Table 3.

Association between Surgical Treatment and Patient Variables for the model creating the Surgical Selection Score (SSS).

Variable	Odds ratio (95% CI)	Sample patient SSS*	Variable	Odds ratio (95% CI)	Sample patient SSS*
Clinical T Status			Charlson Index
1	2.8 (2.6–3.0)		0	Reference	0
2	3.1 (3.0–3.3)		1	1.3 (1.3–1.3)
3	2.4 (2.3–2.6)		2	1.0 (1.0–1.1)
4	Reference	0	Race
X	1.2 (1.1–1.3)		White	1.4 (1.3–1.5)
Tumor Size			Other	1.4 (1.2–1.5)
T1a	2.2 (2.1–2.3)		Black	Reference	0
T1b	1.7 (1.6–1.8)		Insurance Status
T2a	1.2 (1.1–1.2)		Private	2.0 (1.9–2.2)
T2b	1.0 (1.0–1.1)		Medicare	1.6 (1.4–1.7)
T3	Reference	0	Medicaid	1.2 (1.1–1.4)
Clinical Nodal Status			Other Government	1.2 (1.0–1.4)
0	14.3 (13.2–15.5)	266	Not Insured	Reference	0
1	11.4 (10.4–12.4)		Income
2	4.7 (4.4–5.1)		High	1.2 (1.1–1.2)
3	Reference		Middle	1.0 (1.0–1.1)
X	5.7 (5.2–6.4)		Low	Reference	0
Clinical M Status			Facility Type
0	15.6 (14.3–17.1)	275	Academic/Research Program	1.7 (1.6–1.8)
1	1.9 (1.7–2.1)		Compreh. Com. Cancer Program	1.2 (1.2–1.3)
1A	2.1 (1.8–2.4)		Community Cancer Program	Reference	0
1B	Reference
Histology
Squamous Cell Carcinoma	1.8 (1.7–1.9)
Adenocarcinoma	2.2 (2.1–2.3)
NSCLC, NOS	Reference	0
Age group
<52	6.1 (5.6–6.7)	181
52–59	4.9 (4.5–5.4)
59–67	4.1 (3.8–4.5)
67–75	3.4 (3.1–3.7)
75–81	2.3 (2.1–2.5)
>81	Reference
Surgical Selection Score		722

^*The SSS was created by multiplying the logarithm of the odds ratios by 100 and adding the total. The sample SSS is provided for a 50 year old, black man with Stage IIIA (T4N0M0) NSCLC NOS, with Charlson Index =0 and belonging to the reference group for all remaining factors. His SSS is 722 and estimated probability of surgical treatment is 4.5%. (Sample SSS calculation for the patient described: ((ln 14.3 × 100) + (ln 15.6 × 100) + (ln 6.1 × 100)) = 722).