Publications by authors named "Katri Pernaa"

Study Design: Systematic review and meta-analysis.

Objective: To investigate evidence on the prevalence and timeline of RTW after lumbar microdiskectomy.

Summary Of Background Data: While lumbar microdiskectomy is a widely used and well-studied procedure, there is lack of evidence on the postoperative prevalence and schedule of return to work after this type of surgery.

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Background And Aims: Previous studies in lumbar spine surgery have mainly studied functioning and pain by comparing average scores from Patient Reported Outcome Measures (PROMs) at different time points. Less is known about these changes in different subgroups. It is self-evident that, while most patients may demonstrate trajectories of these changes close to the average one, some groups may follow more or less different trends.

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The objective was to explore the mediating role of leisure-time physical activity on the correlation between back pain and disability. A mediation analysis was conducted among the cross-sectional sample of 1330 patients in outpatient clinic. The average age was 47.

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Objectives: This study aimed to identify the clusters of patients with different developmental trajectories of pain and disability after anterior cervical decompression and fusion (ACDF).

Methods: Group-based trajectory analysis among 318 patients undergoing the ACDF.

Results: Three developmental trajectories of disability were identified: "Steadily good functioning," "Improved functioning," and "Steadily poor functioning.

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Background: The objective of this study was to explore the internal consistency and factor structure of the Oswestry Disability Index among patients undergoing spinal surgery. The sample consisted of 1,515 patients who underwent lumbar spinal surgery at a university hospital between 2018 and 2021.

Methods: The patients responded to the Oswestry Disability Index within 2 months before surgery.

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Purpose: Our aim was to develop a nationwide, computer-based, Spine Register (FinSpine) for monitoring surgical activity, quality of surgery, long-term outcomes, and effectiveness of treatment. In this paper, we describe our experiences in the development and implementation of the register.

Methods: The register was developed by a steering group, consisting of orthopedic surgeons and neurosurgeons from the whole country.

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Purpose: It is generally expected that lumbar microdiscectomy affects radicular leg pain, but not so much local back pain. The primary objective was to evaluate if the trajectories of changes in pain severity follow similar patterns for back and radicular leg pain after lumbar microdiscectomy. The secondary objective was to investigate the associations between some preoperative parameters and the patterns of these trajectories.

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Purpose: To investigate if the responses to the Neck Disability Index (NDI) may produce some differential item functioning (DIF) comparing men and women.

Materials And Methods: Register-based study among patients undergoing cervical surgery. Item response theory (IRT) analysis including a model for detecting a DIF.

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The objectives are to (a) introduce an approach to use the Neck Disability Index (NDI) in a way, which is different and more International Classification of Functioning, Disability and Health-oriented than acommon practice - focusing on functional profile instead of composite score only, and (b) to describe the changes in functioning experienced by patients undergoing cervical surgery. This was a register-based study of almost 400 patients undergoing different cervical surgical procedures in a university hospital between 2018 and 2021. The patients responded to repeated surveys preoperatively and 3, 12 and 24 months postoperatively.

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The objective was to investigate if age and gender affect the importance of domains of functioning when grading disability related to neck pain. Multi-group confirmatory factor analysis of register-based data on 392 patients undergoing cervical surgery was applied. The main outcome was item loadings on a common factor.

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To explore the internal consistency and factor structure of the Neck Disability Index (NDI) among patients undergoing surgery on the cervical spine. This was an observational retrospective cohort study among 392 patients undergoing cervical surgery of any kind in a university hospital between 2018 and 2021. The patients responded to repeated surveys preoperatively, and 3, 12 and 24 months postoperatively.

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Purpose: Positive spinal sagittal alignment is known to correlate with pain and disability. The association between lumbar spinal stenosis and spinal sagittal alignment is less known, as is the effect of lumbar decompressive surgery on the change in that alignment. The objective was to study the evidence on the effect of lumbar decompressive surgery on sagittal spinopelvic alignment.

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Background and purpose - The role of pelvic incidence in hip disorders is unclear. Therefore, we undertook a literature review to evaluate the evidence on that role. Methods - A search was carried out on MEDLINE, SCOPUS, CENTRAL, and CINAHL databases.

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Study Design: This is a observational study.

Objective: To evaluate the reliability of measuring sagittal spinopelvic alignment after hip arthroplasty.

Summary Of Background Data: Pelvic incidence (PI), sacral slope (SS), pelvic tilt (PT), and lumbar lordosis (LL) are widely used in planning the treatment of people with spinal and hip disorders.

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