Older Chinese people without high blood pressure who are overweight (BMI between 24 and 28) are less likely to die from any cause compared to those with a normal weight.

Older Chinese people with high blood pressure who are obese (BMI 28 or higher) are less likely to die from any cause compared to those with a normal weight.

Older Chinese people without high blood pressure who are underweight (BMI below 18.5) are much more likely to die from any cause compared to those with a normal weight.

Older Chinese people without high blood pressure who have a BMI between 26 and 28 are less likely to die from any cause compared to those with a BMI between 22 and 24.

Older Chinese people without high blood pressure who are obese (BMI 28 or higher) do not have a significantly different risk of dying from any cause compared to those with a normal weight.

Older Chinese people with high blood pressure who have a BMI between 28 and 30 are less likely to die from any cause compared to those with a BMI between 22 and 24.