]>

Table 4: COX proportional multivariate analysis of factors associated with sarcomatoid carcinoma (carcinosarcoma) of the urinary bladder disease specific mortality.

Characteristics Group Hazard ratio 95% CI P value Age Continuous 1.01 0.99–1.03 .45 Gender Male 1.00 Female 1.26 0.75–2.11 .39 Ethnicity White 1.00 Others 1.28 0.58–2.83 .55 SEER Stage Localized 1.00 Regional 2.17 1.08–4.38 .03 Distant 8.86 4.03–19.51 $<$.0001 Unknown 1.72 0.64–4.62 .28 Married Yes 1.00 No 1.30 0.77–2.20 .33 Diagnose year 1973–1984 1.00 1985–1994 0.80 0.32–2.05 .65 1995–2004 1.15 0.47–2.82 .76 Cystectomy No 1.00 Yes 0.80 0.43–1.50 .49 Radiation No 1.00 Yes 1.15 0.64–2.09 .64 Combination* No 1.00 Yes 0.38 0.08–1.85 .23

HR $=$ Hazard ratio; CI $=$ Confidence interval *Combination $=$ combination therapy of cystectomy and radiation.