Predicting 2-year survival in stage I-III non-small cell lung cancer: the development and validation of a scoring system from an Australian cohort

Table 3 Odds ratios of SWSM for overall survival by multivariate analysis

Variable	β coefficient	SE	OR	Log OR	95% CI	p-value
ECOG performance status						0.1
0			1.00 (Reference)	0.00 (Reference)
1	− 0.43	0.3	0.65	− 0.19	0.36–1.16	0.14
≥ 2	0.24	0.31	1.28	0.11	0.70–2.31	0.43
DLCO	− 0.014	0.006	0.99	− 0.004	0.97–1.00	0.022
Histological diagnosis						0.078
Squamous cell carcinoma			1.00 (Reference)	0.00 (Reference)
Adenocarcinoma	− 0.57	0.26	0.57	− 0.24	0.34–0.95	0.031
Other	− 0.48	0.41	0.62	− 0.21	0.28–1.38	0.24
Tumour lobe						0.059
Upper			1.00 (Reference)	0.00 (Reference)
Middle/lower	0.47	0.25	1.61	0.21	0.98–2.62
EQD₂	− 0.025	0.006	0.98	− 0.009	0.96–0.99	< 0.001

SWSM = South West Sydney Model; SE = standard error; OR = odds ratio; CI = confidence interval; ECOG = Eastern Cooperative Oncology Group; DLCO = diffusing capacity of the lung for carbon monoxide; EQD₂₌ equivalent dose in 2 Gy fractions

ISSN: 1748-717X