± SD (range)   76 ± 15.7 (27–92)  48.5 ± 13.07 (35–65)
 Men  12 (66.7)  3 (75)
 Women  6 (33.3)  1 (25)
Comorbidity
 Chronic obstructive pulmonary disease  6 (33.3)  …
 Cardiac disease  8 (44