다제내성 그람양성균에 대한 Linezolid(Zyvox^(�))의 시험관내 항균력 비교

박대원,정희진,엄중식,황병연,김성범,이재갑,이연주,정혜원,정성주,박재형,이진수,손장욱,김우주,김민자,박승철 대한감염학회 2003 감염과 화학요법 Vol.35 No.5

배경 : MRSA, VRE, VRSA같은 다제 내성 그람 양성균의 등장에 따라 glycopeptide를 대체할 새로운 항생제의 개발이 필요하게 되었고 결과적으로 새로운 항생제인 linezolid라는 항생제가 개발되었다. Linezolid는 이전의 항생제와는 다른 새로운 계열의 oxazolidinone으로 경구 이용률이 우수하다. 원내 및 원외감염의 중요한 원인균이 되고 있는 MRSA, VRE에 대한 적절한 경구용 항균제가 없는 국내에서 폐렴 및 피부 연조직 감염에서 경구용으로 사용해 볼 수 있는 약제이다. 본 연구에서는 고대 구로 병원에서 분리된 MRSA, VRE 등을 대상으로 다른 여러 항균제와 비교한 linezolid의 시험관내 항균력을 조사하고자 하였다. 재료 및 방법 : 연구대상은 1998년 1월부터 2000년 12월까지 본원에서 입원 및 외래를 통하여 피부 연조직 감염증 및 호흡기 감염증, 요로감염증으로 진단된 환자들의 가검물로부터 분리된 MRSA 60균주, VRE 43균주, PRSP 25균주를 액체배지 또는 한천배지 희석법을 통하여 linezolid 및 기타 항균제에 대한 최소발육억제농도를 구하였다. 결과 : 실험에 사용한 S. aureus는 모두 MRSA였고 이들은 linezolid에 대해 MIC_(90) 2㎍/㎖(MIC 범위 1-2㎍/㎖), Enterococcus spp는 모두 VRE로 linezolid의 MIC_(90)은 2㎍/㎖로 MIC 범위는 1-4㎍/㎖였다. 한 개의 균주에서 MIC 4㎍/㎖로 중등도 감수성을 보였으나 MIC breakpoint가 (8㎍/㎖인 내성균주는 없고 모두 감수성을 보였다. S. pneumoniae의 경우 penicillin 내성이었고, linezolid MIC_(90) 1㎍/㎖ (MIC 범위 0.5-1㎍/㎖)로 전부 감수성을 보였다. 결론 : Linezolid는 MRSA를 위시한 VRE, PRSP 등의 다제 내성 그람 양성균에 대하여 우수한 시험관내 항균력을 보임을 알 수 있었다. Background : The emergence of multi-drug resistant Gram-positive cocci, such as MRSA, VRE, and VRSA, necessitated to develop new antibiotics, which could replace the glycopeptide. As a result, a new antibiotics named linezolid was developed. Linezolid is different line of oxazolidinones with a good oral bioavailability, compared to other antibiotics. Since appropriate oral antibiotics are not presently available for MRSA, which is a major cause of nosocomial and community acquired infections, the introduction of linezolid will have favorable effect on treatment of infections such as pneumonia or skin infections. In this study, we investigated the antibiotic effect of linezolid on MRSA and VRE isolated from patients who were treated in Korea University Guro Hospital. Material and Methods : By using broth microdilution and agar dilution method we measured minimum inhibitory concentration (MIC) with sixty S. aureus, forty three Enterococcus spp., and twenty five S. pneumoniae isolates from patients who were diagnosed as skin, soft tissue, respiratory, and urinary infections in Korea University Guro Hospital from January, 1998 to December, 2002. Results : All of S. aureus used in this study were MRSA, and MIG_(90) of linezolid was below 2 ㎍/㎖ (MIC ranged between 1-2 ㎍/㎖). All of Enterococcus spp. were VRE, and had MIG_(90) of 2 ㎍/㎖ (MIC ranged between 1 to 4 ㎍/㎖). One of the VRE showed intermediate susceptibility with MIC of 4 ㎍/㎖. However, none was resistant with MIC breakpoint above 8 ㎍/㎖. All of S. pneumoniae were resistant to penicillin, but they were susceptible to linezolid with MICao of 1 ㎍/㎖(MIC range 0.5-1㎍/㎖). Conclusion : In conclusions, linezolid has an excellent in vitro antibiotic effect on multi-drug resistant Gram-positive cocci, such as MRSA, PRSP, and VRE.

보상형 PID 재어기를 이용한 DC-서보모터의 속도 제어 시뮬레이션

박윤명,장종승,추연규,임영도 東亞大學校 附設 情報通信硏究所 1999 情報通信硏究所論文誌 Vol.7 No.1

본 논문은 Fuzzy Logic Controller를 이용하여 입력을 보상한, 보상형 PID 제어기를 제안한다. 이 제어기를 사용하여 DC-서보모터의 속도제어 특성을 조사하고, 단순 PID 제어기와 비교하여 제안한 제어기의 성능을 평가하였다. 성능 평가 방법은 MATLAB을 이용하여 DC-Servo Motor와 유사한 가상 플랜트를 설정하고, 부하 및 무부하시의 보상형 PID제어기와 단순 PID 제어기의 속도제어 성능을 모의 실험하였다. 모의 실험 결과 보상형 PID 제어기의 성능이 더 우수한 것으로 나타났다.

스포츠 전문기록원에 관한 교육 프로그램의 필요성

박장근,이원희,최연숙 명지대학교 예체능연구소 2001 藝體能論集 Vol.12 No.-

At the sametime Specialization of Sports recorder, Education program was developed and continued for maintain of specialization and expansion one. For this object, To acquire the following a conclusion 1. To be necessary a course of education for engaging sport recorder 2. A course of study of college to special study for sports recording and decomposition being established. 3. To be necessary development of recording paper for recording management. 4. To various analyze and To build database of recording of game must offer consistent information 5. Korea, for maintain a strong state of sports, Scientifically sports recording, Accurate database of recording, Training specialist, Systematic study. So Sport society and Gorvenment must support this one. Base of this conclusion, special education and management for sports recorder with obligation and duty, being foundation for scientifically and systematic expansion.

골격근 근형질세망의 ATPase활성도에 대한 Vanillylnonanamide의 영향

박경섭,홍장희,류영수,성지연,허강민,임종호,이재흔,석정호 충남대학교 의과대학 지역사회의학연구소 1999 충남의대잡지 Vol.26 No.2

To investigate the effect of vanillylnonanamide(VN) on the ATPase activity of the sarcoplasmic reticulum(SR) of the skeletal muscle, we prepared the SR vesicles from the back muscle of the rabbit, and measured ATPase activity. The results as follows: Ca-ATPase activity was about 50% in the total ATPase activity of skeletal muscular SR. In the reaction mixture with calcium, 100μM VN increased ATPase activity to 20%, and 100 nM and 10 μM thapsigargin(THP) inhibited the ATPase activity to 50% and 60%, respectively. And 100 μM VN plus 100 nM or 10 μM THP more inhibited ATPase activity than THP alone did it. However, without calcium, 100μM VN did not affect ATPase activity, and 10 μM THP inhibited it to 41%, but VN plus THP inhibited it to 31%. The above results show that VN in the reaction mixture with or without calcium has the different action to ATPase activity when it is used alone or together with Ca-ATPase inhibitor THP. This suggests that VN might increase or decrease the skeletal SR Ca-ATPase activity through affecting the lipid membrane around the Ca-ATPase.

맹장을 제거한 성계숫닭에 의한 國內産 肉鷄 내장분말의 有效 아미노산 利用率

李乙衍,金炯浩,車章玉,朴弘錫 全北大學校 1994 論文集 Vol.38 No.-

This study was designed to compare true digestible amino acid values for broiler offal meal with available amino acid values. Broiler offal meal was each force-fed to 6 intact and 6 caecectomised adult cockerels For each test, Cockerels were starved of food for 24 h, fed, and then excreta collected for 48 h. Crude protein, ether extract and ash of broiler offal meal were 50.5%, 16.7%, and 11.7%, respectively. True digestibilities of all seventeen measured amino acids were lower for caecectomised than intact cockerels, with the average difference being approximately 0. 10. True available amino acid of broiler offa meal was higher values for cystine and aspartic acid in intact than in caecetomised cockerels. Generally leucine, isoleucine and glutamic-acid were among the most available amino acids, while cystine, aspartic acid and threonine were among the least available amino acids in broiler offal meal for caecectomised cockerels.

한우 체외수정란의 동결보존 및 핵이식에 관한 연구 : Ⅱ. 체외수저란의 동결방법이 동결.융해후 생존율에 미치는 영향 Ⅱ. Effects of Survival Rates of Frozen-Thawed Embryo Frozen Methods

정장용,박희성,홍승표,김정혁,桑潤滋,離素娟 진주산업대학교 농업기술연구소 1999 農業技術硏究所報 Vol.12 No.-

본 연구는 수정란의 동결기법을 확립하고자 배반포기에 있는 한우 체외수정란을 이용하여 유리화 및 직접이식 동결방법으로 동결을 실시하여 동결·융해후 생존성, 동해방지제의 종류, 평형 및 할구의 손상여부 등에 대한 영향을 조사한 결과는 다음과 같다. 유리화 동결방법중 GESD-VS와 EFS 용액을 동해방지제로 사용하였을 때 동결·융해 수정란의 생존율은 각각 69.8 및 37.3%로써 이들간에 유의적(P<0.05)인 차이가 있었으며, 동결기를 이용한 직접이식 동결법은 생존율이 56.0%로써 유리화 동결방법과는 유의적(P<0.05)인 차이가 없었다. 동결·융해후 생존한 수정란의 발달율은 GESD-VS용액을 사용하였을때가 53.4%로써 EFS용액을 사용하였을때의 24.0%보다는 유의적(P<0.05)으로 높게 나타났다. 1 및 2단계 평형시 단계별 생존율은 각각 11.7 및 23%로써 이들간에 유의적(P<0.05)인 차이가 없었으며, 동결·융해 수정란의 발달율도 각각 10 및 16.8%로써 평형방법간에 유의적(P<0.05)인 차이가 없었다. 신선수정란, 유리화 동결수정란 및 동결비를 이용한 직접이식 동결법으로 동결하였을 때 동결·융해 수정란의 할구수는 각각 98.7±2.3개, 69.1±2.6 및 84.2±2.7개로써 동결방법들간에 유의적(P<0.05)으로 할구수의 차이가 많았다. This study was carried out to investigate the effect of cryoprotectants, equilibration step, number of blastomeres on survival and developmental rates of bovine in vitro fertilized blastocysts(Korean native cattle) frozen/thawed by vitrification and frozen for direct transfer(1.8M ethylene glycol). The bovine oocytes were collected from 2-5mm follicles, matured for 24hrs in 5% CO_2 incubator and then fertilized with cauda epididymis sperm. Blastocyst at day 7-9 ater IVF were frozen in vitrification and frozen for direct transfer(1.8M ethylene glycol). Survival and developmental rates of frozen-thawed IVF embryos were examined. The results were as follow ; The survival rate of IVF blastocyst after vitrification in GESD-VS, EFS and 1.8M ethylene glycol solution were 69.8, 37.3 and 56.0%, respectively(P<0.05). When equilibrated in 1 step(11.7%) was similar to the result from 2 step(23.0%), and no significantly(P<0.05) different between the equilibrated steps. The number of blastomere at blastomere at blastocyst of bovine embryos frozen/thawed in fresh, vitrification and freezing for direct transfer were 98.7±2.3, 69.1±2.6 and 84.2±2.7, respectively, and were significantly(P<0.05) different between the freezing methods.

한우 체외수정란의 동결보존 및 핵이식에 관한 연구 : Ⅲ. 융합조건 및 공핵란의 발달단계가 핵이식 수정란의 체외발달에 미치는 영향 Ⅲ. Effects of Fusion System and Developmental Stage of Donor Nuclei on In Vitro Development by NT of Bovine Embryos

정장용,박희성,桑潤滋,離泰娟 진주산업대학교 농업기술연구소 2000 農業技術硏究所報 Vol.13 No.-

The present study was conducted to improve the efficiency of nuclear transplantation with in vitro produced oocytes and embryos in Korean native cows. The optimal conditions and procedures of in vitro maturation(IVM), in vitro fertilization(IVF), in vitro culture(IVC), electrofusion and nuclear transplantation(NT) of bovine oocytes were evaluated. The optimal condition for electric fusion of injected blastomeres with enucleated oocytes was determined following NT in IVM oocytes. The higher fusion rate was achieved when single DC electricity was applied at the voltage between 1.0kV/cm, for the duration of 30∼60 μ sec to the oocytes aged at 28∼32 hours of IVM. The development in vitro to blastocyst of the fused embryos of 30 μsec, 0.5-1.0 kV/cm(5.7-4.2%) was similar to the result from the 60 μsec, 0.5-1.0ikV/cm(4.8-5.6%), and not significantly different between the electric fields. To improve the productivity of cloned embryos by NT in Korean native cows. The in vitro developmental rate of donor nuclei following NT and fusion was enhanced from 4.6%(8∼6-cell) and 2.7%(32∼64-cell). The number of blastomeres was significantly(P<0.05)reduced in the nuclear transplanted embryos(65.3±4.7), compared with the IVF embryos(112.8±6.2).

유지-이완기법과 냉치료가 지연성 근육통에 미치는 효과

김종만,박장성,김원호,신헌석,김연중 한국전문물리치료학회 2000 한국전문물리치료학회지 Vol.7 No.1

Despite research to treat delayed onse muscle soreness(DOMS), no effective treatment has been reported. The purpose of this study is to investigate the effect of a hold-relax technique and cryotherapy on DOMS. Thirty-three subjects were randomly assigned to one of three treatment groups: control, hold-relax technique, or hold-relax technique and cryotherapy. DOMS was induced in the non-dominant biceps muscle through repeated eccentric contractions. Resting elbow joint position, flexion and extension(universal goniometer), pain(Visual Analogue Scale; VAS), and WBC count(blood analysis) were measured one hour before DOMS was induced and 24, 48, and 72 hours after DOMS was induced. The data were analyzed by repeated measure of two-way ANOVA. The results of this study were summarized as follows: 1) While analysis showed no significant differences between groups in relation to resting elbow joint position, there were significant differences over time, especially at 24, 48 hours after DOMS was induced compared with resting elbow joint position before DOMS was induced. 2) While analysis showed no significant differences between groups in relation to range of flexion, there were significant differences between rage of flexion before DOMS was induced and range of flexion 72 hours after DOMS was induced. 2) There were no significant differences between groups or over time in relation to range of extension. 4) While analysis showed no significant differences between groups in relation to VAS, there were significant differences over time in different hours. 5) There were no significant differences between groups or over time in relation to WBC count. 6) There were no interactions between groups or over time in all variables. This results suggested that hold-relax technique and cryotherapy were not effective to reduce DOMS.

서울 강서지역 1개 대학병원에서 성인 급성 신우신염의 원인균과 항생제 감수성

황병연,이재갑,박대원,이연주,김성범,엄중식,손장욱,정희진,김우주,김민자,박승철 대한감염학회 2003 감염과 화학요법 Vol.35 No.5

목적 : 3년간 서울시 강서지역의 1개 대학병원에서 입원치료를 받은 성인 급성 신우신염 환자를 대상으로 원인균과 항생제 감수성을 조사하고, 향후 급성 신우신염의 초기 경험적 치료 항생제를 제안하고자 하였다. 방법 : 1999년 1월부터 2001년 12월까지 3년간 고려대학교 의과대학 구로병원에 상부요로감염으로 내원한 16세 이상 환자 229명의 의무 기록을 검토를 통하여, 인구학적 특성, 원인균, 항생제 감수성, 초기 항생제 사용 양상과 입원기간을 조사하였다. 결과 : 연구에 포함된 229명을 118명의 단순 신우신염군과 111명의 복잡 신우신염군으로 구분 하였다. 단수 신우신염의 평균 발생 연령은 38.2세와 복잡 신우신염 56.1세로 복잡 신우신염 환자의 연령이 유의하게 높았다(P<0.001). 양군 모두에서 원인균 중 E. coli의 분리율이 가장 높았으며 항생제 감수성 결과 ampicillin, trimethoprim-sulfame-thoxazole에는 높은 내성률을 보였고, ciprofloxacin, gentamicin, cefotaxime에 대한 감수성은 비교적 높았으나 복잡 신우신염의 경우 단순 신우신염에 비하여 ciprofloxacin, gentamicin에 대한 감수성이 다소 낮은 것을 확인할 수 있었다. 평균 입원 기간, 항생제 투여 기간에 있어서도 복잡 신우신염군에서 유의하게 길었다. 결과 : 본 연구의 결과 서울의 강서 지역에서 대학병원급에 치료 의뢰되는 단순 급성 신우신염의 치료에 있어 1차 항생제로 3세대 cephalosporin, aminoglycoside, quinolone 중 한가지를 초기 경험적 치료제로 사용을 고려하여야 할 것으로 사료된다. Background : The purpose of this study is to recommend the initial therapeutic regimen for adult patients with acute pyelonephritis (APN) according to the changes of antimicrobial susceptibility patterns of causative microorganisms isolated from patients with APN. Methods : We reviewed medical charts of 229 APN patients, who had been treated at Korea University Guro Hospital from 1st of January. 1999 to 31st of December, 2001. We investigated the demographic data, clinical findings, durations of hospital treatment, antimicrobial susceptibility patterns of the causative microorganisms and initial antibiotic regimens in patients with APN. Results : In this study, 229 adult patients with APN were classified into simple APN patients (118 patients, 51.5%) and complicated APN patients (111 patients, 48.4%). Mean age of patients with simple APN was 38.2±14.1 years old and that of patients with complicated APN was 56.1±14.9 years old. Mean age of patients with complicated APN was significantly higher than that of simple APN patients (P<0.0001). Escherichia coli was the most common microorganism both in simple APN (96.7%) group and in complicated APN (90.6%) group. Antimicrobial susceptibility of E. coli was at the low level of ampicillin (31%/20%) and trimethoprim-sulfamethoxazole (42.6%/34.2%) in each group. In contrast, ciprofloxacin (11.5%/22.7%), gentamicin (16.4%/22%) and cefotaxime (0%/8.2%) resistance remained at relatively lower level. In comparison of simple APN with complicated APN, ciprofloxacin and gentamicin resistances were higher in complicted APN group. Average duration of hospitalization (5.9±2.3 days/8.2±4.6 days) and duration of antibiotic use (12.1±3.9 days/15.3±10.0 days) were significantly longer in complicated APN. Conclusions: The results of this study suggests that 3rd cephalosporin, aminoglycoside or quinolone antibiotic would considered as one of the initial therapeutic regimen for patients with simple APN in southwestern Seoul.

노년기 치매와 우울증의 유병률 및 위험인자

서국희,김장규,연병길,박수경,유근영,양병국,김용식,조맹제 大韓神經精神醫學會 2000 신경정신의학 Vol.39 No.5

경기도 연천군에 거주하는 만 65세이상 노인 1,037명을 대상으로 1996년 12월부터 1997년 8월까지 9개월간에 걸쳐 치매와 노년기 우울장애의 유병률과 위험인자에 관한 이 단계 역학조사(일차선별검사후 이차 진단적 면접)를 수행하였다. 다단계 층화집락표본추출에 의한 확률표본법으로 대상자 선정을 하였고, 반응률은 85.2%이 었다. 일차선별검사에는 노인정신장애 평가척도 한국어판(K-PAS)을 사용하였고, 일상생활 능력척도(ADL) 및 수단적 일상생활 능력척도(IADL)를 사용하여 기능을 평가했고, 지지도 척도(APGAR)를 사용하여 사회적 지지정도를 평가하였다. 이차 진단적 면접에서는 진 신장애의 진단 및 통계편람 제3판 개정판(DSM-III-R)의 진단기준을 따라 임상 진단을 확정하였다. 감별진단 및 장애 정도의 평가를 위하여 보조적인 진단도구들을 사용하였다. 1) 연령 보정된 치매의 유병률(%)[95% 신뢰구간]은 6.83[6.12∼7.54](남자 6.34[5.29∼7.40], 여자7.09[6.14∼8.04]이었다. 이중 알쯔하이머형 치매의 유병률(%)[95% 신뢰구간]은 4.17[3.61∼4.74] (남자 2.42[1.76∼3.08], 여자 5.31[4.48∼6.14]이었고, 혈관성치매의 유별률(%)[95% 신뢰구간]은2.38[1.95∼2.81](남자 3.46[2.67∼4.25], 여자 1.63[1.16∼2.10])이었다. 2) 연령 보정된 우울장애의 유병률(%)[95% 신뢰구간]은 10.99[10.11∼11.87](남자 7.59[6.44∼8.73], 여자 13.46[12.20∼14.73])이었다. 진단별로는 주요 우울장애의 유병률(%)[95% 신뢰구간] 이 7.50[6.76∼8.26](남자 4.42[3.54∼5.31], 여자 9.78[8.68∼10.88]), 기분부전장애의 유병률(%)[95% 신뢰구간]이 2.02[1.62∼2.42](남자 1.37[0.86∼1.87], 여자 2.46[1.88∼3.03], 달리 특정되지 않은 우울장애 유병률 (%)[95% 신뢰구간]이 1.49[1.15∼1.83](남자 1.85[1.47∼2.23], 여자 1.28[0.96∼1.60])이었다. 3) 알쯔하이머형 치매의 통계적으로 유의한 5가지 위험인자는 85셍상의 고령(O.R.= 10.27), 무학(O.R.= 4.01), 흡연[흡연년수 0.1∼30년(O.R.= 3.11), 흡연년수 30년 이상 (O.R.= 4.60)], 알코올남용(O.R.= 2.98)과 치매의 가족력 (O.R.= 4.85)이었다. 4) 혈관성 치매의 통계적으로 유의한 3가지 위험인자는 '무학' (O.R.= 3.78), 흡연[40년 이상 흡연년수 (O.R.= 11.15)]과 '뇌졸중의 과거력 (O.R.= 26.76)'이었다. 5) 우울장애의 통계적으로 유의한 3가지 위험인자는 '75∼79세 연령군' (O.R.= 2.87), '뇌졸중의 과거력' (O.R.= 3.33)과 '우울장애의 가족력' (O.R.= 7.16)이었다. 중심단어:알쯔하이머형 치매·혈관성 치매·우울장애·유병률·위험인자·흡연. An epidemiological survey was conducted to estimate the prevalence of and identify the risk factors of dementia and depression in the elderly between December 1997 and August 1998 in Yonchon County, Korea. A total of 1,037 elderly aged 65 years and over underwent a two phase diagnocstc procedure. Multiple stage, random cluster sampling method was used to select the subjects. Response rate was 85.4%. For the Ist stage screening survey, the Korean Psych-ogeriatric Assessment Scale was used as a primary screening tool, which had already been standardized in Korea, and functioning and social support were assessed by ADL, IADL and APGAR. At the 2nd stage, diagnoses were confirmed according to the DSM-Ⅲ-R. And several other scales were used as supporting information for differential diagnoses and for evaluating severity. 1) Age-sex adjusted prevalence(%)[95% C.I] of dementia was 6.83[6.12-7.54](male 6.34 [5.29-7.40], female 7.09[6.14-8.04]). Prevalence of the dementia of the Alzheimer's type was 4.17[3.61-4.74](male 2.42[1.76-3.08], female 5.31[4.48-6.14]) and that of the va-scular dementia was 2.38[1.95-2.81](male 3.46[2.67-4.25],female 1.63[1.16-2.10]). 2) Age-sex adjusted prevalence(%)[95% C.I.] of depressive disorder was 10.99[10.11-11.87](male 7.59[6.44-8.73], female 1346[12.20-14.73]. Among depressive disorders, prev-alence(%)[95% C.I.] of major depressive disorder was 7.50[6.76-8.26](male 4.42[3.54-5.31], female 9.78[8.68-10.88]), that of dysthymic disorder was 2.02[1.62-2.42](male 1.37[0.86-1.87], female 2.46[1.88-3.03]) and that of depressive disorder NOS was 1.49[1.15-1.83](male 1.85[1.47-2.23], female 1.28[0.96-1.60]). 3) Five statistically significant risk factors of the dementia of the Alzheimer's type were identified : age over 85(O.R. = 10.27), illiteracy (O.R. = 4.01), alcohol abuse (O.R. = 2.98), smoking [0 < pack year ≤30(O.R. = 3.11), pack year>30(O.R. = 4.60)] and family history of dementia (O.R. = 4.85). 4) Three statistically significant risk factors of the vascular dementia were identified : illiteracy (O.R. = 3.78), history of CVA(O.R. = 26.76) and smoking over 40 pack year(O.R. = 11.15). 5) Three statistically significant risk factors of the depressive disorder were identifed : age between 75 and 79(O.R. = 2.87), past history of CVA(O.R. = 3.33) and family history of depressive disorder(O.R. = 7.16). KEY WORDS:Dementia of the Alzheimer's Type·Vascular dementia·Depressive disorder·Prevalence·Risk factor·Smoking.