1. the quality or state of being chronic; the persistent or long-lasting nature of a disease, condition, or problem
Usage: medical and healthcare contexts; formal register

Examples

• The chronicity of diabetes requires ongoing management and lifestyle changes.
• Doctors must consider the chronicity of the patient's condition when planning treatment.
• The chronicity of chronic pain affects both physical and mental health.
• Research focuses on reducing the chronicity of inflammatory diseases.
• Insurance coverage often depends on the chronicity and severity of the illness.