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Table 4 Stratified analysis of K-line for association between technical effectiveness and type of laminoplasty

From: Are clinical outcomes affected by laminoplasty method and K-line in patients with cervical ossification of posterior longitudinal ligament? A multicenter study

Variables*

k-line (+)

K-line (−)

OR

95% CI

P value

OR

95% CI

P value

Post-operative JOA score

0.559

0.183–1.712

0.309

0.110

0.009–1.351

0.084

Operative time

0.770

0.265–2.238

0.631

0.875

0.059–12.962

0.922

Blood loss

0.244

0.100–0.597

0.002

0.659

0.112–3.878

0.644

JOA score’s RR

1.642

0.608–4.437

0.328

2.829

0.176–45.549

0.463

  1. Stratification factors: K-line (+) and (−). Independent variables: type of laminoplasty (groups: mFDL and ODL). The adjusted covariates for the JOA score and its RR were age, sex, BMI, preoperative JOA score, follow-up duration, and OPLL type. The adjusted covariates for operative time and blood loss were age, sex, BMI, preoperative JOA score, and OPLL type
  2. OR odds ratio, CI confidence interval, JOA Japanese Orthopaedic Association, RR recovery rate
  3. *Grouped by the variables below. Outcome variables: grouped by postoperative JOA score (bounded by ≥ 14), grouped by operative time (bounded by ≥ 90 min), grouped by blood loss (bounded by ≥ 300 mL), grouped by JOA score recovery rate (bounded by ≥ 0.82)
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Journal of Orthopaedic Surgery and Research

ISSN: 1749-799X