Nikanishi et al reported an equation for predicting daily step count in a Japanese patient with chronic obstructive pulmonary disease (COPD). The authors are from multiple institutions in Japan.
Patient selection: Japanese adult with COPD
Parameters:
(1) age in years
(2) modified MRC dyspnea scale (from 0 to 4)
(3) inspiratory capacity in liters
X =
= (2.078 * (inspiratory capacity)) - (1.595 * (mMRC)) - (0.079 * (age)) + 18.149
predicted daily step count =
= X^3
Interpretation:
• Most patients have a daily step count less than 10,000.
• The upper limit in the study cohort was around 20,000.
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Specialty: Sports Medicine & Rehabilitation
