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Table 1 Demographic data, clinical features, and complications of KP between the RA and control groups

From: Radiological and clinical outcomes of balloon kyphoplasty for osteoporotic vertebral compression fracture in patients with rheumatoid arthritis

Variable RA group Control group P value
Patients/vertebrae 98/ 158 114/150  
Age (year) 71.31 ± 5.49 73.18 ± 4.27 0.269
Gender (male to female) 8:90 15:99 0.244
Tobacco use 13:85 22:92 0.238
BMI (kg/m2) 23.2 ± 3.6 23.8 ± 3.1 0.337
BMD (g/cm2) 0.54 ± 0.12 0.55 ± 0.10 0.361
Glucocorticoid users 65 0 < 0.01
Time to surgery (days) 20.95 ± 18.3 16.63 ± 14.1 0.266
Cement volume (mL) 6.20 ± 1.54 6.81 ± 2.05 0.073
ESR (mm/h) 35.82 ± 24.2 20.16 ± 13.9 < 0.01
CRP (mg/dL) 10.76 ± 11.3 8.97 ± 12.5 0.512
Complications (vertebrae)
 Total cement leakage 43 (27.2%) 29 (19.3%) 0.102
 Paravertebral cement leakage 18 (11.4%) 14 (9.3%) 0.554
 Intradiscal cement leakage 20 (12.7%) 12 (8.0%) 0.181
 Intraspinal cement leakage 5 (3.16%) 3 (2.0%) 0.521
 Refracture 3 (1.9%) 2 (1.3%) 0.695
 Adjacent vertebral fracture 18 (11.4%) 5 (3.3%) < 0.01
  1. Values are given as mean ± SD. RA indicates rheumatoid arthritis, BMI indicates body mass index, BMD indicates bone mineral density, ESR indicates erythrocyte sedimentation rate, CRP indicates c-reactive protein. Refracture indicates the operated vertebral body refractured again after KP