(Golden Oldie) Increasing recreational physical activity in patients with chronic low back pain

Key points

1. 01ETMI group showed a 2.7-point greater reduction on the Roland-Morris Disability Questionnaire at 12 months (95% CI: 0.9, 4.5; P = .004), exceeding the minimal clinically important difference of 2.5 points
2. 0284% of ETMI patients achieved greater than 30% disability reduction vs 64.2% of controls (P = .002)
3. 03ETMI required fewer sessions on average (3.5 vs 5.1), suggesting greater efficiency
4. 04Physical activity levels were significantly higher in the ETMI group at both 3 and 12 months
5. 05The intervention targets self-efficacy and fear of movement, two key obstacles to activity in chronic low back pain

How it was conducted

Design

Prospective, pragmatic, nonrandomized controlled clinical trial; multicenter

Participants

220 adults aged 25-55 with chronic low back pain (greater than 3 months) referred to physical therapy clinics in Israel

Intervention

Enhanced transtheoretical model intervention (ETMI): behavior-change counseling matched to readiness stage, reassurance, graded exposure, and patient-chosen recreational aerobic activity; delivered by trained physical therapists

Control

Usual physical therapy (mobilization, manipulation, exercise, postural training, electrotherapy, etc.)

Primary outcome

Back pain-related disability at 12 months via Roland-Morris Disability Questionnaire (RMDQ; 0-23 scale)

Follow-up

3 months and 12 months; intention-to-treat analysis in 189 patients (85.9%)

What they found

• RMDQ mean difference at 12 months: 2.7 points (95% CI: 0.9, 4.5; P = .004) favoring ETMI
• 84.0% of ETMI patients achieved greater than 30% reduction in disability vs 64.2% of controls (P = .002)
• Worst pain at 12 months: mean difference 1.2 (95% CI: 0.05, 2.3; P = .04) favoring ETMI
• Average pain at 12 months: mean difference 0.9 (95% CI: -0.03, 1.8; P = .06), not statistically significant
• Baecke Physical Activity Questionnaire sport index at 12 months: mean difference 0.7 (95% CI: 0.07, 1.3; P = .02) favoring ETMI
• SF-12 physical component at 12 months: mean difference 3.5 (95% CI: -0.01, 7.0; P = .05) favoring ETMI
• SF-12 mental component at 12 months: mean difference 1.3 (95% CI: -1.3, 3.9; P = .3), not significant
• At 12 months, 58% of ETMI group were physically active vs 44% of controls (P < .04)
• Between-group effect size at 12 months: d = 0.54
• Average sessions: 3.5 (ETMI) vs 5.1 (control)
• RMDQ at 3 months: mean difference 1.3 (95% CI: -0.3, 3.0; P = .1), not significant

Limitations

• Non-randomized allocation - physical therapists and patients were not randomly assigned, introducing potential selection bias
• Self-reported physical activity (no accelerometers or objective measures of adherence)
• Treatment fidelity was only partially checked; messages delivered by therapists were not recorded or formally analyzed
• Restricted to adults aged 25-55 and a single geographic district in Israel, limiting generalizability to older patients and other populations

Why it matters

For patients

Patients with chronic low back pain may achieve greater reductions in pain and disability by working with a physical therapist trained in behavior-change techniques, particularly if fear of movement or low motivation is a barrier.

For clinicians

Physical therapists can be trained in brief behavior-change counseling (transtheoretical model, motivational interviewing, graded exposure) and achieve better disability outcomes with fewer sessions than conventional care, though replication in randomized trials is needed.

For readers

This study provides early evidence that integrating structured behavior-change theory into physical therapy for chronic low back pain is feasible and may outperform usual care, but the non-randomized design warrants cautious interpretation.