Neck pain disability is related to the frequency of migraine attacks: a cross-sectional study.

Background: Migraine and neck pain can be critical causes of disability. The contribution of neck pain for the overall disability of individuals with migraine remains unknown.
Objective: To contrast the disability experienced by individuals with episodic and chronic migraine with and without neck pain as captured by the Neck Disability Index.
Methods: Disability due to neck pain was assessed using the Neck Disability Index in individuals with episodic or chronic migraine seen at a university-based headache center. Neck disability was defined as mild (score ranging from 5 to 14 points), moderate (15-24 points), severe (25-34 points) or complete (35 points or higher). To compare differences between groups, a chi-square test was applied. Log-binomial logistic regression was used to estimate disability as a function of headache status after adjustments for age, time since migraine onset, and headache intensity.
Results: Sample consisted of 169 individuals, 104 with episodic migraine and 65 with chronic migraine. Any disability due to neck pain happened in 69% of those with episodic migraine, relative to 92% in chronic migraine (P < .001). Individuals with chronic migraine were at a significantly increased risk to have mild (RR = 2.5; CI 95% 1.1-6.1), moderate (RR = 3.7; CI 95% 1.5-8.8) and severe (RR = 5.1; CI 95%2.1-11.9) cervical disability relative to those with episodic migraine. Relative risks remained significant after adjustments. Time since episodic or chronic migraine onset significantly influenced the model (P = .035), but age and headache intensity did not (P = .27; P = .46).
Conclusion: Neck pain significantly adds to the overall disability of individuals with episodic and chronic migraine.
(© 2014 American Headache Society.)