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Table 1 Participants excluded from having spirometry for safety-related reasons (N = 649)

From: Pulmonary function, chronic respiratory symptoms, and health-related quality of life among adults in the United States – National Health and Nutrition Examination Survey 2007–2010

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