Clinico-statistical Observation of Outpatients
During Last 14 Years in Our Clinic

Tetsuya ABE, Akihiko IIDA, Ritsuo TAKAGI, Hideyuki HOSHINA,
Kazuhiro ONO, Masataka KAJI, Nobuyuki IMAI, Yukio HATTORI,
Hisao AJIMA, Yasushi OHASHI
Second Department of Oral and Maxillofacial Surgery,
Niigata University School of Dentistry
(Director: Associate Prof. RitsuoTakagi)

Abstract: A clinico-statistical observation of outpatients over 14 years from 1983 to 1997, was conducted and the results were compared with our data that was previously reported in this journal, for the first 10 years from the establishment of our clinic.
The results were as follows:
1. New outpatients in this 14 year period totaled 15,415, 6,509 males and 8,690 females. Patients in their 20's were the most frequent and accounted for 21.3% of all patients.
2. The proportion of patients from other prefectures increased from 2.6% to 4.0%.
3. The proportion of patients referred to us by another medical or dental institution, including medical hospitals affiliated with our university, showed gradual increase over the 14 year period, accounting for 50% each year.
4. The average number of patients with temporomandibular disease (from 42 to 121) and jaw deformity (from 6 to 38) showed marked increases. The average number of tumor cases for year increased from 24 to 34. The number of patients with cleft lip and/or palate did not increase. The ratio of primary cases, however, increased from 37% to 65%. The data indicate the number of outpatients with oral and maxillofacial diseases increased. Thus, our clinic appears to function as a very important institution for Oral and Maxillofacial Surgery in Niigata district.
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