Risk factors for osteoporosis in chronic inflammatory demyelinating polyradiculoneuropathy.

INTRODUCTION

Chronic inflammatory demyelinating polyradiculoneuropathy (CIDP) patients possess multiple risk factors for osteoporosis, but few studies have evaluated bone mineral density (BMD) in CIDP patients.

METHODS

We retrospectively compared the BMD of CIDP patients with that of normal controls, and evaluated the clinical factors associated with osteoporosis.

RESULTS

Total BMD was lower in CIDP patients than in normal controls (P = 0.017). In a comparison of 16 osteoporotic CIDP patients with 25 non-osteoporotic patients, the cumulative prednisolone dose was lower (P = 0.022) and the duration from disease onset to BMD measurement was shorter (P = 0.014) in osteoporotic patients than in non-osteoporotic patients. Function, as measured by modified Rankin scale score within 3 years of the BMD measurement, was worse in osteoporotic than in non-osteoporotic patients (P = 0.008).

DISCUSSION: BMD in CIDP patients was significantly lower than in normal controls. Functional status rather than cumulative steroid dose was associated with osteoporosis. Muscle Nerve 58: 407-412, 2018.