Table 2.

Survival and observation time of COPD patients versus non-COPD patients receiving NIV for the first time

	COPD	Non-COPD
Patients, n (male/female)	216 (95/121)	37 (14/23)
Age, years (median)*	72 (45; 66; 79; 91)	71 (24; 62; 80; 88)
Mean survival of mortal patients, days (median)*	227 (0; 15; 810; 2224)	15 (0; 4; 177; 1302)
Mean observation time of survivors, days (median)*	2097 (1707; 1822; 2509; 2582)	2002 (1609; 1728; 2412; 2508)

Note:

^*(min; 25th percentile; 75th percentile; max).

Abbreviations: COPD, chronic obstructive pulmonary disease; NIV, noninvasive ventilation.