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Bone mineral density in postmenopausal Chinese patients with systemic lupus erythematosus

Department of Medicine, Tuen Mun Hospital, Tsing Chung Koon Road, New Territories, Hong Kong, SAR, China, ccmok2005{at}yahoo.com

A Mak

Department of Medicine, Tuen Mun Hospital, Tsing Chung Koon Road, New Territories, Hong Kong, SAR, China

K M Ma

Department of Nuclear Medicine, Tuen Mun Hospital, Tsing Chung Koon Road, New Territories, Hong Kong, SAR, China

The objective was to study the bone mineral density (BMD) and its clinical determinants in a cohort of postmenopausal patients with systemic lupus erythematosus (SLE). All postmenopausal SLE patients receiving long term glucocorticoids were identified from our medical clinics. Lumbar and femoral BMDs were measured by dual X-ray absorptiometry. Clinical determinants of BMD were studied by simple and multiple linear regression. Variables evaluated were: age, body mass index, parity, duration of menopause, smoking and alcohol drinking, duration of SLE and steroid treatment, cumulative prednisone dose, clinical and serological profile, disease activity, damage index and the use of medications. In total, 34 patients were studied. The mean age was 52.9 + 4.9 years and the median duration of SLE was 75.5 months. The mean duration of menopause was 5.2 + 3.9 years and the daily maintenance dose of prednisone was 4.0 + 2.5 mg/day. At the lumbar spine, 33% of the patients were osteopenic and 48% were osteoporotic. Two patients had thoracic and lumbar vertebral compression fractures. At the nondominant femoral neck, 74% of patients were osteopenic but only 3% was osteoporotic. In a multivariate model, the current or past use of hydroxychloroquine (HCQ) was associated with a higher spinal BMD. The presence of anti-Sm and the absence of anti-Ro were associated with a higher femoral BMD. It was concluded that osteoporosis, especially at the spine, is a common and serious problem in postmenopausal Chinese SLE patients receiving long term glucocorticoid therapy. Active intervention should be considered. The protective role of HCQ has to be confirmed with further studies.

Key Words: corticosteroid • glucocorticoid • hydroxychloroquine • morbidity • osteoporosis • risk factor

Lupus, Vol. 14, No. 2, 106-112 (2005)
DOI: 10.1191/0961203305lu2039oa


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