Final answer:
The risk of VTE when CHCs are used is increased by patient characteristics such as being older than 35 and smoking, having a history of blood clots, or having a history of breast, liver, or endometrial cancer.
Step-by-step explanation:
The patient characteristics that increase the risk of VTE (venous thromboembolism) when CHCs (combined hormonal contraceptives) are used include:
- Being older than 35 and smoking
- Having a history of blood clots
- Having a history of breast, liver, or endometrial cancer
These factors can increase the risk of developing blood clots when using CHCs. For example, smoking and being over 35 years old can affect blood clotting and increase the likelihood of VTE. Additionally, having a history of blood clots or certain types of cancer can further increase the risk.