Table 18: Summary of Findings on Hypertension Resolution After Roux-en-Y Gastric Bypass.

Study (Year)	Hypertension Definition	Follow-up, Months	Patients With Comorbidity at Baseline, N	Resolved, % (n)	Improved, % (n)	No Change, % (n)	Worse, % (n)
Wittgrove (2000)	Not defined	3–60	118	92 (108)	Not reported	Not reported	Not reported
Carson (1994)	Either the patient was taking hypertensive medication, or diastolic blood pressure > 90 mm Hg	48	45	67 (12)	22 (4)	11 (2)	0 (0)
Kalfarentzos (1999)	Systolic blood pressure > 140 mm Hg or diastolic blood pressure > 90 mm Hg	Mean, 16.8	13	69 (9)	15 (2)	15 (2)	0 (0)
Cowan (1998)	Systolic blood pressure >140 mm Hg, diastolic blood pressure > 90 mm Hg	6–12	27	93 (25)	Not reported	Not reported	Not reported

(Table reproduced with kind permission from ECRI. Bariatric Surgery for Obesity. 2004. Plymouth Meeting, PA, ECRI. Technology Assessment Report.)