Interconversion of two commonly used performance tools: An analysis of 5844 paired assessments in 1501 lung cancer patients

Table 2 Baseline characteristics of the study population n (%)

Characteristic	Total, n = 1501
Age in yr	58.4 (10.8)
Males	1236 (82.3)
Smokers	1155 (76.9)
Body mass index in kg/m2	20.2 (4.2)
Histopathology
NSCLC: Squamous	553 (36.8)
NSCLC: Adeno	514 (34.2)
NSCLC: Undifferentiated	87 (5.8)
NSCLC: Other	42 (2.8)
SCLC	305 (20.3)
NSCLC/SCLC stage1
I and II	44 (2.9)
IIIA	193 (12.9)
IIIB	426 (28.4)
IV	767 (51.1)
SCLC stage
Limited disease	145 (9.7)
Extensive disease	160 (10.7)
Baseline performance status
KPS	77.6 (14.4)
ECOG PS	1.5 (1)

¹Total does not add up to 1501 as TNM staging was available for only some of the patients with SCLC. All values are mean (standard deviation) unless otherwise specified. ECOG PS: Eastern Cooperative Oncology Group performance status; KPS: Karnofsky performance status; NSCLC: Non-small cell lung cancer; SCLC: Small cell lung cancer.