0.26^c	1.02 ± 0.15	1.05 ± 0.22
Appendectomy	4,717
MIS		3.27 ± 0.04^c	1.09 ± 0.29	1.10 ± 0.30	1.10 ± 0.00	1.00 ± 0.00
Open		3.91 ± 0.08^c	1.07 ± 0.25	1.00 ± 0.00	1.08 ± 0.28	1.00 ± 0.00

SE standard error of the mean, MIS minimally invasive surgery

^aIndex length of stay

^bBootstrapped standard errors obtained using 200 bootstrap repetitions

^c P < 0.05, MIS vs. open surgery