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Connelly K, Kandane-Rathnayake R, Hoi A, Louthrenoo W, Hamijoyo L, Cho J, Lateef A, Fen Luo S, Wu YJJ, Li Z, Navarra S, Zamora L, Sockalingam S, Hao Y, Zhang Z, Katsumata Y, Harigai M, Oon S, Chan M, Chen YH, Bae SC, O'Neill S, Goldblatt F, Kikuchi J, Takeuchi T, Ling Ng KP, Tugnet N, Basnayake BMDB, Ohkubo N, Tanaka Y, Sing Lau C, Nikpour M, Golder V, Morand EF. Associations of improvement in laboratory tests with clinical outcomes in patients with active systemic lupus erythematosus: a multinational longitudinal cohort study. THE LANCET. RHEUMATOLOGY 2022; 4:e831-e841. [PMID: 38261391 DOI: 10.1016/s2665-9913(22)00307-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 10/05/2022] [Accepted: 10/06/2022] [Indexed: 11/09/2022]
Abstract
BACKGROUND The selection and categorisation of laboratory tests in disease activity measures used within systemic lupus erythematosus (SLE) trial endpoints lack strong evidence. We aimed to determine whether longitudinal improvements in routinely measured laboratory tests are associated with measures of clinical improvement in patients with baseline active SLE. METHODS We included patients from a multicentre longitudinal cohort (recruited between May 1, 2013, and Dec 31, 2019) with active SLE (SLEDAI-2K ≥6) coinciding with an abnormality in at least one of 13 routine laboratory tests, at a visit designated as baseline. At 12 months, we analysed associations between thresholds of improvement in individual laboratory test results, measured as continuous variables, and five clinical outcomes using logistic regression. Primary outcomes were damage accrual and lupus low disease activity state (LLDAS), and secondary outcomes were modified SLE responder index (mSRI), physician global assessment (PGA) improvement of at least 0·3, and flare. FINDINGS We included 1525 patients (1415 [93%] women and 110 [7%] men, 1328 [87%] Asian ethnicity) in separate subsets for each laboratory test. The strongest associations with LLDAS and damage protection were seen with improvements in proteinuria (complete response: adjusted odds ratio [OR] 62·48, 95% CI 18·79-208·31 for LLDAS, OR 0·22, 95% CI 0·10-0·49 for damage accrual), albumin (complete response: adjusted OR 6·46, 95% CI 2·20-18·98 for LLDAS, OR 0·42, 95% CI 0·20-1·22 for damage accrual), haemoglobin (complete response: adjusted OR 1·97, 95% CI 1·09-3·53 for LLDAS, OR 0·33, 95% CI 0·15-0·71 for damage accrual), erythrocyte sedimentation rate (complete response: adjusted OR 1·71, 95% CI 1·10-2·67 for LLDAS, OR 0·53, 95% CI 0·30-0·94 for damage accrual), and platelets (complete response: adjusted OR 4·82, 95% CI 1·54-15·07 for LLDAS, OR 0·49, 95% CI 0·20-1·19 for damage accrual). Improvement in serological tests were mainly associated with PGA and mSRI. White cell and lymphocyte count improvements were least predictive. INTERPRETATION Improvements in several routine laboratory tests correspond with clinical outcomes in SLE over 12 months. Tests with the strongest associations were discrepant with laboratory tests included in current trial endpoints, and associations were observed across a range of improvement thresholds including incomplete resolution. These findings suggest the need to revise the use of laboratory test results in SLE trial endpoints. FUNDING Abbvie.
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Affiliation(s)
- Kathryn Connelly
- School of Clinical Sciences at Monash Health, Monash University, Clayton, VIC, Australia.
| | | | - Alberta Hoi
- School of Clinical Sciences at Monash Health, Monash University, Clayton, VIC, Australia
| | - Worawit Louthrenoo
- Division of Rheumatology, Department of Internal Medicine, Chiang Mai University Hospital, Chiang Mai, Thailand
| | - Laniyati Hamijoyo
- Division of Rheumatology, Department of Internal Medicine, Padjadjaran University, Bandung, Indonesia
| | - Jiacai Cho
- Rheumatology Division, University Medical Cluster, National University Hospital, Singapore
| | - Aisha Lateef
- Rheumatology Division, University Medical Cluster, National University Hospital, Singapore
| | - Shue Fen Luo
- Department of Rheumatology, Allergy and Immunology, Chang Gung Memorial Hospital, Taoyuan City, Taiwan
| | - Yeong-Jian J Wu
- Department of Rheumatology, Allergy and Immunology, Chang Gung Memorial Hospital, Taoyuan City, Taiwan
| | - Zhanguo Li
- Department of Rheumatology and Immunology, People's Hospital Peking University Health Science Center, Beijing, China
| | - Sandra Navarra
- Bone and Joint Center, University of Santo Tomas Hospital, Manila, Philippines
| | - Leonid Zamora
- Bone and Joint Center, University of Santo Tomas Hospital, Manila, Philippines
| | | | - Yanjie Hao
- Department of Rheumatology and Immunology, Peking University First Hospital, Beijing, China
| | - Zhuoli Zhang
- Department of Rheumatology and Immunology, Peking University First Hospital, Beijing, China
| | - Yasuhiro Katsumata
- Institute of Rheumatology, Tokyo Women's Medical University, Tokyo, Japan
| | - Masayoshi Harigai
- Institute of Rheumatology, Tokyo Women's Medical University, Tokyo, Japan
| | - Shereen Oon
- Department of Rheumatology, St Vincent's Hospital, Melbourne, VIC, Australia
| | - Madelynn Chan
- Department of Rheumatology, Allergy and Immunology, Tan Tock Seng Hospital, Singapore
| | - Yi-Hsing Chen
- Division of Allergy, Immunology and Rheumatology, Taichung Veterans General Hospital, Taichung City, Taiwan
| | - Sang-Cheol Bae
- Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, Seoul, South Korea
| | - Sean O'Neill
- Rheumatology Department, Liverpool Hospital, Liverpool, NSW, Australia
| | - Fiona Goldblatt
- Department of Rheumatology, Flinders Medical Centre and Royal Adelaide Hospital, Bedford Park, SA, Australia
| | - Jun Kikuchi
- Division of Rheumatology, Department of Internal Medicine, Keio University, Tokyo, Japan
| | - Tsutomu Takeuchi
- Division of Rheumatology, Department of Internal Medicine, Keio University, Tokyo, Japan
| | | | - Nicola Tugnet
- Department of Rheumatology, Greenlane Clinical Centre, Auckland, New Zealand
| | | | - Naoaki Ohkubo
- The First Department of Internal Medicine, University of Occupational and Environmental Health, Fukuoka, Japan
| | - Yoshiya Tanaka
- The First Department of Internal Medicine, University of Occupational and Environmental Health, Fukuoka, Japan
| | - Chak Sing Lau
- Division of Rheumatology and Clinical Immunology, Department of Medicine, University of Hong Kong, Hong Kong Special Administrative Region, China
| | - Mandana Nikpour
- Department of Rheumatology, St Vincent's Hospital, Melbourne, VIC, Australia
| | - Vera Golder
- School of Clinical Sciences at Monash Health, Monash University, Clayton, VIC, Australia
| | - Eric F Morand
- School of Clinical Sciences at Monash Health, Monash University, Clayton, VIC, Australia
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