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

Table 3

Pathologies (Jan: January; Feb: February).

	Jan; 2017-19; 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
Fracture	3.3 (2.5)	4	6.7 (4.2)	7	6.7 (2.1)	3	5.3 (2.5)	2	3.0 (2.0)	5
Soft tissue	8.7 (2.9)	7	9.3 (2.5)	4	7.3 (6.1)	4	9.3 (5.5)	2	10.3 (11.0)	9
Cartilage	2.0 (1.0)	1	3.7 (2.5)	5	1.0 (1.0)	0	2.0 (1.0)	0	1.0 (1.0)	1
Osteoarthritis	0.3 (0.6)	0	2.0 (2.0)	3	0.3 (0.6)	2	1.3 (0.6)	0	1.3 (1.2)	0
Malalignment	0.7 (0.6)	0	0.0	0	1.0 (1.0)	0	0.7 (0.6)	0	0.3 (0.6)	0
Septic	0.0	0	1.3 (1.5)	2	2.7 (0.6)	4	3.3 (2.3)	0	2.3 (1.2)	2
Knee luxation	1.3 (1.5)	1	2.3 (2.5)	0	0.3 (0.6)	0	1.0 (1.0)	0	1.3 (2.3)	0
Tumor	0.0	0	0.3 (0.6)	0	0.3 (0.6)	0	1.0 (1.0)	0	0.0	0
Total	16.3 (5.9)	13	25.7 (3.5)	21	19.7 (10.0)	13	24.0 (11.5)	4	19.7 (12.4)	17
Delta (%)	-20.2		-18.3		-34.0		-83.3		-13.7

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