Bariatric Revisionary Surgery for Failed or Complicated Vertical Banded Gastroplasty (VBG): Comparison of VBG Reoperation (re-VBG) versus Roux-en-Y Gastric Bypass-on-VBG (RYGB-on-VBG)

Table 6

Outcomes of revisionary surgery for failed or complicated VBGs: statistical study to compare changes in BMI between 2 groups.

Statistics	Follow-up
	1 yr	2 yrs	3 yrs
Variance between the groups (${{\text{S}}^2}_{\text{bet}}$)	80.07	8.56	82.8
Variance into the groups (${{\text{S}}^2}_{\text{into}}$)	20.31	38.05	26.2
$F$	3.94	0.63	3.16
Student $t$-test	1.98	0.47	1.18
$P$	$<$.05	.63	.08