Multivariate analysis with binary response is extensively utilized in dental research due to variations in dichotomous outcomes. One of the analyses for binary response variable is binary logistic regression, which explores the associated factors and predicts the response probability of the binary variable. This article aims to explain the statistical concepts of binary logistic regression analysis applicable to the field of dental research, including model fitting, goodness of fit test, and model validation. Moreover, interpretation of the model and logistic regression are also discussed with relevant examples. Practical guidance is also provided for dentists and dental researchers to enhance their basic understanding of binary logistic regression analysis.

This study aimed to find a potential biomarker that can be used to diagnose prediabetic condition by comparing the salivary bacterial microbiomes between Thai dental patients with normoglycemia (NG) and those with potential prediabetes (PPG) conditions. Thirty-three subjects were randomly recruited. Demographic data were collected along with oral examination and unstimulated salivary collections. The salivary bacterial microbiomes were identified by high-throughput sequencing on the V3–V4 region of the bacterial 16S rRNA gene. Microbiomes in this study were composed of 12 phyla, 19 classes, 29 orders, 56 families, 81 genera, and 184 species. To check the validity of the selection criterion for prediabetes, we adopted two separate criteria to divide samples into PPG and NG groups using glycated hemoglobin A1c (HbA1c) or fasting plasma glucose (FPG) levels. Using the HbA1c level resulted in the significant reduction of Alloprevotella, Neisseria, Rothia, and Streptococcus abundances in PPG compared with those in NG (p-value < 0.05). On the other hand, the abundance of Absconditabacteriales was significantly reduced whereas Leptotrichia, Stomatobaculum, and Ruminococcaceae increased in the PPG group when the samples were classified by the FPG level (p-value < 0.05). It is implied that the group classifying criterion should be carefully concerned when investigating relative abundances between groups. However, regardless of the criteria, Rothia is significantly dominant in the NG groups, suggesting that Rothia might be a potential prediabetic biomarker. Due to the small sample size of this study, further investigation with a larger sample size is necessary to ensure that Rothia can be a potential biomarker for prediabetes in Thai people.

Diabetes mellitus (DM), especially type 2 DM, has become a common problem worldwide. Previous studies have demonstrated that chairside screening can effectively identify undetected type 2 DM patients. This study was conducted to determine dentists’ attitudes toward DM screening in dental clinics. A total of 632 currently active dentists with more than 1 year of working experience participated. The six-part (importance, barriers, willingness, readiness, knowledge, and routine management) anonymous, self-administered questionnaire of five-point response scales was then distributed. The results illustrated that most dentists (86.3%) realized the importance of DM screening and that patients’ willingness was the main potential barrier (86.4%). Of the respondents, 98.1% and 82.4% were willing to measure blood pressure and weight and height for their patients, whereas only 45.4% and 38.8% were willing to collect blood from the fingertip or oral fluids for salivary diagnostics, respectively. Moreover, 73.7% of respondents were ready to refer patients to physicians, and 59.5% could explain the relationship between DM and oral diseases. However, only 44.3% and 27.9% were prepared to provide education about DM awareness or were able to perform screening, respectively. In addition, 67.2% and 65.8% knew the screening criteria and risk factors of DM, respectively, but only 45.1% knew what to do. The result of our study provided essential knowledge with respect to dentists’ attitudes in the screening for DM in Thai dental clinics.

Background: Diabetes mellitus (DM) is one of the top causes of death in many places of the world. Diagnosing DM in the early stage is necessary to avoid severe cases and death. Objectives: To evaluate the knowledge of association between DM and periodontal disease (PD) among Thai physicians and assess their attitudes towards DM screening in dental clinics in Thailand. Methods: Online survey of currently practicing physicians in Thailand was conducted on voluntary basis using the newly developed questionnaire. Result: We received 403 responses that are statistically sufficient to represent the entire population of currently practicing physicians in Thailand. A total of 97.3% of all responses indicate that Thai physicians have knowledge about the association between DM and PD. More than 90% know that DM has an effect on PD; however, 70% know about the effect of untreated PD in DM patients. Most of physicians think that DM screening in dental clinics is important (79.1%) and are ready to accept referred cases for definite DM diagnosis from a dentist (84.1%). The concerned issues among the participants were the accuracy of the test results in DM screening (73%) and ability of a dentist to perform the screening (71.5%). Conclusions: The majority of participating physicians have adequate knowledge about the bidirectional relationship between DM and PD. They have a positive attitude towards DM screening in dental setting. The collaboration between physicians and dental professionals should be established to reduce the number of undiagnosed DM patients and enhance the medical care of DM patients.

Background: Healthy dietary behaviors are fundamental for maintaining optimal health. Understanding the dietary behaviors of dentists is vital for designing effective interventions to foster healthier behaviors. However, investigations into dietary behaviors and their associations among dental professionals have been limited. Objective: To investigate the dietary behaviors of dental professionals, along with the associated factors influencing their dietary options. Materials and methods: A self-administered online questionnaire was constructed to collect data from three groups of dental professionals: undergraduates (UG), postgraduates (PG), and practicing dentists (DT). The questionnaire encompassed inquiries regarding demographic characteristics, knowledge assessment, evaluation of attitudes, and examination of dietary behaviors. Data analysis procedures included descriptive statistics, Spearman’s rank correlation, and multiple linear regression. Results: A total of 842 individuals participated in the study (UG: 264, PG: 247, DT: 331). Attitude emerged as the strongest association of healthy dietary behaviors across all groups (UG: ß=0.370, PG: ß=0.512, DT: ß=0.642; P < 0.001), while alcohol consumption showed a negative correlation with healthy dietary behaviors (UG: ß=-0.135, PG: ß=-0.220, DT: ß=-0.216; P < 0.001). Conclusion: Significant variations in dietary behaviors across diverse educational levels of dental professionals were observed. Attitude emerged as the predominant factor influencing dietary behaviors, while knowledge was found to have a weak association. Tailored interventions addressing individual challenges at different career stages should be considered to enhance dietary behaviors and overall well-being in dental practice settings.

This study aims to investigate the attitude of Thai dentists towards the use of botulinum toxin (BTX) in dentistry and the associated factors. An online survey was conducted using a semi-structured questionnaire consisting of four parts: demographic data, background knowledge, attitude, and an open-ended question for further suggestions related to BTX usage in dental patients. Multivariate logistic regression was used to analyze factors that affect the decision to use BTX in dentistry, and a content analysis approach was used to describe open-ended suggestion data. We received 444 responses from currently practicing dentists throughout Thailand. Roughly 80% of the participants agreed to the use of BTX in their patients. Most participants were aware that BTX could be used for facial esthetic repairs and bruxism treatment but unaware of other therapeutic benefits. Despite impressively positive attitudes towards BTX use, only 5.9% of the participants had the experience of using BTX in their dental patients. The limit on BTX use is mainly due to the lack of knowledge of related laws and educational resources. In summary, official training courses should be established to promote the safe and legal use of BTX in dentistry in Thailand.