• 한국환경과학회:학술대회논문집
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• 한국환경과학회 2001년도 정기총회 및 봄 학술발표회 초록집
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• pp.77-81
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• 2001

• 한국식품위생안전성학회지
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• 제17권1호
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• pp.8-14
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• 2002

천연식물소재 및 한약재 추출제재인 식물추출 혼합제재가 인체내에서 니코틴 분해능에 미치는 영향을 FRCFR5 세포주, Xenopus oocyte, 임상 실험을 통하여 검토하였다. 본 실험은 체내에 잔존하는 니코틴이 식물추출 홉합 제재에 의해 무독한 대사산물인 코티닌으로 분해량이 증가되고 동시에 NNK, NNN, NNA 등과 같은 폐암 유발물질인 니트로사민 유도체 생성 경로가 억제될 것이라는 가정을 전제로 실험을 수행하였다. 본 실험 결과에서 볼 수 있듯이 식물추출 혼합 제재에는 니코틴에서 코티닌으로 전환시키는 대사 활성물질이 함유되어 있다는 사실을 알 수 있으나, 실제로 어떤 유효성분들이 관여하는지 그리고 정확한 작용 기작을 규명하기 위해서는 더 많은 분석 및 생화학적 연구가 앞으로 수행되어야 할 것이다. 간세포에서 유래된 FRCFR5 세포주 실험 결과, 니코틴과 식물추출 혼합 제재가 첨가된 배지에서 니코틴과 물을 첨가한 배지보다 니코틴에서 코티닌으로 전환능력이 약 2∼3배 높게 나타났으며, 이러한 결과는 Xenopus oocyte에 직접 주사한 경우와 거의 비슷한 양상을 보였다. 임상실험 결과 식물추출 혼합 제재음료를 음용하고 담배를 피운 실험군이 물을 음용하고 담배를 피운 대조군에 비해 약 2배 정도 높은 코티닌 함량을 나타내었다. 이는 실험군의 소변 중에 계속적으로 다량의 코티닌이 배출되는 것을 의미하며, 식물추출 혼합 제재 섭취시 체내에 존재하는 니코틴이 코티닌으로 지속적이면서 효과적으로 전환되는 것을 말한다 이상의 생체 내·외 실험에서 알 수 있듯이 식물추출혼합물은 니코틴에서 코티닌 생성을 약 2배정도 증가 시키는 것을 알 수 있었다.

• Journal of Korean Biological Nursing Science
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• 제14권2호
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• pp.103-111
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• 2012

Purpose: The purpose of this study was to identify the effect of self-efficacy promotion of the smoking cessation program on the amount of smoking, carbon monoxide level, urine cotinine level and the smoking cessation self-efficacy of adolescent smokers. Methods: The subjects composed of 24 for the experimental group and 28 for the control group who were smoking adolescents at the Middle School in G city. The data collection was done from October 13 to November 18, 2010. A nonequivalent control group pretest-posttest design was used. This program was composed on the basis of Shin (1997)'s Self-Efficacy Promoting Program. The self-efficacy promotion smoking cessation program was conducted for 2 hours per week, and lasted for 6 weeks on the experimental group. The control group had a general smoking program. Data was analyzed using SPSS/WIN 14.0 program. T-test was used to analyze outcome measures. Results: The amount of smoking, CO level, urine cotinine level, and self efficacy level of the experimental group was significantly improved more than that of the control group after intervention. Conclusion: Therefore, self-efficacy promotion smoking cessation program for adolescent smokers can be recommended for smoking cessation of adolescents.

• 한국산학기술학회논문지
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• 제17권4호
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• pp.188-198
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• 2016

본 연구의 목적은 N시에 소재한 공공병원의 금연클리닉 프로그램을 이용한 흡연 환자(입원 및 외래 포함)를 대상으로 Prochaska와 Diclemente의 변화단계모형(Transtheoretical Model, TTM)을 적용한 금연동기단계에 따른 코칭프로그램 참여 전과 후 대상자의 흡연량, 니코틴의존도, 호기 일산화탄소 농도, 소변 코티닌의 차이를 확인하기 위함이다. 연구설계는 금연동기에 따른 코칭프로그램이 환자들의 금연에 미치는 효과를 확인하기 위해 대상자의 흡연량, 니코틴의존도, 호기 일산화탄소 농도, 소변 코티닌을 프로그램 전, 2주, 6주 후간의 차이를 비교하는 다중반복 간헐적 시계열 설계연구이다. 본 연구에서 활용된 자료는 2011년 공공보건의료프로그램 중 금연프로그램을 통해 수집된 2차 자료를 활용하였다. 코칭프로그램은 6주동안 중재가 진행되며, 첫방문, 2주째 방문, 6주째 방문에 제공되며, 12주째 금연 유지 상태를 점검한다. 연구대상자의 교육 전과 교육 후 흡연량, 니코틴 의존도, 호기 일산화탄소 농도, 소변 코티닌 차이는 카이제곱 검정과 t-test로 비교하였다. 이 연구대상자는 총 47명이며, 남자는 44명(93.62%), 여자는 3명(6.38%)으로 대부분 남자였다. 금연동기단계별 대상자 수는 실천단계가 4명(8.51%), 준비단계는 43명(91.49%)이었다. 금연동기단계에 따른 코칭프로그램 전과 후를 비교한 결과, 실천단계 집단은 대부분 프로그램 전과 후 흡연량, 니코틴의존도, '0'상태를 유지하였다. 준비단계 집단은 흡연량, 니코틴의존도, 호기 일산화탄소가 프로그램 전과 6주후 유의한 차이를 보이면 감소한 것으로 나타났다(p<.001). 환자들을 대상으로 한 병원 현장에서의 금연코칭 프로그램은 매우 효과적임을 확인할 수 있었다. 하지만, 환자들을 대상으로 한 금연프로그램은 건강한 사람들에 비해 인적 재정적 부담이 더 높다. 따라서 환자들의 금연을 위해 적극적인 인적, 재정적 지원이 있어야 할 것이다.

• 대한간호학회지
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• 제30권1호
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• pp.110-121
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• 2000

This study was designed to develop the life moking cessation program with multidisciplinary approach using the Bandura's theory of self-efficacy and confirm the effect of it on the self-efficacy and smoking amount in college students. For this purpose non-equivalent control group, pretest-posttest design was used. The participating subjects in this study were 46 male college freshmen, 23 in experimental and 23 in control group. The experimental group received the 8 sessions of lecture and small group discussions for 4 weeks and a telephone coaching program for a period of 8 weeks. The control group received 5 sessions of lecture without further treatments. The data was collected from March 15 to June 11, 1999, and analysed by SAS/PC program with $\chi$$^2$test, simple t, paired t test. The results were as follows. 1. The score of self-efficacy was significantly increased over time in the experimental group than those of the control group. 2. The amount of urine cotinine was decreased over time in the experimental group, number of cigarettes smoked a day were significantly decreased, and they were significantly less than those of the control group. In conclusion it was found that the Life Smoking Cessation Program with Multidisciplinary Approach was an effective nursing intervention for increasing self efficacy and reducing the amount of smoking in male college students. Therefore, future smoking cessation programs should always consider the concept of self-efficacy and ways to positively reinforce it.

• 지역사회간호학회지
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• 제12권3호
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• pp.716-731
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• 2001

The purpose of this study was to test the effect of a self-efficacy promotion smoking cessation program for middle school students. This program was redesigned on the basis of Shin Sung Rye( 1997)' s Self-Efficacy Promoting Program for this study. The design of this paper was quasi-experimental. equivalent control group pre-post test. time series design. The subjects of this study were 53 smoker adolescents in D Middle School in the city of Busan. The results were summarized as follows: 1) The Hypothesis 1 was accepted: The self efficacy of the experimental group was higher than that of the control group after 1 week (expected efficacy t=2.20, p<.05. expected outcomes t=-2.58. p<.05) 4 weeks after education (expected efficacy t=- .19. p<.001, expected outcomes t=-2.586. p<.05). 2) The Hypothesis 2 was accepted: The amount of smoking of the experimental group was reduced more than that of the control group after 1 week (t=2.05, p<.05) and after 4 weeks (t=2.03. p<.05). 3) The Hypothesis 3 was accepted: The positive urine cotinine of the experimental group was less than that of the control group after 1 week after education($x^2$=8.57. p<.01) after 4 weeks ($x^2$=22.49. p<.001). In conclusion. a self-efficacy promotion smoking cessation program for middle school students was an effective smoking cessation program and then it will be valuable for stopping the smoking among the adolescents.

• Environmental Analysis Health and Toxicology
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• 제16권4호
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• pp.181-188
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• 2001

A gas chromatographic method was established for the simultaneous determination of urinary nicotine and cotinine. The analytes in basified urine containing a sufficient amount of Na$_2$S0$_4$were extracted into dichloromethane by vigorous shaking. Into the transferred organic phase was added a small amount of acidified methanol (0.5 N HCI in methanol), followed by concentrating the mixture to dryness using a mild stream of nitrogen gas. The concentrate was reconstituted with methanol and the final solution analyzed using the gas chromatograph equipped with the nitrogen-phosphorus detector. The reproducibility tests showed coefficients of variation less than 11％ for both compounds. The percent recovery for both analytes ranged from 88 to 103％. The estimated method detection limits for nicotine and cotinine were 0.60 and 5.1 ng/mL, respectively. Extraction efficiencies for both nicotine and cotinine apparently declined without the addition of Na$_2$S0$_4$into the urine. Moreover, the absence of methanolic HCI in the extract resulted in almost complete evaporation of nicotine and partial loss of cotinine during the concentration process, indicating that the formation of nicotine-HCI and cotinine-HCI species is prerequisite to the suppression of the loss of both compounds.

• Journal of Preventive Medicine and Public Health
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• 제40권4호
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• pp.297-304
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• 2007

Objectives : We investigated the validity of the dipstick method (Mossman Associates Inc. USA) and the expired CO method to distinguish between smokers and non-smokers. We also elucidated the related factors of the two methods. Methods : This study included 244 smokers and 50 ex-smokers, recruited from smoking cessation clinics at 4 local public health centers, who had quit for over 4 weeks. We calculated the sensitivity, specificity and Kappa coefficient of each method for validity. We obtained ROC curve, predictive value and agreement to determine the cutoff of expired air CO method. Finally, we elucidated the related factors and compared their effect powers using the standardized regression coefficient. Results : The dipstick method showed a sensitivity of 92.6%, specificity of 96.0% and Kappa coefficient of 0.79. The best cutoff value to distinguish smokers was 5-6ppm. At 5 ppm, the expired CO method showed a sensitivity of 94.3%, specificity of 82.0% and Kappa coefficient of 0.73. And at 6 ppm, sensitivity, specificity and Kappa coefficient were 88.5%, 86.0% and 0.64, respectively. Therefore, the dipstick method had higher sensitivity and specificity than the expired CO method. The dipstick and expired CO methods were significantly increased with increasing smoking amount. With longer time since the last smoking, expired CO showed a rapid decrease after 4 hours, whereas the dipstick method showed relatively stable levels for more than 4 hours. Conclusions : The dipstick and expired CO methods were both good indicators for assessing smoking status. However, the former showed higher sensitivity and specificity and stable levels over longer hours after smoking, compared to the expired CO method.

• 한국환경보건학회지
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• 제47권4호
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• pp.320-329
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• 2021

Background: Smoking exposure may be objectively assessed through specific biomarkers. The most common biomarker for smoking is cotinine concentration in urine, and setting an optimal cut-off point can accurately classify smoking status. Such a cut-off point for Korean adolescents has never been studied. Objectives: The aim of this study was to determine a cut-off point for urinary cotinine concentration for the discrimination of smoking in adolescents. Methods: Participants were adolescents aged 13~18 years who participated in the third cycle of the Korean National Environmental Health Survey. We used urine samples to confirm the level of cotinine concentrations. Smoking status was determined by self-reported questionnaire. We identified the optimal cotinine cut-off point for discriminating smoking status using receiver operating characteristic curve analysis. Results: Of the 904 participants, 28 (3.1%) were smokers, among whom 20 (71.4%) were male. The median urinary cotinine concentrations in smokers was 218 ㎍/L (male: 215 ㎍/L, female: 303 ㎍/L), and that in non-smokers was 1.31 ㎍/L (male: 1.46 ㎍/L, female: 1.18 ㎍/L). We found significant differences in urinary cotinine concentration according to smoking status and sex (p<0.001). Urinary cotinine concentrations performed well for identifying smoking adolescents [area under the curve: 0.954 (male: 0.963, female: 0.908)]. The cut-off that optimally distinguished smokers from non-smokers was 39.85 ㎍/L (sensitivity: 89.3%, specificity: 97.4%). Male [39.85 ㎍/L (sensitivity: 90.0%, specificity: 94.9%)] had a different optimal cut-off point than female [26.26 ㎍/L (sensitivity: 87.5%, specificity: 99.6%)]. Conclusions: This study determined a cut-off point for urinary cotinine of 39.85 ㎍/L (male: 39.85 ㎍/L, female: 26.26 ㎍/L) to distinguish smokers from non-smokers in adolescents.

• 한국환경보건학회지
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• 제48권4호
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• pp.216-226
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• 2022

Background: The amount of smoking in adolescence increases with a younger age of smoking initiation and affects physical health. To establish and evaluate smoking-related policies, it is important to determine actual smoking status. Validation of self-reported questionnaires can identify the accuracy of the questionnaire data reflecting smoking status. Objectives: The purpose of this study was to evaluate the validity of self-reported smoking status and identify factors affecting the accuracy of self-reported smoking in South Korean adolescents. Methods: This study investigated the consistency between cotinine concentrations and self-reported questionnaire data through the analysis of urine samples collected from 922 adolescents aged 13~18 among the participants of Cycle 3 of the Korean National Environmental Health Survey. Smoking status was classified using the cotinine cut-off point of 39.85 ㎍/L in adolescents, and factors affecting the accuracy were analyzed through multiple logistic regression analysis. Results: The smoking rates according to the self-reported questionnaire and cut-off point-based cotinine concentrations among adolescents were 3.1% and 5.1%, respectively. The results found 97.1% consistency between self-reported smokers and smokers according to cotinine concentration. Factors affecting the discrepancy showed a significant relationship, including gender, secondhand smoke, and use of e-cigarettes. Conclusions: The results can be used as basic data to establish a smoking policy for adolescents through continuous monitoring and improvement of questionnaire items of factors affecting the discrepancy.