Table 2– Description of the follow-up of 274 chronic obstructive pulmonary disease (COPD) patients

Total days of follow-up	934 (655–1067)
COPD hospital readmissions during follow-up
Min	0
1st quartile	0
Median	0
3rd quartile	1
Max	13
COPD hospital readmissions during follow-up
0	177 (65)
1	34 (12)
2	28 (10)
≥3	35 (13)
Days to first COPD hospital readmission only if readmission^#	304 (141–622)
Total number of deaths	15 (5)
Deaths before any COPD hospital readmission^¶	2 (1)

Data are presented as median (quartile 1–quartile 3) or n (%), unless otherwise stated. ^#: n=97; ^¶: subjects censored in time-to-readmission analysis.