Primary and Secondary Spontaneous Pneumothorax: Prevalence, Clinical Features, and In-Hospital Mortality

Table 1

Modified ECOG performance status for this study.

Grade	Content
0	Fully active without restriction
1	Restricted in physically strenuous activities, but ambulatory and able to carry out work of a light or sedentary nature
2	Ambulatory and capable of all self-care, but unable to carry out any work activities; up and about for more than 50% of waking hours
3	Capable of only limited self-care; confined to bed or a chair for more than 50% of waking hours
4	Completely disabled; cannot perform any self-care; completely confined to bed or a chair

ECOG, Eastern Cooperative Oncology Group.