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  • Title: Longitudinal association between respiratory muscle strength and cough capacity in persons with spinal cord injury: An explorative analysis of data from a randomized controlled trial.
    Author: Postma K, Vlemmix LY, Haisma JA, de Groot S, Sluis TA, Stam HJ, Bussmann JB.
    Journal: J Rehabil Med; 2015 Sep; 47(8):722-6. PubMed ID: 26074331.
    Abstract:
    OBJECTIVE: To assess the longitudinal association between respiratory muscle strength and cough capacity in persons with recent spinal cord injury. DESIGN: Longitudinal analyses. SUBJECTS: Forty persons with recent spinal cord injury and impaired pulmonary function. METHODS: Measurements were performed 4 weeks after the start of rehabilitation, 9 and 17 weeks after the first measurement, and one year after discharge from inpatient rehabilitation. Peak cough flow was measured with a spirometer. Maximum inspiratory and expiratory pressures (MIP and MEP), expressed in cmH2O, were measured at the mouth. RESULTS: Both MIP and MEP were significantly positively associated with peak cough flow. After correction for confounders and time 10 cmH2O higher MIP was associated with a 0.32 l/s higher peak cough flow, and a 10 cmH2O higher MEP was associated with a 0.15 l/s higher peak cough flow. The association between MIP and peak cough flow was mainly based on within-subject variance. The association between MIP and peak cough flow was stronger than between MEP and peak cough flow. CONCLUSION: Improvement in respiratory muscle strength is associated with improvement in cough capacity in persons with recent spinal cord injury who have impaired pulmonary function.
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