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Table 2 Quality of erection following SBRT for prostate cancer (patient-reported responses to question 9 of the EPIC-26)

From: Potency preservation following stereotactic body radiation therapy for prostate cancer

Follow up (months) Start 3 6 9 12 18 24
Firm enough for intercourse 100.0% 73.7% 67.8% 66.7% 62.2% 57.0% 54.4%
Firm enough for masturbation and foreplay only 0.0% 9.5% 18.4% 17.2% 17.8% 26.6% 23.3%
Not firm for any sexual activity 0.0% 16.8% 13.8% 16.1% 20.0% 16.5% 22.2%
p   <0.0001 <0.0001 <0.0001 <0.0001 <0.0001 <0.0001
Total patient 97 95 87 87 90 79 90