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Table 1 Preoperative patient characteristics

From: Quantifying the learning curve for pulmonary thromboendarterectomy

  Overall Tercile (T) P value
Variable (n = 134) T1 (n = 44) T2 (n = 45) T3 (n = 45) T1 vs. T3
Age (y) 54 ± 15 54 ± 14 54 ± 14 53 ± 16 0.757
Male Sex (%) 81 (60.4) 22 (50.0) 32 (71.1) 27 (60.0) 0.343
PAP (mm Hg)
 Systolic 78 ± 20 77 ± 19 78 ± 21 78 ± 20 0.778
 Diastolic 28 ± 9 26 ± 10 30 ± 8 27 ± 9 0.882
PVR (dynes-sec-cm−5) 639 ± 373 695 ± 442 618 ± 371 602 ± 292 0.243
CO (L/min) 4.7 ± 1.5 4.5 ± 1.5 4.8 ± 1.4 4.7 ± 1.5 0.531
DLCO (% predicted) 64 ± 19 66 ± 17 67 ± 20 56 ± 18 0.011
NYHA class
 I 1 (0.7) 0 (0) 1 (2.2) 0 (0) 0.218
 II 43 (32.1) 17 (38.6) 14 (31.1) 12 (26.7)  
 III 74 (55.2) 21 (47.7) 26 (57.8) 27 (60.0)  
 IV 15 (11.2) 6 (13.6) 3 (6.7) 6 (13.3)  
Jamieson classification
 Type 1 1 (0.7) 0 (0) 1 (2.2) 0 (0) 0.226
 Type 2 64 (47.8) 24 (54.5) 20 (44.4) 20 (44.4)  
 Type 3 61 (45.5) 20 (45.5) 17 (37.8) 24 (53.3)  
 Type 4 0 (0) 0 (0) 0 (0) 0 (0)  
  1. Data are shown as mean ± standard deviation or numbers (percentages)
  2. PAP pulmonary artery pressure, PVR pulmonary vascular resistance, CO cardiac output, DLCO diffusing capacity of carbon monoxide, NYHA New York Heart Association