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Reliability and normative values for the foot mobility magnitude: a composite measure of vertical and medial-lateral mobility of the midfoot.

McPoil TG, Vicenzino B, Cornwall MW, Collins N, Warren M - J Foot Ankle Res (2009)

Bottom Line: Normative data are provided for the left and right feet of both the female (n = 211) and male (n = 134) subjects.While the measurements of navicular drop and drift have been used as a clinical method to assess both the vertical and medial-lateral mobility of the midfoot, poor to fair levels of inter-rater reliability have been reported.The results of the current study suggest that the foot mobility magnitude provides the clinician and researcher with a highly reliable measure of vertical and medial-lateral midfoot mobility.

View Article: PubMed Central - HTML - PubMed

Affiliation: Gait Research Laboratory, Program in Physical Therapy, Northern Arizona University, Flagstaff, Arizona, USA. tom.mcpoil@nau.edu.

ABSTRACT

Background: A study was conducted to determine the reliability and minimal detectable change for a new composite measure of the vertical and medial-lateral mobility of the midfoot called the foot mobility magnitude.

Methods: Three hundred and forty-five healthy participants volunteered to take part in the study. The change in dorsal arch height between weight bearing and non-weight bearing as well as the change in midfoot width between weight bearing and non-weight bearing were measured at 50% of total foot length and used to calculate the foot mobility magnitude. The reliability and minimal detectable change for the measurements were then determined based on the assessment of the measurements by three raters with different levels of clinical experience.

Results: The change in dorsal arch height between weight bearing and non-weight bearing, midfoot width between weight bearing and non-weight bearing, and the foot mobility magnitude were shown to have high levels of intra-rater and inter-rater reliability. Normative data are provided for the left and right feet of both the female (n = 211) and male (n = 134) subjects.

Conclusion: While the measurements of navicular drop and drift have been used as a clinical method to assess both the vertical and medial-lateral mobility of the midfoot, poor to fair levels of inter-rater reliability have been reported. The results of the current study suggest that the foot mobility magnitude provides the clinician and researcher with a highly reliable measure of vertical and medial-lateral midfoot mobility.

No MeSH data available.


Use of modified digital caliper to measure midfoot width in weight bearing.
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Figure 3: Use of modified digital caliper to measure midfoot width in weight bearing.

Mentions: Three instruments were manufactured for the study to permit the measurement of both arch height and midfoot width. The weight bearing arch height gauge consisted of a digital caliper (Model #93293, Cen-Tech, Harbor Freight Tools, Carmarillo, CA 93011) with the fixed point attached to a 1.2 × 5.0 × 10.0 cm plastic block to hold the caliper in a vertical position and a sliding metal rod attached to the moving point of the caliper to permit the assessment of arch height (see Figure 1). To assess non-weight bearing arch height, a second identical digital caliper with the same modifications as described for the weight bearing arch height gauge was mounted to a 0.5 × 12.0 × 41.0 cm plastic portable platform (see Figure 2). The plastic block attached to the fixed point of the caliper was attached to the portable platform so that it could be moved in order to permit proper alignment of the sliding metal rod to different foot lengths. To enhance the participant's awareness of the platform touching the plantar surface of their foot, 80-grit sandpaper was taped to the superior surface of the portable platform. A third digital caliper (Model # S54-101-150-2, Fowler Equipment, Newton, MA 02466) was modified, to permit the measurement of midfoot width in both weight bearing and non-weight bearing by attaching 0.03 × 0.8 × 9.0 cm metal plates to both the fixed and the moving points of the caliper (see Figure 3).


Reliability and normative values for the foot mobility magnitude: a composite measure of vertical and medial-lateral mobility of the midfoot.

McPoil TG, Vicenzino B, Cornwall MW, Collins N, Warren M - J Foot Ankle Res (2009)

Use of modified digital caliper to measure midfoot width in weight bearing.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2656480&req=5

Figure 3: Use of modified digital caliper to measure midfoot width in weight bearing.
Mentions: Three instruments were manufactured for the study to permit the measurement of both arch height and midfoot width. The weight bearing arch height gauge consisted of a digital caliper (Model #93293, Cen-Tech, Harbor Freight Tools, Carmarillo, CA 93011) with the fixed point attached to a 1.2 × 5.0 × 10.0 cm plastic block to hold the caliper in a vertical position and a sliding metal rod attached to the moving point of the caliper to permit the assessment of arch height (see Figure 1). To assess non-weight bearing arch height, a second identical digital caliper with the same modifications as described for the weight bearing arch height gauge was mounted to a 0.5 × 12.0 × 41.0 cm plastic portable platform (see Figure 2). The plastic block attached to the fixed point of the caliper was attached to the portable platform so that it could be moved in order to permit proper alignment of the sliding metal rod to different foot lengths. To enhance the participant's awareness of the platform touching the plantar surface of their foot, 80-grit sandpaper was taped to the superior surface of the portable platform. A third digital caliper (Model # S54-101-150-2, Fowler Equipment, Newton, MA 02466) was modified, to permit the measurement of midfoot width in both weight bearing and non-weight bearing by attaching 0.03 × 0.8 × 9.0 cm metal plates to both the fixed and the moving points of the caliper (see Figure 3).

Bottom Line: Normative data are provided for the left and right feet of both the female (n = 211) and male (n = 134) subjects.While the measurements of navicular drop and drift have been used as a clinical method to assess both the vertical and medial-lateral mobility of the midfoot, poor to fair levels of inter-rater reliability have been reported.The results of the current study suggest that the foot mobility magnitude provides the clinician and researcher with a highly reliable measure of vertical and medial-lateral midfoot mobility.

View Article: PubMed Central - HTML - PubMed

Affiliation: Gait Research Laboratory, Program in Physical Therapy, Northern Arizona University, Flagstaff, Arizona, USA. tom.mcpoil@nau.edu.

ABSTRACT

Background: A study was conducted to determine the reliability and minimal detectable change for a new composite measure of the vertical and medial-lateral mobility of the midfoot called the foot mobility magnitude.

Methods: Three hundred and forty-five healthy participants volunteered to take part in the study. The change in dorsal arch height between weight bearing and non-weight bearing as well as the change in midfoot width between weight bearing and non-weight bearing were measured at 50% of total foot length and used to calculate the foot mobility magnitude. The reliability and minimal detectable change for the measurements were then determined based on the assessment of the measurements by three raters with different levels of clinical experience.

Results: The change in dorsal arch height between weight bearing and non-weight bearing, midfoot width between weight bearing and non-weight bearing, and the foot mobility magnitude were shown to have high levels of intra-rater and inter-rater reliability. Normative data are provided for the left and right feet of both the female (n = 211) and male (n = 134) subjects.

Conclusion: While the measurements of navicular drop and drift have been used as a clinical method to assess both the vertical and medial-lateral mobility of the midfoot, poor to fair levels of inter-rater reliability have been reported. The results of the current study suggest that the foot mobility magnitude provides the clinician and researcher with a highly reliable measure of vertical and medial-lateral midfoot mobility.

No MeSH data available.