Skip to main content

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