Table 1.

Participants excluded from having spirometry for safety-related reasons (N = 649)

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