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Table 1 Comparison of demographic characteristics

From: Can paraspinal muscle degeneration be a reason for refractures after percutaneous kyphoplasty? A magnetic resonance imaging observation

  Groups χ2/Z/t P
Refractured (n = 33) No-refractured (n = 59)
Gender (n)    0.012 0.912
 Males 11 (33.3) 19 (32.2)   
 Females 22 (66.7) 40 (67.8)   
Age (years) 74.27 ± 8.10 75.29 ± 8.51 0.558 0.578
BMI (kg/m2) 22.65 ± 2.11 22.55 ± 2.14 − 0.318 0.751
Preoperative BMD (T) − 3.83 ± 0.63 − 3.65 ± 0.66 1.245 0.216
Follow-up duration (days) 215.12 ± 79.47 265.24 ± 91.90 /
  1. Categorical data was described as n (%); quantitative data were described as mean ± SD