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Table 1 Crude group comparison of orthopedic surgeries before, during and after the lockdown

From: Impact of a total lockdown for pandemic SARS-CoV-2 (Covid-19) on deep surgical site infections and other complications after orthopedic surgery: a retrospective analysis

 

Pre-lockdown

Lockdown

Post-lockdown

p valuesa

n = 5791

n = 2688

n = 230

n = 2873

 

Patients

Female sex

1311 (49%)

106 (46%)

1396 (49%)

0.74

Median age

53 years (18)

54 years (17)

53 years (18)

0.51

Diabetes mellitus

213 (8%)

27 (12%)

281 (10%)

0.02

Median body mass index

27.0 kg/m2 (5.3)

26.8 kg/m2 (6.0)

27.0 kg/m2 (5.3)

0.36

ASA-Score of 4 points

25 (1%)

5 (2%)

83 (3%)

0.01

Types of orthopedic surgery

   

0.01

Knee

526 (20%)

37 (16%)

541 (19%)

 

Foot and Ankle

523 (20%)

24 (10%)

571 (20%)

 

Spine

490 (18%)

56 (24%)

523 (18%)

 

Shoulder and Elbow

385 (14%)

39 (17%)

402 (14%)

 

Primary surgery

1250 (47%)

108 (47%)

1352 (47%)

0.66

Median duration of surgery

86 min (52)

89 min (53)

85 min (53)

0.33

Median duration of hospital stay

4.2 days (5.4)

4.5 days (7.3)

4.3 days (6.1)

0.17

Postoperative outcomes

Revision for deep surgical site infection

26 (1%)

4 (2%)

13 (0.5%)

0.02

Revision for wound healing disorders

19 (0.7%)

1 (0.4%)

19 (0.7%)

0.88

Revision for non-infectious complication

138 (5%)

8 (3%)

79 (3%)

0.01

Key non-SSI nosocomial infections

Bacterial pneumonia

9 (0.3%)

1 (0.4%)

13 (0.5%)

0.78

Urinary tract infections

7 (0.3%)

7 (3%)

13 (0.5%)

0.01

Secondary bloodstream infections

3 (0.1%)

1 (0.4%)

4 (0.1%)

0.44

  1. Percentages respectively standard deviations are given in brackets
  2. Significant results (p < 0.05) are indicated in bold and italic
  3. aKruskal–Wallis-tests