Table 7.

The wound complication rates between the two groups in routine primary TKA

	Drain use (n = 4540)	No drain (n = 1785)	P value
Non-infectious complications, N (%)
Fat liquefies and wound effusion	183 (4.03%)	74 (4.15%)	0.835%
Wound necrosis	69 (1.52%)	26 (1.46%)	0.852%
Hematoma	112 (2.47%)	48 (2.69%)	0.613%
Infectious complications, N (%)
Superficial wound infection	59 (1.23%)	21 (1.18%)	0.693%
PJI within a month postoperatively	4 (0.09%)	1 (0.06%)	1.000%

PJI periprosthetic joint infection