Imaging features and prognostic value of 18F-FDG PET/CT detection of soft-tissue metastasis from lung cancer: a retrospective study

Table 5 Prognostic significance of potential indicators of overall survival in patients with lung cancer

Variable	x²/Q^a	P-value	P-value (PH)^b
Age (years)	0.302	0.583	0.823
Sex (male vs. female)	< 0.001	0.998	0.305
ADC	3.608	< 0.001	0.004
SCLC	4.916	< 0.001	0.011
SUVmax of lung cancer	4.885	< 0.001	0.036
STM	1.383	0.340	0.032
Bone metastasis	1.353	0.245	0.264
Hepatic metastasis	0.974	0.653	0.042
Brain metastasis	13.037	< 0.001	0.799
Adrenal gland metastasis	15.425	< 0.001	0.080
Metastasis within the chest cavity	0.096	0.756	0.873
Other distant metastasis	2.567	0.109	0.234

ADC Adenocarcinoma, SCLC Small cell lung cancer, SUVmax Maximum standardized uptake value, STM Soft-tissue metastasis
^aStatistics for log-rank (satisfying the PH) or Renyi test (not satisfying the PH)
^bTest for assumption of proportional hazard (PH)
Statistically significant P-values are highlighted in bold

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