• The Korean Journal of Applied Statistics
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• v.36 no.5
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• pp.415-445
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• 2023

Oftentimes, the time dependent treatment covariate and the time dependent confounders exist in observation studies. It is an important problem to correctly adjust for the time dependent confounders in the propensity score analysis. Recently, In the survival data, Hade et al. (2020) used a propensity score matching method to correctly estimate the treatment delay effect when the time dependent confounder affects time to the treatment time, where the treatment delay effects is defined to the delay in treatment reception. In this paper, we proposed the Cox model based marginal structural model (Cox-MSM) framework to estimate the treatment delay effect and conducted extensive simulation studies to compare our proposed Cox-MSM with the propensity score matching method proposed by Hade et al. (2020). Our simulation results showed that the Cox-MSM leads to more exact estimate for the treatment delay effect compared with two sequential matching schemes based on propensity scores. Example from study in treatment discontinuation in conjunction with simulated data illustrates the practical advantages of the proposed Cox-MSM.

• Journal of Society of Preventive Korean Medicine
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• v.3 no.1
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• pp.35-54
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• 1999

This thesis shows about the meaning of treatment rate increasing, the current treated level and the reason of low treatment rate and increasing methods. 1. Treatment rate incresing means high treat level within short time, keeping treatment effect for a long time as well as raising treatment rate. 2. The current by diseases each others completed treatment rate of oriental medicine is 14.0% to 89.7%$(mean:\;{\pm}40.0%)$. Therefore the rate is show too low. 3. The reasons of low treatment rate; low academic level of oriental, academic limitation, clinic and prevention problem of oriental medicine, lack of medical approch suitable for current diseases and symptoms, mostly incurrable diseases using oriental medicine, lack of preventive education, disappropriate medical service and nonspecialty of the treatment, etc. 4. The next methods for incresing the treatment rate must be improved; such as accurate establishment of process that diagnosis symptoms and treats them, system research of microdiagnosis, positive treatment with medicine and nonmedicine method at the same time, appropriate subdivision and actualization of clinical basic research, research of dose and response, diversity of treatment methods and forms, development of treatment service and prevention based on health level, enormous change as cure medicine and opening-up of new disease field, specialization of medical examination, reinforcement of public medical part and herbal drugs use with same origin, mental and pysical stability of patients, accurate extract and oral drinking ways, etc.

• Journal of the korean academy of Pediatric Dentistry
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• v.21 no.2
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• pp.469-485
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• 1994

The present study was undertaken to examine the relationship between time required for each step in the treatment process for pedodontic patients. and age of the patients, and experience of special training for pedodontics and career of dental practitioners. Information of these matters was gained from 580 questionnaires collected from 69 practitioners (62 male and 7 female). The questionnaires included questions about the patients' sex(303 male and 207 female) and age. The patients were categorized into 5 different age groups : Group 1, age $1{\sim}3$-year ; Group 2, $4{\sim}6$-year ; Group 3, $7{\sim}9$-year ; Group 4, $10{\sim}12$-year ; Group 5, $13{\sim}15$-year. The questions about the dental practitioners were the years of experience in private dental practice(5 years or more than 5 years) and whether or not they took the special training for pedodontics in the authorized institutes. The practitioners were asked to answer the questions about Frankl scale of the patients' behavior during the treatment, and time spent for managing the patients to be subjected to local anesthetic injection (the first behavior control), time for the injection, and time for the subsequent treatment. The results obtained by analyzing the information collected from the questionnaires were as follows : 1. The younger the patients, the lower the Frankl scale was counted at the time of the first behavior control, injection, and the subsequent treatment(p<0.001). 2. The lowest Frankl scale was scored during the injection regardless of the age of the patients. 3. Time for management and treatment was decreased in the order of age Groups 1 and 2< Group 3 < Groups 4 and 5. 4. The patients showed a more positive frankl scale in response to the treatment performed by those who were more-experienced in dental practice as compared with those were less-experienced. 5. Pedodontic training experience of the practitioners did not appear to influence the patients with respect to the treatment time and Frankl scale.

• Korea Journal of Hospital Management
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• v.8 no.2
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• pp.49-69
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• 2003

This study purported to evaluate the performance of the appointment system for outpatients in primary care dental clinic. The data of patients' time flow for 1,245 patients in Y Dental Clinic were collected for one month in 2002 and then analyzed. Specifically, the time periods of treatment and patients' waiting as well as rates of appointment and it's failure are estimated. The accuracy of expected treatment time period was also evaluated. The results showed that 72% of patients visited the clinic with appointments, and only 56% kept their appointments. The patient's waiting time period turned out to be 11 minutes in Y clinic. The expected treatment time period is turned out to be very important because they influence significantly on patient's waiting time period. Practically, the expected treatment time period should be overestimated about 9 minutes in general, and the characteristics of dentist, each patient's diagnosis and age need to be especially considered. Hospitals and clinics also need to make the systematic and detailed critical pathways for a variety of patient cases by analyzing the patients' treatment pattern. With the improved appointment systems, healthcare institutions will approach the goal of effective and efficient management of the institution and also satisfy their customers.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.10 no.1
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• pp.9-15
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• 2007

The study was conducted to find out the harvesting time, storage duration, cold treatment and sterilization on seed germination of Miscanthus sinensis. The optimum harvesting time of the Miscanthus seed in native to Jeju island was December. And the seed germination passible 3 years after harvesting. When the seeds had cold treatment, seed germination nate was 74% rather than 63% of non-treatment. For seed sterilization treatment, soaking in solution of Benomyl 7% during from 3 hours to 12 hours germinated 9% over. But the non-treatment on 24 hours treatment reduced the seed germination of Miscanthus sinensis.

• Journal of the Korean Society for Heat Treatment
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• v.30 no.3
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• pp.99-105
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• 2017

This study was carried out to investigate the effect of heat treatment on the microstructure and mechanical properties in 90% hot forged Incoloy 825 alloy. With increasing solution treatment temperature, the grain size increased and the volume fraction of total precipitates decreased, and the precipitates disappeared at $1,000^{\circ}C$. With increasing aging time at $700^{\circ}C$, the volume fraction of precipitate increased and the precipitates size increased. Most of the precipitates consist $Cr_{23}C_6$ carbide, and a small amount of TiC carbide was also observed. With decreasing solution treatment temperature and increasing aging time, tensile strength and hardness increased, and the elongation and impact value decreased. With increasing aging time, the impact value decreased sharply by the increased of the precipitate size.

• The Journal of Korean Physical Therapy
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• v.15 no.3
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• pp.388-411
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• 2003

The purpose of this study has been conducted to reduce the lower limbs' spasticity of the patients with hemiplegia caused by cerebral stroke of apoplexy and find differences about spasticity effects among each group. The objects of this study covered 24 patients with hemiplgia who are either in the oo hospital in Daegu or under treatment from home to hospital. The objects fall into three groups which are a group of neurological development treatment, a group of functional stimulus treatment and a group of neurological development treatment and functional stimulus treatment. The result of this study were as follows : 1) The neurological development treatment has been found to reduce the lower limbs' spasticity of patients with hemiplegia caused by cerebral stroke of apoplexy and compared to before-treatment, the MAS value of spasticity has been shown to be statistically meaningful ,and gradually over the period of between 4 weeks and 8 weeks(P <.05). 2) The functional electric stimulus treatment has been shown to reduce the lower limb's spasticity of patients with hemiplegia caused by cerebral stroke of apoplexy and compared to before-treatment, the MAS value of spasticity was statistically meaningful and compared to 4 weeks, even at the time of 8 weeks, the MAS value of spasticity have shown statistical meaningness. (P <.05) 3) When neurological development treatment and functional electric stimulus treatment was applied at the same time, the lower limbs' spasticity of patients with hemiplegia was reduced meaningfully(P <.05). Compared to before-treatment at the time of 4 weeks, the MAS value of spasticity was statistically meaningful and compared to 4 weeks at the time of 8 weeks the MAS value of spasticity was also statistically meaningful(P <.05) 4) In the case of time-based MAS value of each group, functional electric stimulus treatment reduced the spasticity more meaningfully than neurological development treatment, and the group of same application of functional electric stimulus treatment and neurological development treatment showed better statistical meaningness than functional electric stimulus treatment alone(P <.05) and finally the group of same application of neurological development treatment and functional electric stimulus treatment showed more meaningful difference than neurological development treatment alone(P <.05)

• The Journal of Pediatrics of Korean Medicine
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• v.34 no.3
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• pp.18-36
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• 2020

Objectives The purpose of this study is to analyze Chinese randomized controlled trials (RCTs), and to evaluate the effectiveness and safety of the oral herbal medicine treatment for pediatric chickenpox. Methods We searched RCTs after 2000s from the China National Knowledge Infrastructure (CNKI). Afterwards, the year of publication, demographic information, duration of chickenpox, intervention, treatment duration, outcome measure, results and adverse events were investigated and analyzed for this study. Results 21 RCTs out of 219 studies were collected and analyzed. Although each composition of the herbal medicine was different, they have common ingredients such as 清熱解毒, 散結消腫, 疏散風熱, 涼血解毒, 解表散風 in order to make efficacy of 清熱解毒, 散結消腫, 疏散風熱, 涼血解毒, 解表散風. The oral herbal medicine showed better efficacy and safety to improve clinical symptoms such as total efficacy, cure rate, antipyretic time, antipruritic time, scab time, anti-rash time, hospitalization period and herpes recovery time compared to the western medicine treatment. Conclusions These results show that the oral herbal medicine treatment on chickenpox in children may be more effective in reducing of clinical symptoms compared to the western medicine treatment.

• Journal of the Korean Society for Heat Treatment
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• v.16 no.2
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• pp.71-77
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• 2003

We investigate the phase formation in the compound layer of cast irons during the gaseous nitrocarburising of four different cast irons, that contain different types of graphites in the shape and size. We examine the change in the surface roughness with the nitrocarburising time. The observation of cross-sectional microstructure and X-ray diffraction analysis indicate that the compound layer consists of single ${\varepsilon}-Fe_{2-3}(N,C)$ phase and that its thickness increases in a parabolic manner with the treatment time. The surface roughness parameters, Rz and Ra increase with increasing treatment time. In other words, the roughness parameters increase as the thickness of compound layer increases. The parameters also depend on the shape and size of graphite in the individual cast irons.

• Journal of the Optical Society of Korea
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• v.19 no.3
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• pp.277-283
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• 2015

In this study, we evaluated the muscle tension in hemiplegia patients using a real-time monitoring system combined with high-intensity laser treatment (HILT) device. Five hemiplegia patients were treated with HILT in the left forearm muscle for 8 minutes, and the muscle was relaxed for 8 minutes following the treatment. Both the gradient of the force-displacement curves and the muscle hardness decreased during the therapy, and the effects were maintained following the treatment. The results show that muscle tension decreased rapidly during laser irradiation, and the efficacy of the treatment depended on the duration of the illness. Consequently, we conclude that this combined HILT and real-time muscle tension monitoring system is useful for evaluating the therapeutic procedure and for treatment of muscle pain.