Time series analysis of patients seeking orthodontic treatment at Seoul National University Dental Hospital over the past decade
임현우, 박지훈, 박현희, 이신재,
소속 상세정보
임현우 ( Lim Hyun-Woo ) - Seoul National University School of Dentistry Department of Dentistry
박지훈 ( Park Ji-Hoon ) - Seoul National University Graduate School Department of Orthodontics
박현희 ( Park Hyun-Hee ) - Seoul National University Graduate School Department of Orthodontics
이신재 ( Lee Shin-Jae ) - Seoul National University School of Dentistry Department of Orthodontics
KMID : 0361920170470050298
Abstract
Objective: This paper describes changes in the characteristics of patients seeking orthodontic treatment over the past decade and the treatment they received, to identify any seasonal variations or trends.
Methods: This singlecenter retrospective cohort study included all patients who presented to Seoul National University Dental Hospital for orthodontic diagnosis and treatmentbetween January 1, 2005 and December 31, 2015. The study analyzed a set ofheterogeneous variables grouped into the following categories: demographic (age, gender, and address), clinical (Angle Classification, anomaly, mode of orthodontic treatment, removable appliances for Phase 1 treatment, fixed appliances for Phase 2 treatment, orthognathic surgery, extraction, mini-plate, mini-implant, and patient transfer) and time-related variables (date of first visit and orthodontic treatment time). Time series analysis was applied to each variable.
Results: The sample included 14,510 patients with a median age of 19.5 years. The number of patients and their ages demonstrated a clear seasonal variation, which peaked in the summer and winter. Increasing trends were observed for the proportion of male patients, use of non-extraction treatment modality, use of ceramic brackets, patients from provinces outside the Seoul region at large, patients transferred from private practitioners, and patients who underwent orthognathic surgery performed by university surgeons. Decreasing trends included the use of metal brackets and orthodontic treatment time.
Conclusions: Time series analysis revealed a seasonal variation in some characteristics, and several variables showed changing trends over the past decade.
키워드
Time series analysis; Orthodontics; Trend; Seasonal variation
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