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. 2021 May 4;31:20. doi: 10.1038/s41533-021-00235-x

Table 1.

Characteristics of interviewed COPD patients.

Characteristic Mean (years) Range in years
Age 68 51–78
Time since diagnosed with COPD 2.9 1–7
N %
Gender
Female 3 33.3
Male 6 66.7
Race
White 5 55.6
Black 1 11.1
Red Indian 3 33.3
Education
Elementary school I incomplete 6 66.7
Elementary school I complete 1 11.1
Elementary school II complete 1 11.1
Bachelor 1 11.1
Employment
Retired 6 66.7
Neither work or study 2 22.2
Work only 1 11.1
Number of natural teeth
No natural teeth 5 55.6
1–9 teeth 1 11.1
10–19 teeth 2 22.2
≥ 20 teeth 1 11.1
Prosthesis use
None 3 33.3
Yes, to replace more than one tooth 1 11.1
Yes, full denture on top 2 22.2
Yes, total dentures (top and bottom) 3 33.3
Grade on MRC dyspnoea scalea
Grade 1 4 44.4
Grade 2 1 11.1
Grade 3 1 11.1
Grade 4 1 11.1
Smoking history
Ex-smoker 8 88.9
Current smoker 1 11.1

aDemographic distribution of grade on the MRC scale does not equal 100% as two participants did not disclose their grade.