Table 4.

Cancer specific and overall survival for stage IIA, IIB, and III

	Cancer specific survival				Overall survival
	Unadjusted HR (95% CI)	p-value	PS-adjusted HR* (95% CI)	p-value	Unadjusted HR (95% CI)	p-value	PS-adjusted HR* (95% CI)	p-value
Stage IIA
Definitive RT versus others (reference)	1.65 (1.36–2.00)	<0.001	1.54 (1.25–1.91)	<0.001	1.68 (1.42–1.99)	<0.001	1.56 (1.30–1.88)	<0.001
Surgery+RT versus surgery only (reference)	0.87 (0.65–1,17)	0.37	0.99 (0.72–1.37)	0.97	0.80 (0.62–1.03)	0.08	0.92 (0.69–1.21)	0.54
Preoperative RT vs. postoperative RT (reference)	1.14 (0.69–1.87)	0.61	1.00 (0.59–1.69)	0.99	1.14 (0.73–1.78)	0.56	1.06 (0.66–1.71)	0.81
Stage IIB
Definitive RT versus others (reference)	1.61 (1.23–2.12)	0.001	1.46 (1.08–1.97)	0.01	1.72 (1.34–2.21)	<0.001	1.51 (1.15–1.99)	0.003
Surgery+RT versus surgery only (reference)	0.90 (0.58–1.41)	0.65	0.68 (0.39–1.21)	0.19	0.89 (0.59–1.34)	0.58	0.79 (0.47–1.33)	0.38
Preoperative RT vs. postoperative RT (reference)	0.66 (0.33–1.32)	0.24	0.45 (0.19–1.07)	0.07	0.75 (0.39–1.44)	0.38	0.72 (0.32–1.62)	0.43
Stage III
Definitive RT versus others (reference)	1.60 (1.37–1.87)	<0.001	1.45 (1.22–1.72)	<0.001	1.55 (1.35–1.79)	<0.001	1.37 (1.17–1.60)	<0.001
Surgery+RT versus surgery only (reference)	0.56 (0.44–0.73)	<0.001	0.62 (0.47–0.81)	0.001	0.55 (0.44–0.69)	<0.001	0.62 (0.48–0.79)	<0.001
Preoperative RT vs. postoperative RT (reference)	0.73 (0.51–1.04)	0.08	0.93 (0.63–1.36)	0.70	0.72 (0.53–1.00)	0.05	0.91 (0.64–1.28)	0.59

RT: radiation therapy. Included into the propensity score calculation: gender, age, race, ethnicity, marital status, tumor grade, tumor location, T-stage, N-stage, and year of diagnosis (5 groups).

^*Covariates: propensity score, gender, age, race, ethnicity, marital status, tumor grade, tumor location, T-stage, N-stage, and year of diagnosis (5 groups).