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Table 3 Equations to predict the 6 minute walk distance in children and adolescents

From: Reference values for the 6-minute walk test in healthy children and adolescents in Switzerland

Model Age-adjusted p + height-, weight-adjusted p + vitals and physical activity score (PAS) p
Population (age in years (y)) (age in y, height in m, weight in kg) (heart rate (HR) in bpm, PAS 1-4)
General 11.89 *y + 486.1 .000, .000 391.9*m -2.41* kg + 140.2 .000, .000, .000 192.69*m + 1.27*exHR + 161.55 .000, .000, .000
Males 15.36 *y + 456.92 .000, .000 13.40*y -2.16*kg + 196.53*m + 276.92 .001, .001, .017, .000 14.38*y + 1.21*exHR – 2.12*kg + 166.66*m + 146.56 .000, .000, .001, .037
< 13 y 24.18*y + 385.18 .000, .000 As age-adjusted   28.62*y + 1.26*exHR -2.034*kg + 239.29 .000, .000, .014, .000,
13 y 13.08*y + 476.69 .031, .000 As age-adjusted   1.01*exHR + 13.3*y + 338.25 .001, .022, .000
Females 8.623*y + 513.7 .000, .000 372.3*m -2.635*kg + 172.05 .000, .000, .001 152.58*m + 1.38*exHR + 197.97 .000, .000, .000
< 12 y 20.83*y + 413.94 .000, .000 330.07*m + 153.3 .000, .000 279.5*m + .87*exHR + 102.45 .000, .000, .024
12 y -8.66*y + 757.42 .000, .036 -1.867 * kg + 734.29 .001, .000 1.79*exHR – 1.28*restHR – 2.55*kg + 203.3*m + 7.83*PAS + 298.6 .000, .000, .000, .023, .032, .030
  1. *multiplied by, Y years, m meters of body height, kg kilogram body weight, HR heart rate, restHR heart rate before the 6MWD, exHR HR after the 6MWD. PAS physical activity score as measure of self-reported activity going from 0 (0 hours weekly of physical activity beside school sports to >4 hours of physical activity) to 4 P values are given for all parameters added in the equation model in order that the reader can see the impact of each measure to the equation.