Spinal stenosis in older adults: reducing controlled pain drugs helped explain fewer falls

Design

Secondary and mediation analysis of a randomised controlled trial

Population

435 older adults with neurogenic claudication (BOOST trial)

Primary outcome

Controlled pain medicine use and its role in falls reduction

Effect

Controlled drug use at 6 months OR 0.62 (95% CI 0.40 to 0.96) vs best-practice advice

The UK BOOST trial had already shown that a group physical and psychological programme improved walking and reduced falls at 12 months in older adults with neurogenic claudication from lumbar spinal stenosis. A secondary analysis of its 435 participants asked how.

At baseline, 63% took pain medication and 34% took at least one controlled drug, a category that in the UK includes opioids and gabapentinoids. At six months, those in the programme were less likely than those given best-practice advice to be taking a controlled pain drug, though the difference narrowed by 12 months. Pain improved modestly. Mediation analysis found that the early reduction in controlled analgesics was one of the factors behind the fall reduction.

The practical lesson is that controlled pain medicines are common in this condition and add to falls risk, and that an active exercise-and-coping programme can make tapering them easier. In India, where structured group programmes are scarce, the principle still applies: pair any reduction in opioids or gabapentinoids with active rehabilitation rather than simply stopping.

• Review opioid and gabapentinoid use in every older adult with neurogenic claudication, especially those who have fallen.
• Offer active rehabilitation combining exercise and coping skills as an alternative route to pain control.
• Plan gradual tapering of controlled analgesics alongside rehabilitation, not in isolation.
• Recheck medication use at six and twelve months; the early reduction narrowed over time.
• Ask about falls at each review of patients on these medicines.

Why it matters

A third of these patients were on controlled analgesics, a modifiable falls risk often left unreviewed.

Don't overread it

This is a secondary mediation analysis; it suggests, rather than proves, that drug reduction caused the fall reduction.

The statistics, in plain English

An odds ratio of 0.62 (95% CI 0.40 to 0.96) means programme participants had about 38% lower odds of using a controlled pain drug at six months. The upper bound near 1.0 shows the effect could be small.

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