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. Author manuscript; available in PMC: 2013 Dec 1.
Published in final edited form as: Int J Radiat Oncol Biol Phys. 2012 Sep 11;84(5):1060–1070. doi: 10.1016/j.ijrobp.2012.07.2354

Table 4.

Proportional Hazards Models for Propensity Matched Pairs of SABR Cases and Non-SABR Controls.

Overall Survival Lung Cancer-Specific Survival
Comparison HR 95%CI P>X2 HR 95%CI P>X2
Lobectomy v. SABR1 0.71 (0.45–1.12) 0.14 1.00 (0.40–2.52) >.99
Sublobar Resection v. SABR 0.82 (0.53–1.27) 0.38 2.14 (0.87–5.26) 0.10
Conventional XRT v. SABR 1.97 (1.31–2.96) 0.001 1.56 (0.67–3.59) 0.30
 Adj for Age and Grade 1.96 (1.28–3.00) 0.002 1.59 (0.67–3.80) 0.30
Observation v. SABR 2.10 (1.37–3.08) <.001 3.88 (1.78–8.43) <.001
 Adj for Tumor Size 2.03 (1.34–3.07) <.001 3.90 (1.76–8.61) <.001

Abbreviations: HR, hazard ratio; CI, confidence interval; adj, adjustment; SABR, stereotactic ablative radiation; XRT, radiation.

1

SABR is the referent group for all comparisons.