Semiquantitative Assessment of Bowel Habits and Its Relation with Calcium Metabolism after Gastric Bypass Surgery: A Retrospective Study

Table 1

Preoperative demographics and laboratory data prior to gastric bypass surgery.

Parameters
Patient no.	103
Males/Females	27/76¹
Age (yr)	42.3 ± 9.7
BMI (Kg/m^2)	48.6 ± 6.2
Body weight (Kg)	144.3 ± 21.9
Alimentary limb
Patient no.  with 100 cm	83
Patient no.  with 150 cm	20
		Patients with abnormal lab. values
Calcium (mmol/L)²	2.31 ± 0.07	2³
Vitamin D (nmol/L)	50.4 ± 22.4
Insufficiency <30 (nmol/L)		18 (17%)
Deficiency <50 (nmol/L)		32 (31%)
PTH (pmol/L)	5.1 ± 1.0	10 (10%)

¹The number of males versus females was statistically different (𝑃<.05). ²Serum calcium was adjusted for albumin concentrations. ³1 Patient had a corr. serum calcium of 2.63 and 1 patient of 2.10 mmol/L.