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Evaluation of the Reliability of Salivary Testing Instrument

타액검사기의 신뢰도 평가

  • Han, Keumah (Department of Periodontology, Sejong Dental Hospital, School of Dentistry, Dankook University) ;
  • Lee, Joonhaeng (Department of Pediatric Dentistry, Sejong Dental Hospital, School of Dentistry, Dankook University)
  • 한금아 (단국대학교 치과대학 세종치과병원 치주과) ;
  • 이준행 (단국대학교 치과대학 세종치과병원 소아치과)
  • Received : 2018.07.05
  • Accepted : 2018.07.25
  • Published : 2018.08.31

Abstract

A salivary testing instrument has an advantage that the method is simple and can be performed in a short time. However, it is necessary to verify the factors that affect the reliability of the result, because the device is easy to use and even saliva collection is simple. The aim of this study was to compare the difference of the test results according to the measurement time in order to analyze the time factor of the external variable among the factors that may affect the measurement results of the salivary testing instrument. The relationship between the measured values of the salivary testing instrument to identify the internal variables was analyzed. Saliva was collected from 20 randomly selected patients regardless of age, sex, or diseases. The mean age was 46.6 years, 10 males and 10 females. The saliva collected was directly measured with the salivary testing instrument as group I. The saliva samples were placed in air in a paper cup for 10 minutes, and then measured as group III. Then group I was remeasured after 30 minutes and assigned as group II. Group III was remeasured after 30 minutes and called as group IV. As a result, all of the cariogenic bacteria, acidity, buffer capacity, blood, leukocyte, protein and ammonia, except buffer capacity, showed statistically significant changes in group II and IV. This means that the reliability of the test results is poor if the measurement time is not observed. Cariogenic bacteria were correlated with leukocyte and protein, buffer capacity was related to acidity, protein, and protein was related to buffer capacity and leukocyte. In conclusion, the result according to the measurement time as the external variable was different, which means that time must be strictly monitored when testing saliva. It is also necessary to take into account the relevance of the correlations between the internal variables and the clinical data.

타액검사기는 방법이 간단하고 단시간 내에 검사를 할 수 있는 장점이 있다. 하지만 타액 채취가 용이하고 장치의 사용이 간단하나 그 결과의 신뢰성에 영향을 미치는 요인에 대해서는 검증해 볼 필요가 있다. 이번 연구는 타액검사기의 측정 결과에 영향을 미칠 수 있는 요인 중 외부변수인 시간적 요인을 분석하기 위해 측정 시간에 따른 검사 결과의 차이를 비교하였다. 또한 내부변수를 파악하기 위해 타액검사기 측정값 사이의 관련성을 분석하였다. 나이, 성별, 질환의 유무에 상관없이 무작위적으로 선정한 20명의 사람들을 대상으로 하여 타액을 채취하였다. 평균 나이는 46.6세였고, 남자 10명, 여자 10명이었다. 채취한 타액을 바로 타액검사기로 측정한 것을 I군으로 하였다. 또한 채취한 타액을 종이컵에서 10분간 공기중에 방치한 후 타액검사기로 측정한 것을 III군으로 하였다. 그리고 I군으로 사용한 것을 30분 후 재 측정하여 II군으로, III군으로 사용한 것을 30분 후 재 측정한 것을 IV군으로 하였다. 실험 결과 cariogenic bacteria, acidity, buffer capacity, blood, leukocyte, protein and ammonia 중 buffer capacity만 제외하고 나머지는 모두 II, IV군에서 유의한 변화가 있었다. 또한 측정값 중 cariogenic bacteria는 leukocyte, protein과 상호관련성이 있었고 buffer capacity는 acidity, protein과, 그리고 protein은 buffer capacity, leukocyte와 연관성이 있었다. 결론적으로 외부변수인 측정 시간에 따른 측정결과 값의 차이는 각각 다르게 나타났으며, 이는 타액검사 시 시간요인의 중요성을 의미하는 것이다. 또한 내부변수인 측정값 간의 상호관계를 이용하여 임상적으로 접근할 경우 그 연관성에 대한 고려가 필요하다.

Keywords

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