Table 1. Characteristics of small cell lung cancer patients at diagnosis.

Characteristics	SCLC cohort (N = 38)	Healthy controls (N = 20)
Age at baseline–years
Mean (SD)*	65 (8.5)	63 (2.8)
Range	42–80	57–67
Gender–no. (%)
Female	22 (58)	11 (55)
Male	16 (42)	9 (45)
Performance status–no. (%)
0–1	22 (58)
2–3	16 (42)
Disease stage–no. (%)
Limited disease	9 (24)
Extended disease	29 (76)
T-stage–no. (%)
T1	5 (13)
T2	4 (10)
T3	3 (8)
T4	17 (45)
TX	9 (24)
N-stage–no. (%)
N0	3 (8)
N1	3 (8)
N2	3 (8)
N3	19 (50)
NX	10 (26)
M-stage–no. (%)
M0	12 (32)
M1	26 (68)
Chemotherapy cycles given–no. (%)
< 4 cycles	3 (8)
≥ 4 cycles	35 (92)
Patients receiving radiotherapy–no. (%)
Prophylactic cranial radiation	19 (50)
Days Baseline-Follow-Up
Median	145
Range	107–259

Two patients withdrew their informed consent during the study period. However, these patients consented to the inclusion of their data in the study.

*Mean and standard deviation.

TNM staging = Tumor, lymph Node, and Metastasis.