Question

In patients with a post-bronchodilator FEV1/FVC < 0.70, at what post-bronchodilator FEV1 predicted value is the COPD severity classified as Stage 1 or 'mild'

Answer 1

In patients with a post-bronchodilator FEV1/FVC < 0.70, the severity of COPD is classified as Stage 1 or 'mild', but a specific post-bronchodilator FEV1 predicted value is not specified.

Step-by-step explanation:

The post-bronchodilator FEV1/FVC ratio is used to diagnose chronic obstructive pulmonary disease (COPD). In patients with a post-bronchodilator FEV1/FVC ratio of less than 0.70, the severity of COPD is classified as Stage 1 or 'mild'.

However, the question does not specify a specific post-bronchodilator FEV1 predicted value for Stage 1 or 'mild' COPD. The severity of COPD is usually classified based on the Global Initiative for Chronic Obstructive Lung Disease (GOLD) guidelines, which consider FEV1 predicted values as a percentage of the expected normal value.

For example, according to the GOLD guidelines, Stage 1 or 'mild' COPD is defined as a post-bronchodilator FEV1 predicted value of equal to or greater than 80% of the expected normal value.