I have severe sleep apnea. The initial sleep study found that I stopped breathing, on average, every two minutes, during obstruction episodes. My blood/oxygen would fall as low as 84% in that time.
It took me more than two years to find the right CPAP device and medication combinations to let me sleep comfortably. I don’t think six months is a long enough study period.
Reduction in sleep apnea events to near zero did not reduce my blood pressure at all.
My initial sleep study showed I stopped breathing 83 times per hour. I'd stop breathing once every 45'ish seconds.
The only reason I did a sleep study was I ended up in the hospital with a mild heart attack first. Cardiologist came in the room, asked me to open my mouth and he looked down my throat. Asked if I ever had a sleep study right there and then.
Then he turned to my (now) ex-wife and asked her if I stopped breathing or sounded like I was choking while sleeping. Her answer: Yes. I did it "all the time".
Got the sleep study, got the cpap, started sleeping better immediately. Came to my senses after being able to think clearly again and we divorced.
She was literally waiting for me to die. As uncaring of a woman I've not since met in my life.