Table:
Characteristic	n	Radiotherapy	p
No (%)	Preoperative (%)	Postoperative (%)
Sex
Male	198	35 (66.0)	89 (64.5)	74 (73.3)	0.341
Female	94	18 (34.0)	49 (35.5)	27 (26.7)
Age
Mean ± SD (years)	57 ± 16.8	67 ± 17.2	54 ± 16.3	55 ± 15.2	<0.001
Race
White	224	40 (75.5)	99 (71.7)	85 (84.2)	0.095
Black	23	5 (9.4)	10 (7.2)	8 (7.9)
Other and unknown	45	8 (15.1)	29 (21.0)	8 (7.9)
Tumor grade
G1–2	20	3 (5.7)	7 (5.1)	10 (9.9)	0.118
G3–4	237	47 (88.7)	108 (78.3)	82 (81.2)
Unknown	35	3 (5.7)	23 (16.7)	9 (8.9)
Tumor size (mm)
Mean ± SD	53.5 ± 25.1	55.4 ± 26.6	53.3 ± 25.6	52.8 ± 23.9	0.835
Number of RLNs (n)
Mean ± SD	14.8 ± 11.6	13.3 ± 10.0	13.9 ± 10.1	16.9 ± 13.9	0.080
Number of PLNs (n)
Mean ± SD	6.7 ± 7.2	8.3 ± 9.2	5.2 ± 5.8	7.9 ± 7.2	0.003
Tumor stage
II	51	11 (20.8)	29 (21.0)	11 (10.9)	0.099
III	241	42 (79.2)	109 (79.0)	90 (89.1)

Parse the following content of the illustration in markdown code: | Characteristic | n | <COLSPAN=3> Radiotherapy | p | 
 |  |  | No (%) | Preoperative (%) | Postoperative (%) |  | 
 | --- | --- | --- | --- | --- | --- | 
 | <COLSPAN=6> Sex | 
 | Male | 198 | 35 (66.0) | 89 (64.5) | 74 (73.3) | 0.341 | 
 | Female | 94 | 18 (34.0) | 49 (35.5) | <COLSPAN=2> 27 (26.7) | 
 | <COLSPAN=6> Age | 
 | Mean ± SD (years) | 57 ± 16.8 | 67 ± 17.2 | 54 ± 16.3 | 55 ± 15.2 | <0.001 | 
 | Race |  |  |  |  |  | 
 | White | 224

| 40 (75.5) | 99 (71.7) | 85 (84.2) | 0.095 | 
 | Black | 23 | 5 (9.4) | 10 (7.2) | 8 (7.9) |  | 
 | Other and unknown | 45 | 8 (15.1) | 29 (21.0) | 8 (7.9) |  | 
 | <COLSPAN=6> Tumor grade | 
 | G1–2 | 20 | 3 (5.7) | 7 (5.1) | 10 (9.9) | 0.118 | 
 | G3–4 | 237 | 47 (88.7) | 108 (78.3) | 82 (81.2) |  | 
 | Unknown | 35 | 3 (5.7) | 23 (16.7) | 9 (8.9) |  | 
 | <COLSPAN=6> Tumor size (mm) | 
 | Mean ± SD | 53.5 ± 25.1 | 55.4 ± 26.6 | 53.3 ± 25.6 | 52.8 ± 23.9 | 0.835 | 
 | Number of RLNs (n) |  |  |  |  |  | 
 | Mean ± SD | 14.8 ± 11.6 | 13.3 ± 10.0 | 13.9 ± 10.1 | 16.9 ± 13.9 | 0.080 | 
 | Number of PLNs (n) |  |  |  |  |  | 
 | Mean ± SD | 6.7 ± 7.2 | 8.3 ± 9.2 | 5.2 ± 5.8 | 7.9 ± 7.2 | 0.003 | 
 | <COLSPAN=6> Tumor stage | 
 | II | 51 | 11 (20.8) | 29 (21.0) | 11 (10.9) | 0.099 | 
 | III | 241 | 42 (79.2) | 109 (79.0) | <COLSPAN=2> 90 (89.1) |