Table 2 Univariate and multivariable Cox proportional hazard model for PUI

All-cause mortality

 Non-adjusted

1.495(1.268–1.764)

< 0.001*

 Adjusted model I

1.446(1.210–1.726)

< 0.001*

 Adjusted model II

1.470(1.231–1.756)

< 0.001*

 PSM non-adjusted

1.320(1.037–1.680)

0.024*

 PSM adjusted model I

1.520(1.156–2.000)

0.003*

 PSM adjusted model II

1.618(1.224–2.141)

0.001*

Cancer-specific mortality

 Non-adjusted

1.880(1.500–2.357)

< 0.001*

 Adjusted model I

1.816(1.423–2.318)

< 0.001*

 Adjusted model II

1.817(1.423–2.320)

< 0.001*

 PSM non-adjusted

1.870(1.297–2.696)

0.001*

 PSM adjusted model I

1.892(1.255–2.852)

0.002*

 PSM adjusted model II

2.114(1.382–3.233)

0.001*