Table 2 Postoperative change of neck pain in overall participants.

From: Neurological improvement is associated with neck pain attenuation after surgery for cervical ossification of the posterior longitudinal ligament

Neck pain (VAS, 0-100 mm)

Pre-op

62.0 ± 21.4 mm

Post-op. 1y

46.2 ± 27.2 mm

 VAS reduction

15.9 ± 26.1 mm

 VAS reduction rate

23.1 ± 46.6%

 50% pain reduction (cases)

77/265 (29.1%)

Post-op. 2y

48.2 ± 28.8 mm

 VAS reduction

13.8 ± 28.4 mm

 VAS reduction rate

18.6 ± 53.4%

 50% pain reduction (cases)

83/265 (31.3%)

  1. Pre-operative visual analogue scale (VAS 1–100 mm) neck pain score was 62.0 ± 21.4 mm on average (± SD), VAS neck pain score was reduced to 46.2 ± 27.2 mm at 1 year after surgery, therefore, post-operative 1 year VAS neck pain score reduction after surgery was 15.9 ± 26.1 mm and VAS neck pain score reduction was 23.1 ± 46.6%. VAS neck pain score 2 years after surgery was 48.2 ± 28.8 mm, post-operative 2 years VAS neck pain score reduction was 13.8 ± 28.4 mm and VAS neck pain score reduction was 18.6 ± 53.4%. Significant attenuation of neck pain, which was set to 50% reduction of VAS neck pain, was achieved in 77 out of 265 patients 1 year after surgery (29.1%) and 83 out of 265 patients 2 year after surgery (31.3%).
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