Table 4.

Kaplan Meier analysis of factors affecting overall survival in patients with renal cell carcinoma

Factor tested	Patient group	Total N	Mean survival (±SE)	95% C.I.	χ2	Log Rank test (Mantel-Cox)
Number of primary tumors	OPC	42,314	111±1 months	109–113 months	691.4	P<0.001
	SPC	5,769	151±2 months	147–155 months
Age at diagnosis of RCC	<60 years	20,243	173±1.7 months	170–176 months	4,007.7	P<0.001
	≥60 years	37,931	76±0.6 months	74.6–77 months
Race	White	49,317	110±0.8 months	108–111 months	18.3	P<0.001
	Black	5,903	106±2.5 months	101–111 months
	Others	2,761	115±3.5 months	108.5–122 months
Gender	Male	36,630	104±1 months	102–106 months	75.7	P<0.001
	Female	21,544	119.5±1.4 months	117–122 months
Marital status at time of diagnosis of RCC	Married	36,410	121±1 months	119–123 months	1562.0	P<0.001
	Widowed	8,754	62±1.2 months	60–64 months
	Divorced	4,307	103±2.6 months	118–130 months
	Single	5,955	124±3 months	118–129.5 months
	Separated	590	91±5.6 months	80–102 months
Summary stage (2004+)	Localized	15,112	81±0.4 months	80.5–82 months	14,845.0	P<0.001
	Regional spread	3,966	58.5±0.8 months	57–55 months
	Distant spread	6,328	13±0.3 months	12–14 months
Grade of RCC	Well differentiated	4,911	179±3.5 months	172–186 months	2385.0	P<0.001
	Moderately differentiated	10,631	154±2.9 months	148–159 months
	Poorly differentiated	5,882	98.5±3 months	93–104 months
	Undifferentiated	1,591	67±3.8 months	59.5–74 months
Size of tumor	≤5cm	12,948	124±1 months	122–126 months	1955.3	P<0.001
	>5cm-≤10cm	13,410	97±0.9 months	96–99 months
	>10cm	5,561	66±1.2 months	63–68 months
Unilateral or Bilateral RCC	Unilateral	56,308	113±0.8 months	111–114 months	3052.3	P<0.001
	Bilateral	1,866	22±1.6 months	19–25 months
Radiation therapy given?	Yesc	4,898	26±1 months	24–27 months	5057.4	P<0.001
	No	52,214	119±0.9 months	117–121 months
Radiation sequence with surgery	Received both	2,092	45±1.8 months	41.5–49 months	727.3	P<0.001
	Received neither	56,078	113±0.8 months	111–114 months

Number of patients (N), only primary cancer (OPC), Secondary primary cancer (SPC), Well differentiated (WD), moderately differentiated (MD), poorly differentiated (PD),

^aBlack, American Indian, Alaskan Native, Asian, Pacific islander

^bRegional or distant spread of tumor

^cReceived either radiation or radioisotope therapy