How Can Respiratory Issues With Breathing At Night In A Heavy Smoker Be Managed?

Hi, My elder brother who is 38 years old is a heavy smoker. He has respiratory issues with breathing at night. As per Doctor s suggestion, his sleep report was created. I request you to kindly interprete the report and let me know answers to the below questions : Is the report abnormal and matter of concern? If the report suggests a problem, then what is the severity? Is it mild, severe or critical? If there is a problem, What is the treatment for this? Thanks in Advance