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

Table 2

Biochemical data categorized according to normal or increased PTH levels at 12 months after gastric bypass surgery.

PTH (pmol/L)	PTH ≤ 6.8	PTH > 6.8	Normal
Patient no.	67	36
Calcium	2.34 ± 0.08	2.31 ± 0.11	2.10–2.55 mmol/L
Vitamin D	47.5 ± 27.5	40.3 ± 20.3	30–100 nmol/L
Albumin	38.6 ± 3.0	38.6 ± 4.0	35–50 g/L
PTH	4.3 ± 1.4*	9.5 ± 2.8*	1.3–6.8 pmol/L

Lab. results are represented as (mean ± 1SD). *Significant by one-way ANOVA with 𝑃<.0001.