A Newly Developed Sublingual Tonometric Method for the Evaluation of Tissue Perfusion and Its Validation In Vitro and in Healthy Persons In Vivo and the Results of the Measurements in COPD Patients

Table 1

Clinical data of the study population.

COPD GOLD groups	II	III	IV
Number	15	22	17
Sex (male/female) number	9/6	13/9	14/3
Age, years	60.7 ± 8.2	63 ± 16.2	57 ± 8.1
Body weight	77.6 ± 24.0	65.8 ± 16.2	77.2 ± 16.5
Body mass index (kg/m^2)	26.4 ± 7.2	23.4 ± 4.0	27.1 ± 5.8
O2 therapy (+/−)	3/12	5/17	15/2
Smoking, pack-year	41.8 ± 24.1	36.7 ± 26.3	38.3 ± 23.5

Values given as mean ± SD.