Atitudes em relação à Bioestatística de discentes e docentes da Faculdade de Ciências Farmacêuticas de Araraquara-UNESP / Attitudes towards Biostatistics of students and teachers at the Faculty of Pharmaceutical Sciences of Araraquara-UNESP

O objetivo deste estudo foi verificar a atitude de discentes e docentes da Faculdade de Ciências Farmacêuticas de Araraquara (UNESP) em relação à Bioestatística. Como instrumento de medida, utilizou-se a Escala de Atitudes em Relação à Estatística (EAE). A reprodutibilidade da Escala foi estimada pela estatística Kappa (κ) com ponderação linear e sua consistência interna pelo Coeficiente alfa-Cronbach (α). Os indivíduos foram agrupados segundo sua atitude em relação à Estatística em positiva e negativa; posteriormente, estudou-se sua associação com as variáveis de interesse pelo teste de quiquadrado (x2) ao nível de significância de 5%. A amostra foi composta por 272 alunos de graduação, 83 de pósgraduação e 24 docentes, sendo predominantemente feminina (78,2%). Entre os estudantes, 67,5% participaram do programa de iniciação científica. A reprodutibilidade e a consistência interna da Escala foram adequadas (κ=0,7093; α=0,9334). A maior parte da amostra (74,4%) apresentou atitude positiva frente à Estatística. Houve associação entre a atitude e a atividade funcional (p=0,0204), série cursada (p=0,0316) e desempenho (p=0,0002). Assim, concluise que a maioria dos participantes apresentou atitude positiva em relação à Bioestatística, sendo que os estudantes de graduação e aqueles que relataram bom desempenho em Bioestatística apresentaram proporção significativamente maior de atitude positiva em relação aos demais.

In this study, the attitudes of students and teachers at the Faculty of Pharmaceutical Sciences of Araraquara (UNESP University) towards Biostatistics were assessed. The Survey of Attitudes Toward Statistics (SATS) scale was used as the measuring instrument. The reproducibility of the scale was estimated by Cohen's Kappa (k) coefficient with linear weighting and its internal consistency by Cronbach's alpha coefficient (α). The individuals were first placed in two groups, according to their positive or negative attitude toward Statistics; then, the association of their attitude with the variables of interest was tested by the chi-squared (χ2) test at a significance level of 5%. The sample consisted of 272 undergraduate students, 83 graduate students and 24 teachers, predominantly female (78.2%). Among the students, 67.5% participated in the scientific research initial training program. Reproducibility and internal consistency of the scale were adequate ((κ=0.7093; α=0.9334). Most of the subjects (74.4%) had a positive attitude toward Statistics. Significant association was found between attitude and functional activity (p=0.0204), the course taken (p=0.0316) and effort (p=0.0002). Thus, it was concluded that the great majority of the participants had a positiveattitude towards Biostatistics and that undergraduate students and those who reported good performance in Biostatistics showed a significantly higher proportion of positive attitude than the other students.

Consistência interna e reprodutibilidade da versão em português do critério de diagnóstico na pesquisa para desordens temporomandibulares (RDC/TMD - Eixo II) / Internal consistency and reproducibility of portuguese version of research diagnostic criteria for temporomandibular disorders (RDC/TMD-Axis II)

OBJETIVO: Estudar a confiabilidade, da versão em português, do questionário para o diagnóstico psicológico e psicossocial dos indivíduos com desordens temporomandibulares (RDC/TMD). MÉTODOS: Foram entrevistados 109 indivíduos, de ambos sexos, que demandaram atendimento junto à Clínica de Fisioterapia do Centro Universitário de Araraquara, de janeiro a julho de 2006. Os questionários foram aplicados por um único examinador. Após duas semanas, o mesmo foi reaplicado em 36 indivíduos. Para avaliação da consistência interna do método, utilizou-se o Coeficiente Alfa de Cronbach; para análise da reprodutibilidade intra-examinador, o Coeficiente de Correlação Intraclasse (ro) e a estatística Kappa (kapa), respectivamente às variáveis de natureza quantitativa e qualitativa. RESULTADOS: A consistência interna para as dimensões intensidade da dor crônica e incapacidade; limitação da função mandibular; sintomas físicos não-específicos, incluindo os itens de dor; sintomas físicos não-específicos, excluindo os itens de dor e depressão foi de 0,8479, 0,8971, 0,8673, 0,8080 e 0,9270 respectivamente, atestando ao método excelente validade interna. Obteve-se "excelente" concordância intra-examinador para as questões referentes ao tempo de presença da dor e sua gradação, e "boa" para a questão referente à dor presente. Os menores valores de kapa relacionaram-se aos itens de sintomas físicos e depressão. A percepção de estalos ou rangidos pelos indivíduos apresentou concordância "regular" bem como a questão referente à procura de profissional para tratamento da dor. As demais questões apresentaram reprodutibilidade "boa" e "ótima", sendo que a maioria dessas apresentou nível máximo de concordância. CONCLUSÃO: A versão adaptada para o português mostrou-se confiável para detecção das alterações psicológicas e psicossociais associadas às desordens temporomandibulares.

OBJECTIVE: To study the reliability of the Portuguese version of a questionnaire for psychologically and psychosocially diagnosing individuals with temporomandibular disorders (RDC/TMD). METHOD: Interviews were held with 109 individuals of both sexes who required care at the physical therapy clinic of the Araraquara University Center (UNIARA) from January to July 2006. The questionnaires were applied by a single examiner. Two weeks later, the same questionnaire was reapplied to 36 individuals. To evaluate the internal consistency of the method, Cronbach's alpha coefficient was used. The intra-examiner reproducibility was analyzed using the intraclass correlation coefficient (rho) for quantitative variables and Kappa (kappa) statistics for qualitative variables. RESULTS: The internal consistency for the dimensions of chronic pain intensity, disability, limitations relating to mandibular function, nonspecific physical symptoms with pain items included, and nonspecific physical symptoms with pain items and depression excluded, were 0.8479, 0.8971, 0.8673, 0.8080 and 0.9270 respectively, thus confirming the excellent internal validity of the method. The intra-observer agreement was found to be "excellent" for questions relating to pain duration and intensity and "good" for the question relating to current pain. The lowest kappa values were associated with items relating to physical symptoms and depression. The subjects' perception of clicking and creaking also had "satisfactory" agreement, as did the question on seeking professionals for pain treatment. The remaining questions showed "good" and "very good" reproducibility and most of them presented the maximum agreement. CONCLUSION: The Portuguese adaptation of the questionnaire was shown to be reliable for detecting psychological and psychosocial abnormalities relating to temporomandibular disorders.

Comparison of simulated periodontal bone defect depth measured in digital radiographs in dedicated and non-dedicated software systems.

OBJECTIVES: To compare simulated periodontal bone defect depth measured in digital radiographs with dedicated and non-dedicated software systems and to compare the depth measurements from each program with the measurements in dry mandibles. METHODS: Forty periodontal bone defects were created at the proximal area of the first premolar in dry pig mandibles. Measurements of the defects were performed with a periodontal probe in the dry mandible. Periapical digital radiographs of the defects were recorded using the Schick sensor in a standardized exposure setting. All images were read using a Schick dedicated software system (CDR DICOM for Windows v.3.5), and three commonly available non-dedicated software systems (Vix Win 2000 v.1.2; Adobe Photoshop 7.0 and Image Tool 3.0). The defects were measured three times in each image and a consensus was reached among three examiners using the four software systems. The difference between the radiographic measurements was analysed using analysis of variance (ANOVA) and by comparing the measurements from each software system with the dry mandibles measurements using Student's t-test. RESULTS: The mean values of the bone defects measured in the radiographs were 5.07 mm, 5.06 mm, 5.01 mm and 5.11 mm for CDR Digital Image and Communication in Medicine (DICOM) for Windows, Vix Win, Adobe Photoshop, and Image Tool, respectively, and 6.67 mm for the dry mandible. The means of the measurements performed in the four software systems were not significantly different, ANOVA (P = 0.958). A significant underestimation of defect depth was obtained when we compared the mean depths from each software system with the dry mandible measurements (t-test; P approximately equal to 0.000). CONCLUSIONS: The periodontal bone defect measurements in dedicated and in three non-dedicated software systems were not significantly different, but they all underestimated the measurements when compared with the measurements obtained in the dry mandibles.

Accuracy of zoomed digital image in the detection of periodontal bone defect: in vitro study.

OBJECTIVES: (1) To evaluate the intraobserver agreement related to image interpretation and (2) to compare the accuracy of 100%, 200% and 400% zoomed digital images in the detection of simulated periodontal bone defects. METHODS: Periodontal bone defects were created in 60 pig hemi-mandibles with slow-speed burs 0.5 mm, 1.0 mm, 1.5 mm, 2.0 mm and 3.0 mm in diameter. 180 standardized digital radiographs were made using Schick sensor and evaluated at 100%, 200% and 400% zooming. The intraobserver agreement was estimated by Kappa statistic (kappa). For the evaluation of diagnostic accuracy receiver operating characteristic (ROC) analysis was performed followed by chi-square test to compare the areas under ROC curves according to each level of zooming. RESULTS: For 100%, 200% and 400% zooming the intraobserver agreement was moderate (kappa=0.48, kappa=0.54 and kappa=0.43, respectively) and there were similar performances in the discrimination capacity, with ROC areas of 0.8611 (95% CI: 0.7660-0.9562), 0.8600 (95% CI: 0.7659-0.9540), and 0.8368 (95% CI: 0.7346-0.9390), respectively, with no statistical significant differences (chi2-test; P=0.8440). CONCLUSIONS: A moderate intraobserver agreement was observed in the classification of periodontal bone defects and the 100%, 200% and 400% zoomed digital images presented similar performances in the detection of periodontal bone defects.

Oral cancer mortality trends in Brazilian geographical regions from 1996-2001

The purpose of this study was to analyse the oral cancer mortality trends in Brazil by geographic region, age and sex, from 1996 to 2001. The Brazilian Ministry of Health database DATASUS and the Brazilian Institute of Geography and Statistics were used as the source of data. Oral cancer mortality rates per 100,000 population were estimated. Statistical analyses comprised estimates of oral cancer mortality rates, grouped according to the study variables, in 1996, 1997, 1998, 1999, 2000 and 2001; also, the three-year periods 1996-1998 and 1999-2001 were analysed, allowing the oral cancer mortality trends between these two periods to be calculated. For comparison, in each geographical region, the ratio between two death rates (related to period or sex) was calculated. In the period 1996-2001, a total of 25,972 deaths due to oral cancer were reported, giving a mortality rate of 2.67. The rates for the periods 1996-1998 and 1999-2001 were 2.53 and 2.73, respectively, showing a slight increase in the rate. There was a predominance of oral cancer in males with a male/female ratio of approximately 4. All regions exhibited an increase in mortality rates, with the exception of the Southeast region. From 1996 to 2001, the average mortality rates were 3.55 and 3.58 for the Southeast and South regions, and 1.94, 1.41, and 0.86 for the Mid-West, Northeast, and North regions, respectively. Over the age of 40, oral cancer mortality rates were seen to increase rapidly with age. Oral cancer mortality increased in all regions, exceptin the Southeast, and was considerably higher among males and older individuals.

Evaluation of motivation methods used to obtain appropriate oral hygiene levels in schoolchildren.

The aim of the present study is to assess the behaviour of different motivation methods on levels of oral hygiene among schoolchildren aged from 7 to 9 years in Araraquara, SP, Brazil. The methods tested were: indirect instruction using 'The Smiling Robot' (group I), indirect instruction through class presentation (group II) and direct instruction with macromodels (group III). A control group was also constituted, which received no kind of motivation (group IV). The O'Leary Plaque Index was used as the evaluation method, applied before the instruction and 30 days after application of the different methods. It was noted that the plaque index had not decreased in group IV only. In conclusion, all the motivation methods promoted significant decrease of plaque index and among these methods, the 'The Smiling Robot' was the one that provided the best results.

A survey of radiographic prescription in dental implant assessment.

OBJECTIVES: To survey the current radiographic prescriptions in dental implant assessment amongst dentists in Brazil. METHODS: Sixty-nine dentists were interviewed during a dental implant meeting by two calibrated graduate students, using a 19-question questionnaire, considering imaging modality options both for pre-operative implant site assessment and for follow-up, particularly with respect to cost, patient radiation dose, and broad coverage of facial bones and teeth. Epi-Info 6.04 software was used to analyse the database file. RESULTS: Approximately 63.8% of the dentists prescribed only panoramic radiography for dental implant assessment and 28.9% ordered panoramic radiography plus periapical radiography and/or conventional tomography and/or computed tomography (CT). Only 7.2% of the dentists ordered conventional tomography or CT as a single examination, although 10.1% ordered it in combination with other imaging modalities. The main reasons given for prescribing panoramic radiography were broad coverage and cost (86.4%). CONCLUSIONS: This study has shown that most of the dentists in this study prescribe panoramic radiographs in dental implant assessment based on broad coverage and cost. They are not following the American Academy of Oral and Maxillofacial Radiology recommendations regarding cross-sectional imaging.