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Table 2 Clinical outcomes from patients with severe haemophilia B on FIX prophylaxis in CHESS II (past 12 months)

From: Clinical, humanistic, and economic burden of severe haemophilia B in adults receiving factor IX prophylaxis: findings from the CHESS II real-world burden of illness study in Europe

Clinical outcomes

SHL patients

(n = 42)

EHL patients

(n = 33)

All patients

(n = 75)

ABR, mean (SD)

2.4 (1.67)

2.5 (2.62)

2.4 (2.14)

Number of bleeds per year, n (%)

   

 None

6 (15)

5 (15)

11 (15)

 1

6 (15)

5 (15)

11 (15)

 ≥ 2

28 (70)

23 (70)

51 (70)

History of joint surgery, n (%)

10 (24)

11 (33)

21 (28)

Bleed-related hospitalisations, mean (SD)#

0.76 (0.95)

0.55 (1.30)

0.67 (1.10)

Bleed-related hospital days per patient, mean (SD)

1.2 (2.9)

1.9 (5.2)

1.5 (4.1)

Target joints, mean (SD)

0.3 (0.71)

0.4 (0.79)

0.4 (0.74)

Number of target joints, n (%)

35 (83)

23 (70)

58 (77)

None

3 (7)

8 (24)

11 (15)

 1

4 (10)

2 (6)

6 (8)

 ≥ 2

   

Problem joints, mean (SD)

0.6 (0.94)

0.9 (1.32)

0.7 (1.12)

Number of problem joints, n (%)

   

None

26 (62)

19 (58)

45 (60)

 1

8 (19)

6 (18)

14 (19)

 ≥ 2

8 (19)

8 (24)

16 (21)

  1. EHL, extended half-life; SD, standard deviation; SHL, short half-life
  2. ABR data were incomplete/missing for 2 patients
  3. Types of surgery included arthrocentesis, arthrodesis, arthroplasty, arthroscopy, or synovectomy
  4. #Bleed-related hospitalisation data were incomplete or missing for 13 patients