From: Exploring the definition of «acute» neck pain: a prospective cohort observational study comparing the outcomes of chiropractic patients with 0–2 weeks, 2–4 weeks and 4–12 weeks of symptoms
High-acute
vs. Mid-acute
Mid-acute
vs. Subacute
High-Acute
Pre NRS Neck
0.322
0.124
0.0001*
Age (years)
0.043*
0.002*
General Health
0.115
0.935
0.003*
Smoker (yes)
0.971
0.046*
0.009*