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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Development, validity and reliability of a questionnaire designed to evaluate rapid weight loss patterns in judo players

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Author(s):
Artioli, G. G. [1] ; Scagliusi, F. [2] ; Kashiwagura, D. [3] ; Franchini, E. [3] ; Gualano, B. [4] ; Junior, A. L. [4]
Total Authors: 6
Affiliation:
[1] Univ Sao Paulo, Sch Phys Educ & Sport, Lab Appl Nutr, Combat Sports & Martial Arts Res Grp, Av Prof Mello Moraes, 65 Butanta, Cidade Univ, BR-05508900 Sao Paulo, SP - Brazil
[2] Univ Sao Paulo, Sch Publ Hlth, Dept Nutr, Sao Paulo, SP - Brazil
[3] Univ Sao Paulo, Sch Phys Educ & Sport, Combat Sports & Martial Arts Res Grp, Sao Paulo, SP - Brazil
[4] Univ Sao Paulo, Sch Phys Educ & Sport, Lab Appl Nutr, Sao Paulo, SP - Brazil
Total Affiliations: 4
Document type: Journal article
Source: SCANDINAVIAN JOURNAL OF MEDICINE & SCIENCE IN SPORTS; v. 20, n. 1, p. E177-E187, FEB 2010.
Web of Science Citations: 22
Abstract

The aim of this study was to develop a questionnaire to evaluate rapid weight loss patterns of competitive judo players and to assess its validity and reliability. We evaluated the reliability (n=94), content validity (evaluation by 10 experts), discriminant validity (differences in scores between athletes with body weight below and above their weight class; n=100) and convergent validity (correlation with Restraint Scale; n=60). No item was considered unclear or ambiguous by more than 20% of the experts. The intraclass Coefficient Correlation was above 0.90 for all questions whose answers were parametric (P<0.001; n=94) and no significant differences were found between test and retest scores (n=94 -Wilcoxon's signed rank test). Cronbach's a was 0.98 for scores obtained between test and retest. Non-numerical questions showed proportions of agreement 480%; Spearman's Correlation between the Restraint Scale and the Rapid Weight Loss Questionnaire was 0.62 (P<0.001; n=60). Athletes below their weight class (n=50) had a significantly lower score compared with athletes above the weight class (n=50; P<0.001 - Mann-Whitney U test). In conclusion, the questionnaire showed good validity and reliability and could be used accurately to assess weight loss patterns of judo players. (AU)