Agreement of different reference equations to classify patients with COPD as having reduced or preserved 6MWD.

A study published in Pulmonology examined how well different reference equations agree when categorizing COPD patients as having either reduced or preserved six-minute walk distance (6MWD). Because the 6MWT is widely used in cardiopulmonary rehabilitation and PT outcome measurement, inconsistent reference equations can lead to conflicting clinical classifications of the same patient. Physical therapists working with COPD populations should be aware that the choice of reference equation may meaningfully affect how functional exercise capacity is interpreted.

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