Which factor best describes the relationship between smoking and vascular events in this context?

Which factor best describes the relationship between smoking and vascular events in this context?

• A. Non-smoking
• B. Cigarette smoking
• C. Regular exercise
• D. Age under 25

Answer: (B)

Cigarette smoking is a powerful driver of vascular events. It injures the endothelium, promotes atherogenesis, increases platelet aggregation and coagulability, and causes vasoconstriction via nicotine. Carbon monoxide reduces oxygen delivery to tissues, and the combination of inflammation and oxidative stress from smoking accelerates vascular damage. These effects directly raise the risk of heart attack, stroke, and peripheral vascular disease, making smoking the clearest factor linking exposure to vascular events in this context. Non-smoking describes the absence of exposure, which does not explain why smoking would increase risk. Regular exercise improves vascular health and lowers risk, but it does not capture the harmful mechanisms smoking introduces. Age under 25 generally carries a lower baseline risk for vascular events and does not account for the strong, smoking-related vascular risk seen across ages. Therefore, cigarette smoking best describes the relationship.

Cigarette smoking is a powerful driver of vascular events. It injures the endothelium, promotes atherogenesis, increases platelet aggregation and coagulability, and causes vasoconstriction via nicotine. Carbon monoxide reduces oxygen delivery to tissues, and the combination of inflammation and oxidative stress from smoking accelerates vascular damage. These effects directly raise the risk of heart attack, stroke, and peripheral vascular disease, making smoking the clearest factor linking exposure to vascular events in this context.

Non-smoking describes the absence of exposure, which does not explain why smoking would increase risk. Regular exercise improves vascular health and lowers risk, but it does not capture the harmful mechanisms smoking introduces. Age under 25 generally carries a lower baseline risk for vascular events and does not account for the strong, smoking-related vascular risk seen across ages. Therefore, cigarette smoking best describes the relationship.