Gait Profile Score (overall RMS deviation from the norm)

The Gait Profile Score (Baker et al. 2009) summarises overall gait deviation as the root-mean-square of the Gait Variable Scores across all kinematic variables (degrees). It is always non-negative and is zero when the subject equals the normative mean.

Usage

gaitProfileScore(kinematics, norm = NULL)

Arguments

kinematics: Subject kinematics: a numeric matrix with one row per kinematic variable (row names matching norm$variables) and one column per gait-cycle point, or a named list of per-variable curves. Curves are time-normalised to the norm's cycle length via normalizeMovement().
norm: A gait_norm normative reference (from PhysioGaitNorm::loadGaitNorm()); if NULL, the default reference is loaded from PhysioGaitNorm.

Value

A single non-negative numeric (degrees).

References

Baker R, et al. (2009). Gait & Posture 30(3):265-269.

Examples

norm <- list(variables = c("a", "b"),
             mean = matrix(0, 2, 51, dimnames = list(c("a", "b"), NULL)),
             cycle_length = 51)
gaitProfileScore(matrix(1, 2, 51, dimnames = list(c("a", "b"), NULL)), norm)
#> [1] 1