Table 1.

Number of missing values for the variables of interest

Variable	Size	Missing data	Perc.
Cause of death	Deceased: 322	161	50 %
PSA at diagnosis	All: 2844	177	6.2 %
cT stage		589	20.7 %
cN stage		1815	63.8 %
cM stage		386	13.6 %
First treat.		292	10.3 %
Gleason		78	14.6 %
PSA after treat.		770	27.1 %
pT stage	Those who had surgery: 1521	92	6 %
pN stage		601	39.5 %

Perc. percentage, treat. treatment, diag. diagnosis