Elveru RA, Rothstein JM, Lamb RR: Methods for taking subtalar joint measurements: a clinical report. .Phys Ther 68::678. ,1988. .
Mueller MJ, Host JV, Norton BJ: Navicular drop as a composite measure of excessive pronation. .JAPMA 83::198. ,1993. .
Picciano AM, Rowlands MS, Worrell T: Reliability of open and closed kinetic chain subtalar joint neutral positions and navicular drop test. .J Orthop Sports Phys Ther 18::553. ,1993. .
Keenan A-M: “Understanding Midtarsal Joint Function: Fact and Fallacy,” in Conference Proceedings: 17th Australian Podiatry Conference, Vol 1, p 107, Australasian Podiatry Council, Melbourne, 1996..
Root ML, Orien WP, Weed JH: Normal and Abnormal Function of the Foot, Clinical Biomechanics Corp, Los Angeles, 1977..
Freeman AC: A study of the inter-tester and intra-tester reliability in the measurement of resting calcaneal stance position and neutral calcaneal stance position. .Aust Podiatrist (June)::10. ,1990. .
Sell KE, Verity TM, Worrell TW, et al: Two measurement techniques for assessing subtalar joint position: a reliability study. .J Orthop Sports Phys Ther 19::162. ,1994. .
Menz HB, Keenan A-M: Reliability of two instruments in the measurement of closed chain subtalar joint positions. .The Foot 7::194. ,1997. .
Weiner-Ogilvie S, Rendall GC, Abboud RJ: Reliability of open kinetic chain subtalar joint measurement. .The Foot 7::128. ,1997. .
Weiner-Ogilvie S, Rome K: The reliability of three techniques for measuring foot position. .JAPMA 88::381. ,1998. .
Diamond J, Delitto A: Reliability of a diabetic foot evaluation. .Phys Ther 69::797. ,1989. .
Smith-Oricchio K, Harris BA: Interrater reliability of subtalar neutral, calcaneal inversion and eversion. .J Orthop Sports Phys Ther 12::10. ,1990. .
Johnson SR, Gross MT: Intrarater reliability, interexaminer reliability, and mean values for nine lower limb skeletal measures in healthy Naval midshipmen. .J Orthop Sports Phys Ther 25::253. ,1997. .
Astrom M, Arvidson T: Alignment and joint motion in the normal foot. .J Orthop Sports Phys Ther 22::216. ,1995. .
Keenan A-M: A clinician’s guide to the practical implications of the recent controversy of foot function. .Australas J Podiatr Med 31::87. ,1997. .
Menz HB: Clinical hindfoot measurement: a critical review of the literature. .The Foot 5::57. ,1995. .
Pierrynowski MR, Smith SB, Mlynarczyk JH: Proficiency of foot care specialists to place the rearfoot at subtalar neutral. .JAPMA 86::217. ,1996. .
Portney LG, Watkins MP: Foundations of Clinical Research: Applications to Practice, Prentice Hall Health, Upper Saddle River, NJ, 2000..
Rose GK, Welton EA, Marshall T: The diagnosis of flat foot in the child. .J Bone Joint Surg Br 67::71. ,1985. .
Dahle LK, Mueller M, Delitto A, et al: Visual assessment of foot type and relationship of foot type to lower extremity injury. .J Orthop Sports Phys Ther 14::70. ,1991. .
Redmond AC, Burns J, Crosbie J, et al: An initial appraisal of the validity of a criterion based, observational clinical rating system for foot posture [abstract]. .J Orthop Sports Phys Ther 31::160. ,2001. .
Michaud TC: Foot Orthoses and Other Forms of Conservative Foot Care, Thomas C. Michaud, Newton, MA, 1997..
Landis JR, Koch GG: The measurement of observer agreement for categorical data. .Biometrics 33::159. ,1977. .
Somers DL, Hanson JA: The influence of experience on the reliability of goniometric and visual measurement of forefoot position. .J Orthop Sports Phys Ther 25::192. ,2001. .
Low JL: The reliability of joint measurement. .Physiotherapy 62::227. ,1976. .
Shrout PE, Fleiss JL: Intraclass correlation: uses in assessing inter-rater reliability. .Psychol Bull 86::420. ,1979. .
Rosner B: Statistical methods in ophthalmology: an adjustment for the intraclass correlation between eyes. .Biometrics 38::105. ,1982. .
Bland JM, Altman DG: Statistical methods for assessing agreement between two measures of clinical measurement. .Lancet 1::307. ,1986. .
Garratt AM, Ruta DA, Abdalla MI, et al: The SF-36 Health Survey Questionnaire: an outcome measure suitable for routine use within the NHS. .BMJ 306::1440. ,1993. .
Bennett PJ, Patterson C, Wearing S, et al: Development and validation of a questionnaire designed to measure foot-health status. .JAPMA 88::419. ,1998. .
Repeatable measures are essential for clinicians and researchers alike. Both need baseline measures that are reliable, as intervention effects cannot be accurately identified without consistent measures. The intrarater and interrater reliability of the new Foot Posture Index and current podiatric measures of foot position were assessed using a same-subject, repeated-measures study design across three age groups. The Foot Posture Index total score showed moderate reliability overall, demonstrating better reliability than most other current measures, although navicular height (normalized for foot length) was the single most reliable measure in adults. None of the tested measures exhibited adequate reliability in young children, and, with less-than-desirable reliability being demonstrated, most measures need to be interpreted accordingly when repeated measures are involved. (J Am Podiatr Med Assoc 93(3): 203-213, 2003)