Table 5. Multivariate regression analysis to determine the significant independent predictors of anemia post-bariatric surgery (n=520).

† Some patients were lost to follow-up.

‡ Patients within the normal range were excluded from the analysis.

AOR – Adjusted Odds Ratio; CI – Confidence Interval.

Adjusted with age and comorbidities.

** Significant at p<0.05 level.

Factor	AOR	95% CI	P-value
Gender
Male	Ref
Female	4.079	2.530 – 6.575	<0.001 **
Type of bariatric surgery
Sleeve gastrectomy	0.328	0.116 – 0.924	0.035 **
Gastric bypass	Ref
Post BMI level †
<25 kg/m2	Ref
≥25 kg/m2	0.274	0.094 – 0.801	0.018 **
Post Hematocrit level ‡
Low	181.1	39.5 – 831.7	<0.001 **
Elevated	Ref
Post Hgb level ‡
Low	456.2	48.9 – 4256.1	<0.001 **
Elevated	Ref
Post MCV level ‡
Microcytic	10.027	1.121 – 89.712	0.039 **
Macrocytic	Ref