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Table 2 Statistically significant differences between those diagnosed with Covid-19 pre-surgery compared to those diagnosed post-operatively. All definitions as per NACSA and ICNARC datasets

From: Cardiac surgery outcome during the COVID-19 pandemic: a retrospective review of the early experience in nine UK centres

Variable

Covid-19 positive pre-surgery Frequency (%)/mean ± SD or Median[IQR] (n = 17)

Covid-19 positive post-surgery Frequency (%)/mean ± SD or Median[IQR] (n = 35)

p (Covid-19 positive vs Covid-19 negative)

Demographics

 Age (years/median [IQR])

60 [45–65]

70 [57–74]

0.029

 Female gender

2 (11.8)

2 (5.7)

0.589

 Ethnicity

  White

8 (80.0)

22 (95.7)

0.212

  Asian

0 (0.0)

0 (0.0)

 

  Black

2 (20.0)

1 (4.4)

 

  Other

0 (0.0)

0 (0.0)

 

Cardiac risk factors

 BMI (kg/m2/median [IQR])

25.6 [24.7–28.3]

27.4 [25–33]

0.084

Examination and investigation

 Pre-op heart rhythm

  Sinus rhythm

16 (94.1)

28 (80.0)

0.030

  Atrial fibrillation/flutter

0 (0.0)

7 (20.0)

 

  Complete heart block/pacing

1 (5.9)

0 (0.0)

 

  Ventricular fibrillation/tachycardia

0 (0.0)

0 (0.0)

 

  Other abnormal rhythm

0 (0.0)

0 (0.0)

 

Pre-operative risk assessment

 EuroSCORE (median [IQR])

2.8 [1.6–6.4]

4.9 [2.5–6.5]

0.400

Intra-operative details

 Aortic cross clamp time (minutes)

72 [45–84]

92 [75–139]

0.017

Outcome

 Number of days ventilated

1 [1–2]

2 [1–5]

0.017

 Post-operative length of stay (days)

7 [5–11]

12 [7–21]

0.024

 In-hospital mortality

0 (0)

13 (37.1)

0.005