Table 3: Regression studies.

Lead authorStudy designPatientsMean ageOperation typeFemale (%)Results

Jantz [14]Retrospective38443.3LRYGB82.5Inconclusive
Alvarado [15]Retrospective9042LRYGB90Supportive
Sharon Alger [16]Prospective15045.3RYGB*80Inconclusive
Carlin [17]Retrospective29545LRYGB88.8Inconclusive

LRYGB: laparoscopic roux-en-y gastric bypass; *RYGB: Roux en Y Gastric Bypass. the roux-en-y gastric bypass was an open procedure.