Valid Responses to ABO Blood Type Question in Self-reporting Questionnaire

Area of Science:

• Medical Science
• Epidemiology
• Clinical Research

Background:

• Accurate ABO blood type data is crucial for epidemiological studies.
• Self-reported blood types are often used in large-scale studies.
• Validation of self-reported data against actual blood tests is necessary.

Purpose of the Study:

• To determine the sensitivity and specificity of self-reported ABO blood type.
• To assess the validity of self-reported blood type data in an outpatient setting.
• To evaluate the reliability of self-reported blood type for epidemiological research.

Main Methods:

• A cohort of 276 outpatients undergoing Helicobacter pylori eradication therapy had their self-reported ABO blood type compared to a laboratory blood test.
• Sensitivity and specificity were calculated for each ABO blood type (A, B, AB, O).
• Data analysis included participants who did not know their blood type and those with discrepancies.

Main Results:

• Self-reported ABO blood type demonstrated high sensitivity across all groups: O (98.7%), A (96.1%), B (92.9%), and AB (93.1%).
• Specificity for all blood types exceeded 99%.
• Only three participants reported an incorrect blood type, and nine were unaware of their type.

Conclusions:

• Self-reported ABO blood type is a highly valid and reliable method for data collection in epidemiological studies.
• The high accuracy supports the use of self-reported blood type in large population research.
• Findings confirm the utility of self-reported blood type data in clinical and epidemiological contexts.