Quantifying dimensions of physical behavior in chronic pain conditions.
Anisoara Paraschiv-Ionescu, Christophe Perruchoud, Blaise Rutschmann and 2 others
PMID 27663524WHAT IT FOUND
Wearable sensors showed that pain intensity relates to overall physical behavior, not just activity amount.
Patients with moderate to severe pain moved less and had lower movement complexity. A global composite score captured this link, though individual metrics did not.
Key findings
01A global composite score combining mobility and complexity showed a significant negative association with pain intensity, explaining 25% of the variance.
02Individual metrics like activity percentage or walking time did not show a significant linear relationship with pain intensity, despite differing between pain groups.
03Patients with complex regional pain syndrome showed lower movement complexity than other pain groups with similar pain intensity, suggesting diagnostic differences in behavior.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for OTs
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What it does not show
The study was retrospective and used a heterogeneous sample with different pain etiologies and demographics. Sample size was modest, which may have led to underpowered analysis for some comparisons. Pain intensity accounted for only 25% of the variance in physical behavior, meaning other unmeasured factors strongly influence movement. The comparison between diagnostic subgroups involved very small numbers, particularly for complex regional pain syndrome (n=7).
Declared interests
The paper does not report funding sources or conflicts of interest in the provided text.
The easy way to misread this
Do not assume that a simple step count or total activity time reflects pain severity. This study found that individual activity metrics did not correlate with pain intensity. Only a complex composite score combining mobility and movement patterns showed a significant relationship.