Table 5.

Multivariate logistic regression analysis of VitB12 deficiency

Influencing factor	β	SE	Wald value	OR	95%CI		P value
Age	0.519	0.149	4.865	1.680	1.255	2.250	0.023
BMI	1.477	1.325	0.004	4.380	0.326	58.795	0.957
Helicobacter pylori infection, positive = 1; negative = 0	1.730	0.279	7.218	5.640	3.264	9.745	0.000
Endoscopy results, atrophic gastritis = 1; nonatrophic gastritis = 0	2.145	0.364	9.645	8.546	4.187	17.442	0.000
Gastric acid	0.948	1.269	1.024	2.580	0.214	31.032	0.762
Serum gastrin	1.479	2.226	2.549	4.390	0.056	344.567	0.267

BMI: Body mass index; CI: Confidence interval; OR: Odds ratio; SE: Standard error; Vit: Vitamin.