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Table 3 Difference analytical results of OPLL and Non-OPLL groups

From: Multivariate analysis of factors associated with spinal cord area in single-door cervical laminoplasty with miniplate fixation

 

Total

OPLL

Non-OPLL

P value

The preoperative SCD, cm

1.64 ± 0.15

1.62 ± 0.13

1.65 ± 0.17

0.479

The preoperative C2–7 Cobb angle, °

12.2 ± 8.6

13.9 ± 7.5

11.7 ± 8.9

0.342

The preoperative CCI

0.09 ± 0.10

0.13 ± 0.09

0.08 ± 0.10

0.038

The preoperative spinal canal area, mm2

191 ± 33

186 ± 31

202 ± 38

0.135

The preoperative ROM, °

43.7 ± 11.6

43.2 ± 10.7

44.0 ± 11.8

0.275

The preoperative spinal cord area, mm2

98 ± 46

92 ± 44

97 ± 50

0.695

Door shaft position (wide: narrow)

38:45

9:10

29:35

0.876

Blood loss, ml

236 ± 177

224 ± 189

239 ± 174

0.745

Operative time, min

147 ± 38

144 ± 43

147 ± 37

0.757

Postoperative drainage volume, ml

270.0 ± 130.3

250.0 ± 123.1

273.0 ± 117.0

0.459

  1. OPLL posterior longitudinal ligament, SCD sagittal canal diameter, CCI cervical curvature index, ROM range of motion