The Functional Gait Assessment in Older Adults: Validation Through Rasch Modeling

Marianne Beninato; Larry H. Ludlow

doi:10.2522/ptj.20150167

Figures

Figure 2.

Person-item map without Functional Gait Assessment (FGA) items 7 (“gait with narrow base of support”), 8 (“gait with eyes closed”), and 9 (“ambulating backwards”). Patients are plotted on the map with those who are less able locating at the bottom of the map and those who are more able locating at the top of the map. Each “#” represents a count of 2 people, and each “.” is a count of 1 person. Associated logit values are indicated to the left of the map. FGA items are plotted on the right side of the map, with increasing difficulty from bottom to top. The mean ability and mean difficulty of items are both denoted by “M.” “S”=1 standard deviation from the mean; “T”=2 standard deviations from the mean.

Figure 1.

Person-item map. Patients are plotted on the map with those who are less able locating at the bottom of the map and those who are more able locating at the top of the map. Each “#” represents a count of 2 people, and each “.” is a count of 1 person. Associated logit values and Functional Gait Assessment (FGA) scores are indicated to the left of the map. FGA items are plotted on the right side of the map, with increasing difficulty from bottom to top. The mean ability and mean difficulty of items are both denoted by “M.” “S”=1 standard deviation from the mean; “T”=2 standard deviations from the mean.