Abstract
The aim of this study was to assess the validity and reliability of the Fonseca Anamnestic Index (IAF), used to assess the severity of temporomandibular disorders, applied to Brazilian women. We used a probabilistic sampling design. The participants were 700 women over 18 years of age, living in the city of Araraquara (SP). The IAF questionnaire was applied by telephone interviews. We conducted Confirmatory Factor Analysis (CFA) using Chi-Square Over Degrees of Freedom (χ2/df), Comparative Fit Index (CFI), Tucker-Lewis Index (TLI), and Root Mean Square Error of Approximation (RMSEA) as goodness of fit indices. We calculated the convergent validity, the average variance extracted (AVE) and the composite reliability (CR). Internal consistency was assessed by Cronbach’s alpha coefficient (a).The factorial weights of questions 8 and 10 were below the adequate values. Thus, we refined the original model and these questions were excluded. The resulting factorial model showed appropriate goodness of fit to the sample (c2/df = 3.319, CFI = 0.978, TLI = 0.967, RMSEA = 0.058). The convergent validity (AVE = 0.513, CR = 0.878) and internal consistency (a = 0.745) were adequate. The reduced IAF version showed adequate validity and reliability in a sample of Brazilian women.
Highlights
Temporomandibular disorder (TMD) is a collective term embracing all the problems regarding the temporomandibular joint and related musculoskeletal structures.[1]The literature shows wide-ranging variation in TMD prevalence and TMD symptoms in different populations
This may be attributed to the variety of study designs, sampling methods, measurement instruments, and different diagnostic criteria for TMD
The sample size was established from an expected prevalence of TMD symptoms of approximately 40% in the female population, as presented by Gonçalves et al.[3]
Summary
Temporomandibular disorder (TMD) is a collective term embracing all the problems regarding the temporomandibular joint and related musculoskeletal structures.[1]. The literature shows wide-ranging variation in TMD prevalence and TMD symptoms in different populations. This may be attributed to the variety of study designs, sampling methods, measurement instruments, and different diagnostic criteria for TMD. In a systematic literature review, Manfredini et al.[2] found a TMD prevalence from 2.6% to 11.4% in the normative population, in different countries. Gonçalves et al.[3] found a 39.2% prevalence of TMD symptoms in the Brazilian population, in which women were significantly more likely to have TMD than men (RR > 1.0; p < 0.001). Braz Oral Res., (São Paulo) 2014;28(1):[1,2,3,4,5,6]
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