Effect of a Case Manager to Assist the Rehabilitation for Lumbar Spinal Fusion Patients. A Randomised Controlled Trial.

NCT ID: NCT03433443

Last Updated: 2018-02-14

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: NA
• Total Enrollment: 82 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2010-04-01
• Study Completion Date: 2014-11-05

Brief Summary

The aim of the current study is to examine the effect of a case manager-assisting rehabilitation program compared to usual physical rehabilitation for patients undergoing a lumbar spinal fusion on functional disability, pain, and return to work. Furthermore, to explore if the case manager-assisted rehabilitation program is cost-effective in a societal perspective compared to usual rehabilitation.

Participants: 82 patients undergoing a lumbar spinal fusion due to disc degeneration or spondylolisthesis. Participants are adults of both gender.

Patients are included from Aarhus University Hospital, Denmark, and Region Hospital of Silkeborg, Denmark. Participants will be block randomised at each centre. The participants were randomized 1:1 to case manager-assisted rehabilitation (intervention group) or usual physical rehabilitation (control group). Both groups received usual physical rehabilitation. The patients in the intervention group meet pre-operatively with a case manager in order to set a plan for their return to daily activities and work. The intervention also included post-surgical meetings, phone meetings, work place visits, or voluntary roundtable meetings.

Detailed Description

The past decades have seen an increase in the numbers of patients undergoing lumbar spinal surgery due to degenerative diseases in the lumbar spine. The return to work rates following a lumbar spinal fusion have been reported to be between 35 and 50 percentages one year after the surgery and between 50-63% at 2-3-year after the surgery.

The aim of the current study is to examine the effect of a case manager-assisting rehabilitation program compared to usual physical rehabilitation for patients undergoing a lumbar spinal fusion on functional disability, pain, and return to work. Furthermore, to explore if the case manager-assisted rehabilitation program is cost-effective in a societal perspective compared to usual rehabilitation.

A total of 82 patients were included from Aarhus University Hospital, Denmark, and Region Hospital of Silkeborg, Denmark. Participants were block randomised at each centre. The participants were randomized 1:1 to case manager-assisted rehabilitation (intervention group) or usual physical rehabilitation (control group), by use of sealed envelopes. Both groups received usual physical rehabilitation. The patients in the intervention group meet pre-operatively with a case manager in order to set a plan for their return to daily activities and work. The intervention also included post-surgical meetings, phone meetings, work place visits, or voluntary roundtable meetings.

Statistical analysis:

For the power calculation, the Oswestry Disability Index was used. Based on another study in process at the time of the planning of the study, and in accordance to other research the standard deviation was set to 17 points. With a minimal clinical important difference of 12 points, a power of 80%, and a two sided significance level of 0.05, a total of 66 patients (33 in each group) should be included. I order to account for a 20% lost to follow-up a total om 80 patient should be included.

Data will be entered twice into EpiData and any divergence will be corrected according to the original material. STATA 14.1 will be used for statistical evaluation. The risk of a type 1 error was set to 5%. The data will be analyzed according to the intention-to-treat principle.

I order to compare the two groups a mixed model for repeated measurements with an unstructured covariance matrix will be used to test the effect on Oswestry Disability Index, back pain, and leg pain.

I order to evaluate the patients' return to work following the surgery, the cumulative incidence proportion of time to first spell of 4 weeks of return to work within a 2-year period will be calculated and compared by the log rank test. The relative cumulative incidens of a spell of 4 weeks' return to work will be analysed in a generalized linear regression model using the pseudo values method adjusted for time until old age pension and disability pension.

The primary outcome used in the economic evaluation are functional disability as measured by the Oswestry Disability Index. Furthermore, health-related quality of life was measured by the EuroQol 5-dimensions (EQ-5D) and valued by Danish preference weights in order to calculate Quality Adjusted Life Years (QALY).

The resource use, costs, and outcomes will be analysed as arithmetic means with 95% bootstrapped confidence intervals based on non-parametric bootstrapping (10,000 replicates), and after discounting at an annual rate of 3%. To assess the cost-effectiveness, costs and outcomes will be transformed into a uni-dimensional measure of incremental net benefit for a range of hypothetical values of willingness to pay per unit of effect: incremental net benefit = (EA - EB) * willingness to pay per effect unit - (CA - CB), where C denotes costs and E denotes effects with A and B referring to comparators.

The study protocol was approved by the Danish Data Protection Agency (J.nr.2010-41-444), and the local Ethical Committee (J.nr.M-20100038)

Conditions

Rehabilitation; Spinal Fusion; Case Managers

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: TREATMENT
• Blinding Strategy: NONE

Study Groups

Control group

Usual physical rehabilitation group

Group Type: ACTIVE_COMPARATOR

Usual physical rehabilitation

Intervention Type: BEHAVIORAL

The patients received usual physical rehabilitation at their community rehabilitation unit, and had no case manager assigned.

Intervention group

Case manager assisted rehabilitation

Group Type: EXPERIMENTAL

Case manager assisted rehabilitation

Intervention Type: BEHAVIORAL

In addition to receiving usual physical rehabilitation the patients in the intervention group had a case manager assigned. A team of three case managers delivered the intervention: a medical doctor specialized in social medicine, an occupational therapist, and a social worker. The case managers were all experienced case managers for non-surgical low back pain patients. The allocation to the case manager was random, and all patients had a main case manager assigned. The case managers involved the other case managers if their special knowledge were needed. Barriers for the patient's rehabilitation were discussed with the multidisciplinary team also including a surgeon, a physiotherapist, and a nurse.

Usual physical rehabilitation

Intervention Type: BEHAVIORAL

The patients received usual physical rehabilitation at their community rehabilitation unit, and had no case manager assigned.

Interventions

Case manager assisted rehabilitation

In addition to receiving usual physical rehabilitation the patients in the intervention group had a case manager assigned. A team of three case managers delivered the intervention: a medical doctor specialized in social medicine, an occupational therapist, and a social worker. The case managers were all experienced case managers for non-surgical low back pain patients. The allocation to the case manager was random, and all patients had a main case manager assigned. The case managers involved the other case managers if their special knowledge were needed. Barriers for the patient's rehabilitation were discussed with the multidisciplinary team also including a surgeon, a physiotherapist, and a nurse.

Intervention Type: BEHAVIORAL

Usual physical rehabilitation

The patients received usual physical rehabilitation at their community rehabilitation unit, and had no case manager assigned.

Intervention Type: BEHAVIORAL

Eligibility Criteria

Inclusion Criteria

• All patients were scheduled for an lumbar spinal fusion due to degenerative disc disease or spondylolisthesis grade I or II.

Exclusion Criteria

• age below 18 years or above 63 years, inability to speak and understand Danish, a driving distance of more than 100 kilometers to the hospital, un-instrumented lumbar spinal fusion, disability pension, early retirement, being out of the working force for more than 24 months, and patients under education on State education grant.

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 63 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

University of Aarhus

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Lisa G Østergaard

Role: PRINCIPAL_INVESTIGATOR

Aarhus University Hospital, Department of Physiotherapy and Occupational Therapy

Other Identifiers

UAarhus_CM_rehab

Identifier Type: -

Identifier Source: org_study_id