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Table 2 Patients With Elevated Hematocrit Levels and WBC Counts During the Follow-Up Period

From: Cytoreductive treatment patterns among US veterans with polycythemia vera

Laboratory Value, n/N (%)a Patients With PV
≥1 elevated hematocrit levelb
 12-month follow-up period 5350/6230 (85.9)
 24-month follow-up period 6167/6974 (88.4)
 36-month follow-up period 6397/7115 (89.9)
 48-month follow-up period 6492/7140 (90.9)
 Entire follow-up period 6544/7142 (91.6)
≥1 elevated WBC countc
 12-month follow-up period 2163/6280 (34.4)
 24-month follow-up period 2851/6966 (40.9)
 36-month follow-up period 3239/7113 (45.5)
 48-month follow-up period 3494/7136 (49.0)
 Entire follow-up period 3671/7137 (51.4)
  1. PV polycythemia vera, WBC white blood cell
  2. aN represents patients with evaluable laboratory data
  3. bDefined as hematocrit ≥45%
  4. cDefined as WBC count ≥11 × 109/L