Risk factors related to postoperative recurrence of dermatofibrosarcoma protuberans: A retrospective study and literature review

Table 1 Clinical characteristics of 44 patients with dermatofibrosarcoma protuberans

Factor	Total	Primary group	Recurrent group	P value
Sex				0.741
Male	21	9	12
Female	23	11	12
Onset age (mean ± SEM, yr)	31.82 ± 1.64	30.90 ± 2.34	32.58 ± 2.24	0.616
Duration (mean ± SEM, mo)	82.09 ± 12.19	54.50 ± 15.40	105.08 ± 16.63	0.037
Tumor diameter (mean ± SEM, cm)	3.61 ± 0.46	2.25 ± 0.36	4.75 ± 0.70	0.004
Location				0.540
Trunk	26	12	14
Other sites	18	10	8

SEM: Standard error of the mean.