Journal of the Korean Association of Oral and Maxillofacial Surgeons

Table. 2. Table 2

Study quality analysis (STROBE checklist)

Criteria	Schmidt et al.⁶ (1986)	Yasui et al.³ (2015)	Rekhi et al.⁴ (2018)
Title and abstract	Indicate the study’s design and informative and balanced summary.	+	+	+
Introduction	Presents the scientific background and correlates with the research.	+	+	+
	Specific objectives	-	+	+
Methods	Present the study design early	+	+	+
	Describe in detail all information about data collection.	+	+	+
	Provide in detail the eligibility criteria and the sources and methods of selecting participants.	+	+	+
	Clearly define all outcomes, exposures, predictors, potential confounders, and effect modifiers.	+	-	+
	For each variable of interest, give sources of data and details of methods of assessment and describe comparation if there is more than one group.	-	-	+
	Describe any efforts to address potential sources of bias.	-	-	-
	Explain the sample size.	+	+	+
	Explain how quantitative variables were handled in the analyses.	+	-	+
	Describe all statistical methods; Explain how missing data were addressed; If applicable, explain how loss to follow-up was addressed.	-	-	+
Results	Report numbers of individuals at each stage of study.	+	+	+
	Give characteristics of study participants and information on exposures and potential confounders; Indicate number of participants with missing data for each variable of interest; Summarize follow-up duration.	+	+	+
	Report numbers of outcome events or summary measures over time.	+	+	+
	Give unadjusted estimates and, if applicable, confounder-adjusted estimates and their precision; Report category boundaries when continuous variables were categorized.	-	+	+
	Report other analyses performed.	+	+	+
Discussion	Summarize key results with reference to study objectives.	+	+	+
	Discuss limitations of the study, taking into account sources of potential bias or imprecision.	-	+	-
	Provide a cautious overall interpretation of results considering objectives, limitations, multiplicity of analyses, results from similar studies, and other relevant evidence.	+	+	+
	Discuss the generalizability (external validity) of the study results.	+	+	+
Other information	Present the source of funding and the role of the funders in the present study and, if applicable, for the original study on which the present article is based.	-	-	-
Total score		15 of 22	16 of 22	19 of 22
Study quality		Good	Good	Good

(STROBE: Strengthening the Reporting of Observational Studies)

J Korean Assoc Oral Maxillofac Surg 2023;49:61~67
https://doi.org/10.5125/jkaoms.2023.49.2.61