Reason for exclusion | n |
---|---|
Current breathing problem requiring supplemental oxygen | 101 |
Current pain or physical problem preventing taking a deep breath | 150 |
Coughed up blood in previous month | 17 |
Eye surgery in previous 3 months | 74 |
Open chest or abdominal surgery in previous 3 months | 42 |
Stroke in previous 3 months | 9 |
Heart attack in previous 3 months | 7 |
Tuberculosis in previous year | 21 |
History of aneurysm | 66 |
History of collapsed lung | 79 |
History of detached retina | 83 |