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LetterResearch Letter

Isolated Neutropenia in Systemic Lupus Erythematosus

Nouf A. Alhammadi, Dafna D. Gladman, Jiandong Su and Murray B. Urowitz
The Journal of Rheumatology March 2023, 50 (3) 459-460; DOI: https://doi.org/10.3899/jrheum.220373
Nouf A. Alhammadi
1University of Toronto Lupus Clinic, Schroeder Arthritis Institute, Krembil Research Institute, Toronto Western Hospital, Toronto, Ontario Canada;
2King Khalid University, Abha, Saudi Arabia.
MBBS
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Dafna D. Gladman
1University of Toronto Lupus Clinic, Schroeder Arthritis Institute, Krembil Research Institute, Toronto Western Hospital, Toronto, Ontario Canada;
MD, FRCPC
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  • ORCID record for Dafna D. Gladman
Jiandong Su
1University of Toronto Lupus Clinic, Schroeder Arthritis Institute, Krembil Research Institute, Toronto Western Hospital, Toronto, Ontario Canada;
BSc
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Murray B. Urowitz
1University of Toronto Lupus Clinic, Schroeder Arthritis Institute, Krembil Research Institute, Toronto Western Hospital, Toronto, Ontario Canada;
MD, FRCPC
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  • For correspondence: m.urowitz@utoronto.ca
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Article Figures & Data

Tables

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    Table 1.

    Characteristics of patients with neutropenia.

    Isolated
    Neutropenia
    Neutropenia/
    Lymphopenia
    P
    Patients, n35135
    Neutropenia severity
        Severe6 (17.1)24 (17.8)0.93
        Mild/moderate29 (82.9)111 (82.2)
    Age at index date, yrs, mean (SD)38.5 (12.1)38.7 (12.7)0.91
    Disease duration, yrs, mean (SD)8.8 (8.6)10.4 (8.9)0.33
    Female sex32 (91.4)121 (89.6)0.75
    Black race19 (54.3)45 (33.3)0.02*
    SLEDAI-2K score, mean (SD)4.0 (3.8)5.2 (4.5)0.17
    Low C or anti-dsDNA23 (65.7)91 (67.4)0.85
    Azathioprine3 (8.6)37 (27.4)0.02*
    Cyclophosphamide0 (0)0 (0)–
    Methotrexate0 (0)7 (5.2)0.17
    MMF7 (20)21 (15.6)0.53
    Bacterial infection1 (2.9)5 (3.7)0.81
    Viral infection2 (5.7)6 (4.4)0.75
    • Values are presented as n (%) unless indicated otherwise.

    • ↵* P < 0.05. C: complement; MMF: mycophenolate mofetil; SLEDAI-2K: Systemic Lupus Erythematosus Disease Activity Index 2000.

    • View popup
    Table 2.

    Infection rate within 1 year in patients with no neutropenia, isolated neutropenia, and combined neutropenia/lymphopenia.

    No Neutropenia,
    n = 1385
    Isolated Neutropenia,
    n = 31
    Neutropenia/Lymphopenia,
    n = 128
    Infection rate, n (%)243 (17.6)2 (6.5)*28 (21.9)
    • Cohort sizes are smaller than in Table 1 because some patients had no further visits.

    • ↵* P < 0.05 comparing infection rate with lymphopenia/neutropenia group; no other pairwise difference was found.

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1 Mar 2023
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Isolated Neutropenia in Systemic Lupus Erythematosus
Nouf A. Alhammadi, Dafna D. Gladman, Jiandong Su, Murray B. Urowitz
The Journal of Rheumatology Mar 2023, 50 (3) 459-460; DOI: 10.3899/jrheum.220373

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Isolated Neutropenia in Systemic Lupus Erythematosus
Nouf A. Alhammadi, Dafna D. Gladman, Jiandong Su, Murray B. Urowitz
The Journal of Rheumatology Mar 2023, 50 (3) 459-460; DOI: 10.3899/jrheum.220373
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