Normative Value for Navicular Drop Test in Older Adults

Determination of Normative Values of Navicular Height and Navicular Drop Amount in Geriatric Individuals and Investigation of the Effect of Age, Gender and Body Mass Index on Normative Values

The aim of this study is to determine the normative values of navicular height and navicular drop in individuals over 65 years of age. The secondary aim is to investigate the effects of age, gender, and body mass index on these normative values.

Study Overview

• Status: Completed
• Conditions: Healthy

• Study Type: Observational
• Enrollment (Actual): 100

Contacts and Locations

Study Locations

• Turkey (Türkiye)
  • Istanbul
    • Kadıköy, Istanbul, Turkey (Türkiye), 34000
      • Nilüfer Kablan

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 65 years and older (Older Adult)
• Accepts Healthy Volunteers: Yes

• Sampling Method: Non-Probability Sample

Study Population

Healthy older adults

Description

Inclusion Criteria:

• Being 65 years or older
• Having a body mass index between 18.5 and 29.0 kg/m2

Exclusion Criteria:

• Having chronic diseases that affect the foot structure and connective tissue (such as diabetes mellitus, rheumatoid arthritis, gout, etc.).
• Have had foot or ankle surgery in the last 6 months
• Having orthopedic or neurological deformities (related to stroke, Parkinson's, multiple sclerosis, spinal cord injury, etc.) that will affect the foot structure and mobility.
• Dependence on standing and ambulation (except independence gained through the use of assistive devices)

Study Plan

How is the study designed?

Design Details

• Observational Models: Cohort
• Time Perspectives: Cross-Sectional

Number of groups / cohorts

3

Cohorts and Interventions

Group / Cohort
Young older adults; ≥65-<75 years of age
Older adults; ≥75-<90 years of age
≥90 years old

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Navicular Drop Test	The navicular height and the amount of navicular drop will be made separately for each foot. The navicular prominence is found by palpation and marked with a marker pen when the individual is in a sitting position with the hips and knees flexed to 90 degrees and the subtalar joint in neutral position (the subtalar joint is palpated and the talus is in a neutral position). The height of the navicular protrusion from the ground is measured with a rigid ruler. Then, while the person stands on both feet equally, the height of the navicular protrusion from the ground is also measured with a ruler. The difference between the two measurements is noted as the amount of "navicular drop" (NDT).	10 minutes

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Age	Age	1 minute
Gender	Gender	1 minute
Body-Mass index	weight/ (height)2	3 minutes
Foot Posture Index	FPI	15 minutes

Collaborators and Investigators

• Sponsor: Istanbul Medeniyet University

Study record dates

Study Major Dates

• Study Start (Actual): April 1, 2023
• Primary Completion (Actual): May 1, 2024
• Study Completion (Actual): August 1, 2025

Study Registration Dates

• First Submitted: October 24, 2022
• First Submitted That Met QC Criteria: October 24, 2022
• First Posted (Actual): October 27, 2022

Study Record Updates

• Last Update Posted (Actual): July 30, 2026
• Last Update Submitted That Met QC Criteria: July 28, 2026
• Last Verified: July 1, 2026

More Information

Terms related to this study

• Other Study ID Numbers: IstanbulMU81

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No