Trial on Subacute Low Back Pain

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

160 participants

Study Classification

INTERVENTIONAL

Study Start Date

1994-01-31

Study Completion Date

2000-12-31

Brief Summary

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A randomized controlled trial over a 10-week period with a two-year follow-up. The objectives were to compare effects of manual therapy in addition to the stay-active concept versus the stay-active concept only in low back pain patients recruited from primary health care. 160 outpatients with acute or subacute low back pain with or without pain radiation into the legs (70 women, 90 men, ages 20-55 years) were recruited from a geographically defined area and randomly allocated to stay-active care with or without muscle stretching, or to manual therapy with or without specific corticosteroid injections in addition to the stay-active concept. Pain, disability rating index, and sickness absence measures were used as outcome at 10-week follow-up and sickness absence was measured at two-year follow-up.

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Detailed Description

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The study is a randomized, controlled, clinical trial in the Swedish province of Gotland, with primary data collection from 1994 to 1998. The recruitment population consisted of the 19000 employed persons born in Sweden, 20-55 years of age. Additional inclusion criteria were:

Acute or subacute perceived low back pain with or without pain radiating to one or both legs, not requiring acute surgical or rheumatological care, low back pain was required to be the dominating symptom, symptom duration of 3 months or less, preceded by at least 2 months of relative freedom from symptoms, consent to treatment and follow-up for 10 weeks, agreement not to consult other therapists during the treatment period, absence of conditions or circumstances that might jeopardize completion of treatment and follow-up, no previous treatment of current complaints with specific mobilization or manipulation, and no previous participation in the present study.

In Sweden, the National Social Insurance Offices (a government agency running the mandatory national social insurance scheme applicable to all Swedish residents) handle sick leave with a duration of two weeks or more. They as well as general practitioners (GP) and other physicians referred patients. The recruiting physician examined all patients, performed a physical examination, and made the final assessment whether they fulfilled the inclusion criteria. Of the 316 patients who were referred to the study, 111 did not meet the inclusion criteria and 45 declined participation. The 160 patients that gave informed consent were entered in the study. After baseline evaluation they were randomized by the study monitor, using sealed pre-prepared envelopes with group assignment derived from a random number table. The envelopes were inaccessible to anyone but the monitor. A design with four treatment groups was used: two experimental and two reference groups with treatment items added successively. The two-group comparison (reference vs experimental treatment) was the primary planned analysis, and pain, disability rating and sickness absence were the main outcome measures. A weighted randomization procedure was used, with 45% of the patients to reference and 55% to the experimental therapies. The Research Ethics Committee at Uppsala University approved the study.

The stay active concept was the basic management strategy in all study groups. Treatment was individual, in groups or both. Treatment modalities were chosen from a group-specific 'toolbox' after clinical assessment of the patients and according to need. Two orthopedic surgeons at Visby Hospital and eight physiotherapists treated the reference patients. In accordance with the study design, muscle stretching was a treatment option in 51% of the reference group, 41% actually received muscle stretching. Two GPs and nine physiotherapists treated the experimental patients. They received the full reference treatment, plus specific mobilization, spinal manipulation, and auto-traction when indicated. Steroid injections were a treatment option in 52% of the experimental group, 36% actually received injections.

The study population was followed over ten weeks with measurements of outcome and progression variables. Outcome measures were self-reported back pain, disability rating, return to work as assessed from sick leave records, quality of life measures, and pain drawings. Moreover, sick leave data during two years of follow up from baseline were obtained.

Conditions

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Subacute Low Back Pain

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

SINGLE

Outcome Assessors

Study Groups

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S-A

Group Type ACTIVE_COMPARATOR

Stay-active care

Intervention Type PROCEDURE

No other treatment than the stay-active care

S-A+stretch

Group Type ACTIVE_COMPARATOR

Stay-active care+stretching

Intervention Type PROCEDURE

Stay-active care and muscle stretching at home and during physiotherapist appointments

S-A+stretch+manther

Group Type EXPERIMENTAL

Stay-active+stretching+manual therapy

Intervention Type PROCEDURE

Manual therapy in addition to stay-active care and stretching given during GP or physiotherapist appointments and matching home exercises

S-A+stretch+manther+sterinject

Group Type EXPERIMENTAL

Stay-active+stretching+manual therapy+steroid injections

Intervention Type PROCEDURE

Manual therapy including steroid injection when indicated in addition to stay-active care and stretching during GP appointments (injections) and during GP or physiotherapist appointments (remaining treatment modalities)

Interventions

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Stay-active care

No other treatment than the stay-active care

Intervention Type PROCEDURE

Stay-active care+stretching

Stay-active care and muscle stretching at home and during physiotherapist appointments

Intervention Type PROCEDURE

Stay-active+stretching+manual therapy

Manual therapy in addition to stay-active care and stretching given during GP or physiotherapist appointments and matching home exercises

Intervention Type PROCEDURE

Stay-active+stretching+manual therapy+steroid injections

Manual therapy including steroid injection when indicated in addition to stay-active care and stretching during GP appointments (injections) and during GP or physiotherapist appointments (remaining treatment modalities)

Intervention Type PROCEDURE

Eligibility Criteria

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Inclusion Criteria

* acute or subacute perceived low back pain with or without pain radiating to one or both legs
* symptom duration of three months or less preceded by at least two months of relative freedom from symptoms
* consent to treatment and follow up for ten weeks
* agreement not to consult therapists other than those participating in the study during the treatment period

Exclusion Criteria

* other conditions or circumstances that might jeopardize completion of treatment and follow up, such as pregnancy, malignant tumors, etcetera
* need for acute surgical or rheumatologic care
* previous treatment of current complaints with specific mobilisation or manipulation
* previous participation in the present study

Minimum Eligible Age

20 Years

Maximum Eligible Age

55 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No