Blood Types May Be Involved in the Occurrence of Coronary Heart Disease Through Serum Lipids.

The proportion of Type A blood was higher and Type O blood was lower among CHD patients compared to blood donors.

• Data were collected from 5188 CHD patients
• The proportion of Type A was higher in CHD patients (p = 0.012)
• The proportion of Type O was lower in CHD patients (p = 0.047)
• Comparison was made between CHD patients and blood donors as a reference population

Blood Type A was associated with a significantly increased risk of coronary heart disease compared with non-A blood types.

• Binary logistic regression analysis showed Type A had a 24% increased risk of CHD compared with non-A types
• OR [95% CI] 1.24: 1.05–1.45, p = 0.009
• Type A was described as an independent risk factor for CHD
• Analysis was performed in a Chinese population sample

The effect of Blood Type A on CHD risk was consistent across all subgroups with no significant interactions detected.

• Subgroup analyses and interaction tests were conducted to verify the robustness of the findings
• Blood Type A had a consistent effect on the risk of CHD across all subgroups
• No significant interaction was observed (p for interaction > 0.1)
• This finding supports Type A as a robust independent risk factor

CHD patients with Type A blood had significantly higher serum levels of total cholesterol, triglycerides, and LDL-C compared to those with non-A blood types.

• Total cholesterol (TC) was significantly higher in Type A CHD patients (p = 0.02)
• Triglyceride (TG) levels were significantly higher in Type A CHD patients (p = 0.045)
• Low-density lipoprotein cholesterol (LDL-C) was significantly higher in Type A CHD patients (p = 0.019)
• Serum biological markers were compared across different blood types among CHD patients

Serum lipids were identified as a potential mediating pathway through which ABO blood type antigens may influence the occurrence of coronary heart disease.

• Higher TC, TG, and LDL-C in Type A CHD patients compared with non-A CHD patients suggested a lipid-mediated mechanism
• The authors propose that 'blood type antigens may be involved in the occurrence of CHD through the lipid pathway'
• The secondary study objective was specifically to explore whether blood lipids serve as a potential influencing factor in the relationship between blood types and CHD