Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
This study aims to assess the impact of preoperative anemia status on anemia and related nutrient abnormalities 1 year after bariatric surgery.
This study aims to assess the impact of preoperative anemia status on anemia and related nutrient abnormalities (ferritin deficiency, vitamin B12 deficiency, folate deficiency, and low transferrin saturation level) at 1 year after bariatric surgery.
Not provided
Not provided
Not provided
Not provided
Not provided
| Measure | Description | Time Frame |
|---|---|---|
| Odds ratio (OR) for anemia by preoperative anemia status | Multivariable logistic regression will be performed to assess the association between preoperative anemia and postoperative anemia. Several factors will be adjusted: sex, age, BMI, waist circumference, hip circumference, surgery, smoking, alcohol, hypertension, diabetes, hyperuricemia, hypercholesterolemia, and hypertriglyceridemia. | 1 year |
| Measure | Description | Time Frame |
|---|---|---|
| Percentage of postoperative anemia | Percentage of postoperative anemia,, , and low transferrin saturation level. | 1 year |
| Percentage of anemia severity | Percentage of anemia severity (mild: hemoglobin≥110g/L; moderate: hemoglobin≥80g/L; severe: hemoglobin<80g/L). |
Not provided
Inclusion Criteria:
Exclusion Criteria:
Not provided
Not provided
Not provided
Patients who underwent bariatric surgery aged between 16 and 70 years will receive follow-up for at least 1 year.
Not provided
| Name | Affiliation | Role |
|---|---|---|
| Yuntao Nie, M.D. | China-Japan Friendship Hospital | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Yuntao Nie | Beijing | 100029 | China |
Patient data must be obtained with the consent of the principal investigator.
Not provided
Not provided
Not provided
Not provided
Not provided
| ID | Term |
|---|---|
| D000740 | Anemia |
| ID | Term |
|---|---|
| D006402 | Hematologic Diseases |
| D006425 | Hemic and Lymphatic Diseases |
Not provided
Not provided
Not provided
Not provided
Not provided
| 1 year |
| Percentage of ferritin deficiency | Percentage of ferritin deficiency, which is defined as ferritin less than 30 ng/mL. | 1 year |
| Percentage of vitamin B12 deficiency | Percentage of ferritin deficiency, which is defined as vitamin B12 less than 150 pmol/L. | 1 year |
| Percentage of folate deficiency | Percentage of folate deficiency, which is defined as folate less than 10 nmol/L. | 1 year |
| Percentage of low transferrin saturation level | Percentage of low transferrin saturation level, which is defined as transferrin saturation less than 20%. | 1 year |