Table 2 Cox regression models for overall survival in all patients, in all NSCLC patients and in stage IV NSCLC patients,

Age^e

0.235

Sex^f

0.987

Histology^g

0.099

Metastasis^h

3.9 × 10⁻¹¹

sTREM-1ⁱ

1.48

1.06–2.06

0.020

Subpopulation A (n = 137)

HR ^b

FWD ^a

95% CI ^c

p ^d

Age^e

0.058

Sex^f

0.816

sTREM-1ⁱ

1.6

1.08–2.39

0.011

Stage

4.9 × 10⁻¹¹

  1 vs. 2

1.8

0.61–5.17

  2 vs. 3

3.0

1.38–6.64

  3 vs. 4

8.3

3.81–18.01

  AC^j

0.163

  SCC^k

0.388

  LCC^l

0.081

Subpopulation D (n = 75)

HR ^b

FWD ^a

95% CI ^c

p ^d

Age^e

0.518

Sex^f

0.175

sTREM-1ⁱ

1.94

1.17–3.2

0.008

  AC^j

0.193

  SCC^k

0.706

  LCC^l

0.137