Table 2.

Univariate analyses of overall survival (OS) and cancer-specific survival (CSS).

Variables	OS			CSS
	5-year OS |(%)	Univariate analysis		5-year CSS (%)	Univariate analysis
		Log-rank χ2 test	p-Valuea		Log-rank χ2 test	p-Valuea
Marital status		179.80	<.001		157.27	<.001
Married	45.93			49.97
Divorced/Separated	41.39			45.85
Widowed	19.08			22.14
Never married	57.21			60.69
Age		502.70	<.001		359.36	<.001
<50	59.58			62.30
≥50	24.54			29.86
Sex		14.09	<.001		11.84	0.001
Male	46.07			50.00
Female	53.82			57.49
Grade		165.59	<.001		147.19	<.001
Well	85.35			87.31
Moderately	78.85			80.26
Poorly	48.44			53.21
Undifferentiated	48.11			51.48
Unknown	39.22			43.61
TNM stage		395.76	<.001		395.59	<.001
I	84.66			87.88
II	59.95			63.43
III	40.53			43.42
IV	9.79			11.24
Unknown	47.79			51.79
Surgery		431.45	<.001		366.54	<.001
No	21.42			25.64
Yes	57.54			60.83
Unknown	15.24			20.86

^aThe p-values compared married, divorced/separated, widowed, and never married calculated with the use of a log-rank χ² test.