Time Course and Risk Profile of Work-Related Neck Disability: A Longitudinal Latent Class Growth Analysis.
Yanfei Xie, Brooke K Coombes, Lucy Thomas and 1 others
PMID 35485191WHAT IT FOUND
Most sonographers with neck pain improved slowly, but a third had fluctuating disability linked to low physical activity, poor psychosocial support, and central sensitization.
Screen for these risks early to target interventions rather than adopting a wait-and-see approach for everyone.
Key findings
01Two distinct trajectories of neck disability emerged over 12 months: 64.8% followed a low-resolving pattern, while 35.2% followed a moderate-fluctuating pattern.
02Participants in the moderate-fluctuating trajectory had significantly lower vigorous physical activity, lower workplace social support, and lower job satisfaction at baseline compared to those who improved.
03The moderate-fluctuating group showed signs of central sensitization, including widespread hyperalgesia and heightened pain facilitation, along with higher rates of depression and anxiety.
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 sample size was modest (91 participants), and univariate rather than multivariable analysis was used due to the small number in the unfavorable trajectory class, meaning confounding factors were not controlled. Neck disability was assessed only at three time points (baseline, 6, and 12 months), which may lack the precision needed to fully capture fluctuating patterns. The study included both symptomatic and asymptomatic sonographers, which may have confounded results. The 'healthy worker' effect may have biased results, as those with worsening pain might have left the profession before inclusion.
Declared interests
The study was approved by The University of Queensland Human Research Ethics Committee. No specific funding sources or conflicts of interest declarations were provided in the supplied text.
The easy way to misread this
Do not assume that the identified risk factors (such as low physical activity or psychosocial distress) are causal or that intervening on them will definitely change the trajectory. The study used univariate analysis without controlling for confounders, so these associations may not be independent predictors.