Table 2.

Patients demographics and oncologic outcomes of negative versus positive horizontal margins.

Variable	Negative	Positive	P
Number of patients	51	38
Age, years, median (IQR)	73 (68–79.5)	76 (71–78)	0.66
Sex, n (%)
Male	37 (73)	29 (76)	0.79
Female	14 (27)	9 (24)
Recurrent tumours, n (%)	9 (18)	4 (11)	0.38
Positive cytology, n (%)	11 (23)	9 (28)	0.79
Non‐papillary tumours, n (%)	8 (16)	4 (11)	0.55
Sessile tumours, n (%)	18 (35)	13 (34)	1
Multiple tumours, n (%)	20 (39)	23 (61)	0.06
Tumour diameter, mm, mean (SD)	19.5 (9.3)	21.4 (11.5)	0.38
Concomitant CIS, n (%)	12 (24)	23 (61)	<0.001
Follow‐up, months, median (IQR)	23 (11–37.5)	20 (13.25–33.75)	0.95
Recurrence, n (%)	14 (28)	18 (47)	0.07
Location of recurrence, n (%)
Original site	0	7 (39)	0.01
Distant	14 (100)	11 (61)
2‐year RFS, % (95% CI)	67.3 (49.7–79.9)	41.6 (22.6–59.6)	0.12