• J Pain · Nov 2013

    Mechanical pain sensitivity and the severity of chronic neck pain and disability are not modulated across the menstrual cycle.

    • Jaclyn E Balter, Jennifer L Molner, Wendy M Kohrt, and Katrina S Maluf.
    • Rehabilitation Science and Physical Therapy Programs, University of Colorado Anschutz Medical Campus, Aurora, Colorado.
    • J Pain. 2013 Nov 1;14(11):1450-9.

    UnlabelledDespite the high prevalence of neck pain among women, menstrual effects on regional pain outcomes have not been investigated in this clinical population. This study evaluated menstrual effects on mechanical pain sensitivity (pressure pain threshold [PPT]), neck pain intensity (numeric pain rating scale [NPRS]), and neck-related disability (Neck Disability Index [NDI]) in 22 normally menstruating (NM) and 17 hormonal contraceptive users with chronic neck pain. Sex hormones, PPT, and NDI were measured during the early follicular (F1), late follicular (F2), and luteal (L) menstrual phases. Daily NPRS scores were recorded in an online symptom diary and averaged within each phase. Estradiol and progesterone increased only for NM women in F2 and L, respectively. Phase effects on PPT (η(2) = .003), NDI (η(2) = .003), and NPRS (η(2) = .016) for NM women were small and did not differ from those for the hormonal contraceptive users (P ≥ .386). Averaged across the menstrual cycle, PPT scores explained 29% of the variance in NPRS scores for NM women but were not associated with NDI scores in either group. Results indicate that the magnitude of menstrual effects on mechanical pain sensitivity and the severity of neck pain and disability do not exceed thresholds of clinically detectable change in women with chronic neck pain.PerspectiveFluctuations in evoked and clinical pain outcomes across the menstrual cycle do not appear to be of sufficient magnitude to impact clinical decision making for women with chronic neck pain.Copyright © 2013 American Pain Society. Published by Elsevier Inc. All rights reserved.

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