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Table 1 Patient characteristics

From: Bridging the cervicothoracic junction during posterior cervical laminectomy and fusion for the treatment of multilevel cervical ossification of the posterior longitudinal ligament: a retrospective case series

Characteristics Value
Number of patients 46
Age (years) 55.4 ± 7.4
Gender
 Male 38
 Female 8
 Symptomatic duration (months) 34.9 ± 12.3
 High-intensity signal on T2WI-MRI 12
Type of OPLL
 Local 0
 Segmental 5
 Continuous 27
 Mixed 14
Occupying ratio of OPLL
  < 60% 36
  ≥ 60% 10
K-line
 ( +) 31
 (-) 15
 Follow-up (month) 20.7 ± 8.3
 Operation time (minute) 205.2 ± 39.8
 Blood loss (ml) 352.2 ± 143.7
  1. OPLL Ossification of the posterior longitudinal ligament