Knee Surgery during the COVID-19 Lockdown—Experiences of a Level-One Trauma Center in Germany

Table 4

Surgical procedures (Jan: January; Feb: February).

	Jan; 2017-2019; Mean (SD)	Jan 2020	Feb; 2017-2019; Mean (SD)	Feb 2020	March; 2017-2019; Mean (SD)	March 2020	April; 2017-2019; Mean (SD)	April 2020	May; 2017-2019; Mean (SD)	May; 2020
Osteosynthesis	3.3 (2.5)	4	7.7 (4.2)	8	8.0 (3.5)	3.0	6.3 (3.2)	2.0	3.7 (1.5)	4.0
Arthroplasty	0.3; (0.6)	0	2.0 (1.7)	4	1.3 (1.5)	3.0	1.7 (0.6)	0.0	0.7 (1.2)	2.0
Reconstructive surgery	15.3 (5.9)	12	18.7 (1.5)	10	10.7 (7.1)	4.0	13.7 (8.4)	2.0	16.0 (8.9)	9.0
Septic surgery	0.0	0	1.0 (1.7)	2	1.7 (1.2)	4.0	3.7 (2.1)	0.0	1.7 (1.2)	4.0
Tumor surgery	0.0	0	0.0	0	0.3 (0.6)	0.0	1.0 (1.0)	0.0	0.0	0.0
Total	19.0 (7.9)	16	29.3 (2.9)	24	22.0 (9.0)	14.0	26.3 (13.6)	4.0	22.0 (10.6)	19.0
Delta (%)	-15.8		-18.2		-36.4		-84.8		-13.6

Delta is defined as the percentage difference between the respective total values of the period 2017-2019 versus 2020 ().