Table 1.

Baseline characteristics of patients with PV vs HCs

CharacteristicsGroupP value
PVHCs
Patients, N 102 42  
Sex    
Female, n (%) 45 (44.1) 17 (40.5) .72 
Age, y    
Median (range) 70 (31-85) 71 (66-74) .083  
Body mass index, kg/m2    
Mean (SD) 26.0 (3.9) 24.9 (2.4) .34  
Smoking    
Current smoker, n (%) 8 (7.8) 1 (2.4) .28 
Former smoker, n (%) 43 (42.2) 13 (31) .35 
Never smoker, n (%) 50 (49) 26 (61.9) .28 
Unknown, n (%) 1 (1) 2 (4.8)  
Hypertension    
Yes, n (%) 55 (53.9) 16 (38.1) .1 
No, n (%) 47 (46.1) 26 (61.9) .36 
Unknown, n (%) 0 (0) 0 (0)  
Comorbidity index     
Median (range) 1 (0-9) 0 (0-4) .058  
n (%)    
No comorbidities (CCI = 0) 36 (35.3) 22 (52.4) .064 
Low burden (CCI = 1-2) 42 (41.2) 16 (38.1) .85 
Moderate to high (CCI > 2) 24 (23.5) 4 (9.5) .065 
Blood test    
Leukocyte, ×109/L    
Median (range) 5.7 (2.5-21.8) 6.2 (4.5-9.4) .15  
Hematocrit, %    
Mean (SD) 42 (4) 43 (3) .037  
Thrombocyte, ×109/L    
Median (range) 309 (113-884) 227 (125-355) <.001  
eGFR    
Mean (SD) 78.2 (16.5) 73.1 (13.2) .14  
CharacteristicsGroupP value
PVHCs
Patients, N 102 42  
Sex    
Female, n (%) 45 (44.1) 17 (40.5) .72 
Age, y    
Median (range) 70 (31-85) 71 (66-74) .083  
Body mass index, kg/m2    
Mean (SD) 26.0 (3.9) 24.9 (2.4) .34  
Smoking    
Current smoker, n (%) 8 (7.8) 1 (2.4) .28 
Former smoker, n (%) 43 (42.2) 13 (31) .35 
Never smoker, n (%) 50 (49) 26 (61.9) .28 
Unknown, n (%) 1 (1) 2 (4.8)  
Hypertension    
Yes, n (%) 55 (53.9) 16 (38.1) .1 
No, n (%) 47 (46.1) 26 (61.9) .36 
Unknown, n (%) 0 (0) 0 (0)  
Comorbidity index     
Median (range) 1 (0-9) 0 (0-4) .058  
n (%)    
No comorbidities (CCI = 0) 36 (35.3) 22 (52.4) .064 
Low burden (CCI = 1-2) 42 (41.2) 16 (38.1) .85 
Moderate to high (CCI > 2) 24 (23.5) 4 (9.5) .065 
Blood test    
Leukocyte, ×109/L    
Median (range) 5.7 (2.5-21.8) 6.2 (4.5-9.4) .15  
Hematocrit, %    
Mean (SD) 42 (4) 43 (3) .037  
Thrombocyte, ×109/L    
Median (range) 309 (113-884) 227 (125-355) <.001  
eGFR    
Mean (SD) 78.2 (16.5) 73.1 (13.2) .14  

CCI, Charlson Comorbidity Index; eGFR, estimated glomerular filtration rate; SD, standard deviation.

Pairwise Wilcoxon rank sum test.

Analysis of variance with post hoc Tukey honest significant difference test.

Comorbidity scores were calculated using CCI.

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