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Table 2 Socio-demographic and clinical characteristics of patients registered with BEN

From: Benign ethnic neutropenia: an analysis of prevalence, timing and identification accuracy in two large inner-city NHS hospitals

Characteristic

SLaM

(n = 89)

BSMHFT

(n = 22)

Total

(n = 111)

Male gender (%)

60 (67)

19 (86)

79 (71)

Age at BEN registration (mean years ± SD)

35 (11)

34 (13)

35 (12)

Duration of illness (mean years ± SD)

16.6 (5.6)

ND

ND

Time to clozapine initiation from illness onset

 (mean years ± SD)

5.1 (4.5)

ND

ND

 (median years, IQR)

4.0 (7.0)

ND

ND

Time to BEN identification from first clozapine initiation

 (mean years ± SD)

3.1 (4.3)

0.7 (1.4)a

2.7 (4.0)

 (median years, IQR)

1.2 (4.0)

0.1 (0.7)a

0.6 (3.3)

Diagnosis (%)

 F20 Paranoid Schizophrenia

72 (82)

22 (100)

94 (84)

 F25 Schizoaffective disorder

12 (13)

0 (0)

12 (11)

 F31 Bipolar disorder

2 (2)

0 (0)

2 (2)

 Other

3 (3)

0 (0)

3 (3)

Psychiatric co-morbidity (%)

5 (6)

0 (0)

5 (5)

Ethnicity (%)

 White

4 (4)

1 (5)

5 (5)

 Black

84 (95)

16 (73)

100 (90)

 Asian

0 (0)

0 (0)

0 (0)

 Other

1 (1)

5 (22)

6 (5)

BEN Identification (%)

 By a haematologist

85 (96)

18 (82)

103 (93)

 Monitored off-licence

4 (4)

4 (18)

8 (7)

Red results prior to BEN identification

 n (%)

28 (31)

6 (27)

34 (31)

 (mean, SD)

1 (2)

1 (1)

1 (2)

 (median, IQR)

0 (1)

0 (1)

0 (1)

Amber results prior to BEN identification

 n (%)

56 (63)

11 (50)

67 (60)

 (mean, SD)

6 (10)

6 (12)

6 (10)

 (median, IQR)

2 (6)

2 (6)

2 (6)

  1. BEN Benign ethnic neutropenia, BSMHFT Birmingham and Solihull Mental Health NHS Foundation Trust, IQR Interquartile range, SD Standard deviation, SLaM South London and Maudsley (NHS Foundation Trust
  2. aMissing data: 2 patients