Table 3 Cardiopulmonary exercise test characteristics after propensity score matching.

From: Association between the COVID-19 pandemic and cardiopulmonary function in acute coronary syndrome patients without SARS-CoV-2 infection

Characteristic

Pre-pandemic

During-pandemic

Post-pandemic

P

n = 1,503

n = 1,503

n = 1,503

Peak VO2, L/min

1.14 (0.31)

1.12 (0.34)

1.17 (0.35)*,†

< 0.001

Peak VO2/kg, ml/min/kg

15.56 (3.74)

15.07 (4.09)*

15.69 (4.04)†

< 0.001

Peak METs

4.44 (1.07)

4.31 (1.17)*

4.48 (1.15)†

< 0.001

AT METs

3.43 (0.46)

3.37 (0.56)*

3.38 (0.60)*

0.006

AT VO2/kg, ml/min/kg

10.88 (2.03)

10.73 (2.33)

11.25 (2.41)*,†

< 0.001

AT O2 pulse, ml/min/beat

8.11 (1.70)

7.82 (1.96)*

8.01 (2.04)†

< 0.001

Peak O2 pulse, ml/min/beat

9.69 (2.31)

9.27 (2.49)*

9.38 (2.55)*

< 0.001

Borg score

16.13 (1.38)

16.28 (2.34)

14.95 (5.31)*,†

< 0.001

Weber Grade, No. (%)

   

< 0.001

A

197 (13.11%)

162 (10.78%)

221 (14.70%)§

 

B

574 (38.19%)

579 (38.52%)

599 (39.85%)‡

 

C

676 (44.98%)

630 (41.92%)‡

596 (39.65%)

 

D

56 (3.73%)

132 (8.78%)‡

87 (5.79%)‡,§

 
  1. Bold value indicates a statistically significant difference.
  2. A p-values of the relationship trends of the three groups of variables are also given in the table.
  3. Symbols denote significant differences from the pre-pandemic group (*P <.05; and ‡P <.0167), during-pandemic group (†P <.05 and §P <.0167).
  4. Data are mean ± SD, median (interquartile range), or number (%).
  5. Abbreviations: Peak VO2, peak oxygen uptake; Peak VO2/kg, peak oxygen uptake per kilogram; Peak METs, peak Metabolic Equivalent; AT VO2/kg, oxygen uptake per kilogram at anaerobic threshold; AT O2 pulse, Oxygen pulse at anaerobic threshold; Peak O2 pulse, Peak Oxygen pulse.
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