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조동혁,박종우 한국IT서비스학회 2015 한국IT서비스학회지 Vol.14 No.3
The spread of mobile commerce due to popularization of smartphones not only broke down the boundary between online and offline, but also changed the consumer life, and hence brought change of commerce paradigm that creates new demand. The success of innovative information technology such as mobile shopping can be defined as an individual accepting the technology and continuously using it, but the studies on the usage behavior after the acceptance have been done in very restrictively, despite its importance. In this study, in order to empirically investigate the factors that influence the continuance in mobile shopping usage experience and its causal relationship, Social Cognitive Theory and Habit Theory were applied to IS Continuance Model,and the extended IS Continuance Model was suggested and proved. As a result, the usefulness, enjoyment, and self-efficacy perceived in usage experience significantly influence satisfaction, and usefulness, self-efficacy, and satisfaction influence habit. Also, usefulness, self-efficacy, satisfaction, and habit significantly influence continuance intention. This study provides a valuable asset in providing an opportunity to understand the usage behavior of mobile shopping service users after the acceptance, and furthermore proving directionality in improving customer loyalty.
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제2형 당뇨병 환자에서 경동맥 죽상경화증이 사구체여과율의 감소에 미치는 영향
조동혁,정진욱,정동진,정민영 대한내분비학회 2011 Endocrinology and metabolism Vol.26 No.4
Background: Cardiovascular risk is higher among people with diabetic nephropathy than among those with normal renal function. Carotid intima-media thickness (IMT) is an independent predictor of cardiovascular mortality in type 2 diabetic patients. However, the relationship between carotid IMT and diabetic nephropathy is not well known. The aim of our study was to elucidate whether carotid IMT is associated with progression of diabetic nephropathy in type 2 diabetic patients. Methods: We recruited a total of 354 type 2 diabetic patients with diabetic nephropathy. Renal function was evaluated by serum creatinine levels, estimated glomerular filtration rate (eGFR), and urinary albumin/creatinine ratio (ACR). Carotid IMT was assessed using B-mode ultrasound by measuring generally used parameters. Baseline-to-study end changes in eGFR were calculated,and the yearly change of eGFR (mL/min/yr) was computed. Results: Age, diabetes duration, ACR, and eGFR were significantly correlated with mean or maximal carotid IMT; however, lipid profiles, HbA1c, and blood pressure were not correlated. The mean yearly eGFR change was -4.9 ± 5.3 mL/min/yr. The yearly eGFR change was negatively correlated with mean and maximal carotid IMT. After adjusting for age and diabetes duration, the mean IMT is an independent predictor of yearly eGFR change. Conclusion: Carotid IMT may be a predictor of diabetic nephropathy progression in patients with type 2 diabetes.
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하추체정맥동 채혈검사 후 발생한 Raymond-Cestan 증후군 1예
조동혁 대한내분비학회 2003 Endocrinology and metabolism Vol.18 No.1
Inferior petrosal sinus sampling (IPSS) plays an important role in the assessment of patients with ACTH-dependent Cushing's syndrome. IPSS has been described as an innocuous, essentially risk-free procedure. Neurological complications associated with IPSS are rare. Previously reported neurological complications include brain stem infraction, pontine hemorrhage and subarachnoid hemorrhage.A 26-year-old woman was admitted to the hospital because of a moon face and a buffalo hump. A MRI showed a suspicious, but uncertain, area on the left side of the sella turcica. IPSS was performed as an appropriate means of providing more information about the side of the ACTH source. Immediately after the procedure, the woman experienced double vision, caused by a complete sixth nerve palsy of the left eye, together with a contralateral hemiparesis. From a clinical point of view, abducens nerve palsy and contralateral hemiparesis corresponded to Raymond-Cestan syndrome. I report a case of Raymond-Cestan syndrome, following petrosal sinus sampling in a female patient with ACTH-dependent Cushing's syndrome. To the best of our knowledge, this complication associated with petrosal sinus sampling has only been described in one previous case report. Although IPSS may provide essential information in the investigation of Cushing's syndrome, the possibility of very occasional but devastating complications should be remembered(J Kor Soc Endocrinol 18:73~78, 2003). 저자는 4년 전에 하추체정맥동채혈검사 등을 시행하여 쿠싱병으로 진단받고 종양제거 후에 완치 판정을 받아 외래추적관찰 중이던 26세 여자에서 재발한 ACTH 의존성 쿠싱증후군의 원인적 감별 진단을 위하여 하추체정맥동채혈검사 후에 좌안의 외전신경마비와 우측부전마비가 발생하여 Raymond-Cestan 증후군으로 진단하고 항응고요법 등의 치료 후에 호전된 1예를 경험하였기에 문헌고찰과 함께 보고하는 바이다.
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