Table 1 The baseline characteristics of study population.
From: Low neutrophil-to-lymphocyte ratio identifies secondary polycythemia in patients with erythrocytosis
Total (n = 655) | PV (n = 168) | SP (n = 487) | p value | |
|---|---|---|---|---|
Age (years) | 54.68 ± 15.46 | 65.47 ± 11.68 | 50.96 ± 14.85 | < 0.001 |
Male | 527 (80.46%) | 92 (54.76%) | 435 (89.32%) | < 0.001 |
BMI (kg/m2) | 25.71 ± 4.1 | 23.83 ± 3.54 | 26.38 ± 4.07 | < 0.001 |
Current smoker | 206 (31.45%) | 15 (8.93%) | 191 (39.22%) | < 0.001 |
JAK2 positive | 165 (25.19%) | 165 (98.21%) | 0 (0%) | < 0.001 |
Laboratory data | ||||
WBC (/µL) | 9775.82 ± 5253.35 | 15,230.06 ± 7013.58 | 7894.27 ± 2530.56 | < 0.001 |
Neutrophil (%) | 61.96 ± 12.16 | 74.82 ± 9.09 | 57.52 ± 9.67 | < 0.001 |
Lymphocyte (%) | 27.14 ± 10.94 | 15.04 ± 7.24 | 31.32 ± 8.67 | < 0.001 |
Absolute neutrophil count (/µL) | 6462.44 ± 4831.80 | 11,720.72 ± 6453.40 | 4648.49 ± 2061.80 | < 0.001 |
Absolute lymphocyte count (/µL) | 2290.84 ± 831.17 | 1993.78 ± 729.18 | 2393.32 ± 840.19 | 0.031 |
Hemoglobin (g/dL) | 18.22 ± 1.36 | 18.4 ± 1.78 | 18.15 ± 1.18 | 0.0864 |
Hematocrit (%) | 54.13 ± 4.58 | 57.08 ± 5.54 | 53.12 ± 3.69 | < 0.001 |
Platelet (/µL) | 309,834.35 ± 212,901.82 | 555,410.71 ± 287,301.16 | 225,118.07 ± 67,778.47 | < 0.001 |
CRP (mg/dL) | 0.31 ± 1.28 | 0.31 ± 1.27 | 0.31 ± 1.28 | 0.9725 |
NLR | 3.44 ± 4.07 | 6.72 ± 5.57 | 2.24 ± 2.45 | < 0.001 |
Subnormal EPO | 139 (21.55%) | 115 (71.88%) | 24 (4.95%) | < 0.001 |
