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Table 3 Pulmonary function data before and 1 year after cardiac surgery (n = 150)

From: Pulmonary function and health-related quality of life 1-year follow up after cardiac surgery

  Before surgery 1 year after surgery 1 year after surgery Preoperative to postoperative change in pulmonary function (% predicted)
Mean ± SD Mean ± SD Mean ± SD CI for the change [95 % CI] P-value
(% predicted) (% predicted) (% preoperative values)
VC (l) 4.1 ± 1.0 4.0 ± 1.0 97.5 ± 8.3 % −1.7 ± 9.0 % [−3.1 – -0.2] 0.025
(104.4 ± 16.8) (102.8 ± 17.2) 98.7 ± 9.0 %
FVC (l) 3.9 ± 1.0 3.7 ± 1.0 96.4 ± 10.8 % −2.9 ± 11.0 % [−4.6 – -1.1] 0.002
(103.5 ± 18.1) (100.6 ± 18.6) 97.8 ± 11.3 %
FEV1 (l) 2.9 ± 0.8 2.7 ± 0.8 94.8 ± 10.6 % −4.1 ± 10.5 % [−5.8 – -2.4] <0.001
(98.2 ± 19.5) (94.2 ± 20.5) 96.1 ± 11.0 %
FEV1/VC (%) 71.0 ± 8.5 68.9 ± 8.8 97.3 ± 7.5 % −2.5 ± 6.5 % [−3.6 – -1.5] <0.001
(94.0 ± 11.1) (91.5 ± 11.5) 97.4 ± 7.2 %
PEF (l/min) 542.4 ± 145.7 526.4 ± 136.1 98.2 ± 13.1 % −2.8 ± 16.2 % [−5.4 – -0.2] 0.035
(117.2 ± 26.6) (114.4 ± 23.7) 99.0 ± 14.6 %
IC (l) 3.1 ± 0.8 3.1 ± 0.8 101.4 ± 14.5 % 1.7 ± 15.7 % [−0.8 – 4.3] 0.181
(108.5 ± 20.8) (110.2 ± 22.9) 102.4 ± 15.1 %
FRC (l) 3.4 ± 0.8 3.3 ± 0.8 97.6 ± 11.5 % −3.0 ± 11.2 % [−4.8 – -1.2] 0.001
(98.6 ± 19.7) (95.6 ± 19.0) 97.6 ± 11.3
RV (l) 2.5 ± 0.7 2.5 ± 0.6 101.0 ± 16.9 % −1.3 ± 15.7 %[−3.9 – 1.2] 0.314
(102.4 ± 24.4) (101.1 ± 22.6) 100.2 ± 16.3 %
TLC (l) 6.5 ± 1.3 6.4 ± 1.3 98.8 ± 7.8 % −1.5 ± 11.5 % [−3.4 – 0.3] 0.107
(99.3 ± 13.5) (97.8 ± 15.7) 98.8 ± 11.7 %
  1. Data are presented as mean ± SD [95 % CI of the difference]. P-values refer to the difference between preoperative and postoperative values (percentage predicted). P-value < 0.05 was considered significant
  2. CI confidence interval, FEV 1 forced expiratory volume in 1 s, FVC forced vital capacity, FRC functional residual capacity, IC inspiratory capacity, PEF peak expiratory flow, RV residual volume, TLC total lung capacity, VC vital capacity