Table 8.

Vitamin B12 levels during 6-month follow-up according to resected ileum length

	Baseline vitamin B12 median (range) value, pg/mL	3-month vitamin B12 median (range) value, pg/mL	6-month vitamin B12 median (range) value, pg/mL	p value
Any ileum length (n = 92)	307.0 (81.9–2295.2)	287.0 (76.0–1394.0)	294.0 (73.8–892.3)	< 0.001
Resected ileum length < 20 cm (n = 59)	240.0 (81.9–2295.2)	255.5 (76.0–1394.0)	265.0 (73.8–892.3)	0.02
Resected ileum length ≥ 20 cm (n = 33)	376.0 (185.0–631.0)	372.0 (207.0–596.0)	325.0 (131.0–564.0)	< 0.001