Abstract:
OBJECTIVE:To use information from genetic polymorphisms and from patients (drinking/exercise habits) to identify their association with stone disease, the main analytical and predictive tools being discriminant analysis (DA) and artificial neural networks (ANNs). PATIENTS, SUBJECTS AND METHODS:Urinary stone disease is common in Taiwan; the formation of calcium oxalate stone is reportedly associated with genetic polymorphisms but there are many of these. Genotyping requires many individuals and markers because of the complexity of gene-gene and gene-environmental factor interactions. With the development of artificial intelligence, data-mining tools like ANNs can be used to derive more from patient data in predicting disease. Thus we compared 151 patients with calcium oxalate stones and 105 healthy controls for the presence of four genetic polymorphisms; cytochrome p450c17, E-cadherin, urokinase and vascular endothelial growth factor (VEGF). Information about environmental factors, e.g. water, milk and coffee consumption, and outdoor activities, was also collected. Stepwise DA and ANNs were used as classification methods to obtain an effective discriminant model. RESULTS:With only the genetic variables, DA successfully classified 64% of the participants, but when all related factors (gene and environmental factors) were considered simultaneously, stepwise DA was successful in classifying 74%. The results for DA were best when six variables (sex, VEGF, stone number, coffee, milk, outdoor activities), found by iterative selection, were used. The ANN successfully classified 89% of participants and was better than DA when considering all factors in the model. A sensitivity analysis of the input parameters for ANN was conducted after the ANN program was trained; the most important inputs affecting stone disease were genetic (VEGF), while the second and third were water and milk consumption. CONCLUSIONS:While data-mining tools such as DA and ANN both provide accurate results for assessing genetic markers of calcium stone disease, the ANN provides a better prediction than the DA, especially when considering all (genetic and environmental) related factors simultaneously. This model provides a new way to study stone disease in combination with genetic polymorphisms and environmental factors.
journal_name
BJU Intjournal_title
BJU internationalauthors
Chiang D,Chiang HC,Chen WC,Tsai FJdoi
10.1046/j.1464-410x.2003.03067.xkeywords:
subject
Has Abstractpub_date
2003-05-01 00:00:00pages
661-6issue
7eissn
1464-4096issn
1464-410Xpii
3067journal_volume
91pub_type
临床试验,杂志文章abstract:OBJECTIVE:To test whether salvage radiotherapy (SRT) in patients with lymph node negative (N0) prostate cancer is equally effective with persistent prostate-specific antigen (PSA) and PSA rising from the undetectable range (<0.1 ng/mL) after radical prostatectomy (RP). PATIENTS AND METHODS:We assessed post-SRT PSA pro...
journal_title:BJU international
pub_type: 杂志文章
doi:10.1111/bju.14851
更新日期:2019-11-01 00:00:00
abstract:OBJECTIVE:To determine the prevalence, type and treatment behaviour of women with urinary incontinence in four European countries. SUBJECTS AND METHODS:Data were collected using a postal survey which was sent to 29,500 community-dwelling women aged > or = 18 years in France, Germany, Spain and the UK. Subjects were as...
journal_title:BJU international
pub_type: 杂志文章,多中心研究
doi:10.1111/j.1464-410x.2003.04609.x
更新日期:2004-02-01 00:00:00
abstract:OBJECTIVE:To characterize serial long-term histological changes in mesenchymal cells infiltrating a collagen-based matrix, as in a hollow organ with differentiated urothelial lining created intraperitoneally by grafting cultured urothelial cells, mesenchymal cells with smooth-muscle immunohistochemical characteristics ...
journal_title:BJU international
pub_type: 杂志文章
doi:10.1111/j.1464-410X.2005.05586.x
更新日期:2005-07-01 00:00:00
abstract:OBJECTIVES:To analyze pathological and short-term oncological outcomes in men undergoing open and minimally-invasive radical prostatectomy (MIRP) for high-risk prostate cancer (HRPC; prostate-specific antigen level [PSA] >20 ng/mL, ≥ cT2c, Gleason score 8-10) in a contemporaneous series. PATIENTS AND METHODS:In total,...
journal_title:BJU international
pub_type: 杂志文章
doi:10.1111/j.1464-410X.2012.11757.x
更新日期:2013-10-01 00:00:00
abstract:OBJECTIVE:•To evaluate the natural history of patients presenting with positive urinary cytology in the absence of clinically identifiable disease. PATIENTS AND METHODS:•A surgical database was queried to identify 48 patients with positive urinary cytology of undetermined source. •All patients underwent a thorough uro...
journal_title:BJU international
pub_type: 杂志文章
doi:10.1111/j.1464-410X.2011.10210.x
更新日期:2011-10-01 00:00:00
abstract:OBJECTIVE:To identify predictors for long-term urinary leakage after radical prostatectomy. PATIENTS AND METHODS:A consecutive series of 1411 patients who underwent radical prostatectomy (open surgery or robot-assisted laparoscopic surgery) at Karolinska University Hospital between 2002 and 2006 were invited to comple...
journal_title:BJU international
pub_type: 杂志文章
doi:10.1111/j.1464-410X.2011.10231.x
更新日期:2011-11-01 00:00:00
abstract:OBJECTIVE:To assess whether baseline health-related quality of life (HRQOL) and psychosocial profiles differ in patients with prostate cancer scheduled for radical prostatectomy (RP) or external radiation therapy (ERT), as there is evidence that HRQOL is influenced by psychosocial factors (PFs), so that any variation a...
journal_title:BJU international
pub_type: 杂志文章
doi:10.1046/j.1464-410x.2003.04321.x
更新日期:2003-08-01 00:00:00
abstract:OBJECTIVE:To test the hypothesis that bladder cancer is a heterogeneous disease. PATIENTS AND METHODS:We examined the temporal trends of bladder cancer by histological subtype and by disease stage and grade using the National Cancer Institute's Surveillance, Epidemiology, and End Results data collected in 1973-2007. ...
journal_title:BJU international
pub_type: 杂志文章
doi:10.1111/j.1464-410X.2011.10283.x
更新日期:2012-01-01 00:00:00
abstract:OBJECTIVE:To critically review published data on the urogynaecological aspects of female sexual dysfunction (FSD), as FSD is a developing multidisciplinary issue associated with several biological, medical and psychological factors. METHODS:The reported prevalence of FSD is 19-50% and women with lower urinary tract sy...
journal_title:BJU international
pub_type: 杂志文章,评审
doi:10.1111/j.1464-410X.2007.07442.x
更新日期:2008-03-01 00:00:00
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journal_title:BJU international
pub_type: 杂志文章,评审
doi:10.1111/j.1464-410X.2011.10123.x
更新日期:2011-06-01 00:00:00
abstract::The aim of revalidation (or maintenance of certification) is to reassure patients, the general public, employers and other healthcare professionals that an individual is fit to practice. It may lead to a reduction in near misses or adverse events. The process of revalidation entails a commitment to the provision of li...
journal_title:BJU international
pub_type: 杂志文章,评审
doi:10.1111/j.1464-410X.2011.10375.x
更新日期:2011-10-01 00:00:00
abstract:OBJECTIVE:To investigate the effect on cancer detection by varying the number of cores taken for prostate biopsy according to the size of the prostate. PATIENTS AND METHODS:A retrospective review of a prospectively registered prostate biopsy database identified 3040 consecutive patients undergoing prostate biopsy at a...
journal_title:BJU international
pub_type: 杂志文章
doi:10.1111/j.1464-410X.2011.10239.x
更新日期:2011-11-01 00:00:00
abstract:OBJECTIVE:To investigate the pharmacological effects of ethanol and its metabolite acetaldehyde on isolated rat bladder muscle, and thus assess the potential influence of ethanol ingestion on the risk of urinary retention in patients with benign prostatic hyperplasia. MATERIALS AND METHODS:Isometric tension changes of...
journal_title:BJU international
pub_type: 杂志文章
doi:10.1046/j.1464-410x.1999.00968.x
更新日期:1999-04-01 00:00:00
abstract::• Synthetic mid-urethral slings (MUSs) are considered the first choice surgical procedure for stress urinary incontinence. Recent publications have raised concerns about the efficacy of third generation single-incision mini-slings. The present paper is a systematic review of studies reporting 12-month outcomes after t...
journal_title:BJU international
pub_type: 杂志文章,评审
doi:10.1111/j.1464-410X.2011.10333.x
更新日期:2011-09-01 00:00:00
abstract:OBJECTIVE:To evaluate the reliability and validity of the Premature Ejaculation Profile (PEP), a self-reported outcome instrument for evaluating domains of PE and its treatment, comprised of four single-item measures, a profile, and an index score. SUBJECTS AND METHODS:Data were from men participating in observational...
journal_title:BJU international
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1111/j.1464-410X.2008.08041.x
更新日期:2009-02-01 00:00:00
abstract:OBJECTIVE:To examine, in a retrospective analysis of outcome based on prostate-specific antigen (PSA) levels, whether the 1992 and revised 1997 staging criteria for prostate cancer can be used to predict progression-free survival for patients after radical prostatectomy for pT2 and pT3 prostate cancer. PATIENTS AND ME...
journal_title:BJU international
pub_type: 杂志文章
doi:10.1046/j.1464-4096.2001.02420.x
更新日期:2001-11-01 00:00:00
abstract:OBJECTIVE:To compare outcomes of minimally invasive radical nephrectomy (MIS-RN) and robot-assisted partial nephrectomy (RAPN) in clinical T2a renal mass (cT2aRM). PATIENTS AND METHODS:Retrospective, multicentre, propensity score-matched (PSM) comparison of RAPN and MIS-RN for cT2aRM (T2aN0M0). Cohorts were PSM for ag...
journal_title:BJU international
pub_type: 杂志文章,多中心研究
doi:10.1111/bju.15064
更新日期:2020-07-01 00:00:00
abstract:OBJECTIVE:•To determine the optimal treatment for incidentally detected small renal masses between radical nephrectomy, partial nephrectomy, ablative therapy (AT) and active surveillance (AS) using a decision-analytic Markov model. SUBJECTS AND METHODS:•The reference case was an otherwise healthy 60-year-old patient. ...
journal_title:BJU international
pub_type: 杂志文章
doi:10.1111/j.1464-410X.2011.10115.x
更新日期:2011-10-01 00:00:00
abstract:UNLABELLED:WHAT'S KNOWN ON THE SUBJECT? AND WHAT DOES THE STUDY ADD?: Prostate cancer has three known clinical risk factors: age, ethnicity and family history. Men's knowledge of prostate cancer is low. This study demonstrates that men rely on family and friends to learn about prostate cancer and help them interpret th...
journal_title:BJU international
pub_type: 杂志文章
doi:10.1111/j.1464-410X.2012.11316.x
更新日期:2013-03-01 00:00:00
abstract:OBJECTIVES:To validate a flexible cystoscopy simulator by determining if it could differentiate between expert and novice cystoscopists. SUBJECTS AND METHODS:Seventeen subjects (10 novices with no previous endoscopic experience and seven urologists who had all carried out > 1000 flexible cystoscopies each) were asked ...
journal_title:BJU international
pub_type: 杂志文章
doi:10.1046/j.1464-410x.2002.03090.x
更新日期:2002-12-01 00:00:00
abstract:OBJECTIVES:To present our initial operative experience in which single-port-light endoscopic robot-assisted reconstructive and extirpative urological surgery was performed by one surgeon, using a pig model. MATERIALS AND METHODS:This pilot study was conducted in male farm pigs to determine the feasibility and safety o...
journal_title:BJU international
pub_type: 杂志文章
doi:10.1111/j.1464-410X.2009.08955.x
更新日期:2010-03-01 00:00:00
abstract:OBJECTIVE:To examine the utility of cyanoacrylate tissue adhesive (Dermabond, Ethicon, Somerville, NJ, USA; an effective means of epithelial skin closure) under a diaper (i.e. constantly exposed to bodily fluids) in 25 children (not toilet-trained) undergoing inguinal surgery. PATIENTS AND METHODS:A retrospective revi...
journal_title:BJU international
pub_type: 杂志文章
doi:10.1046/j.1464-410x.2001.02142.x
更新日期:2001-05-01 00:00:00
abstract:OBJECTIVE:To report on the failure of thalidomide to inhibit tumour growth in an animal model of human renal cell carcinoma (RCC). MATERIALS AND METHODS:An orthotopic xenograft model of human RCC was used in which tumour cells were implanted in the left kidney of male 'severe combined immunodeficient' mice. Thalidomid...
journal_title:BJU international
pub_type: 杂志文章
doi:10.1046/j.1464-410x.2002.02666.x
更新日期:2002-04-01 00:00:00
abstract:OBJECTIVE:To determine the outcomes of open ureterolysis in a contemporary cohort of patients presenting with ureteric obstruction secondary to retroperitoneal fibrosis (RPF). PATIENTS AND METHODS:We conducted a prospective analysis of 50 patients undergoing open ureterolysis and omental wrap between January 2012 and ...
journal_title:BJU international
pub_type: 杂志文章
doi:10.1111/bju.13915
更新日期:2017-10-01 00:00:00
abstract:OBJECTIVES:• To investigate a new method of vas deferens radiography for ejaculatory duct obstruction (EDO). • To evaluate the effect of a procedure involving dilation of the ejaculatory duct by F9 seminal vesicoscopy. PATIENTS AND METHODS:• Twenty-two patients with EDO were diagnosed using semen analysis, semen fruct...
journal_title:BJU international
pub_type: 杂志文章
doi:10.1111/j.1464-410X.2010.09775.x
更新日期:2011-07-01 00:00:00
abstract:OBJECTIVE:To examine the tissue expression of DNA topoisomerase I (Topo I) and IIalpha (Topo II), to pursue the possibility of future chemotherapy regimens for squamous cell carcinoma of the penis (SCCP), as high expression of Topo I might indicate sensitivity to the camptothecins, whereas high Topo II might indicate s...
journal_title:BJU international
pub_type: 杂志文章
doi:10.1111/j.1464-410X.2008.07698.x
更新日期:2008-09-01 00:00:00
abstract:OBJECTIVE:To report the outcomes of >1000 men with low-risk prostate cancer treated with low-dose-rate (LDR) brachytherapy at three large UK cancer centres. PATIENTS AND METHODS:A total of 1038 patients with low-risk prostate cancer (prostate-specific antigen [PSA] ≤10 ng/mL, Gleason score 6, ≤T2b disease) were treate...
journal_title:BJU international
pub_type: 杂志文章,多中心研究
doi:10.1111/bju.12358
更新日期:2014-05-01 00:00:00
abstract:OBJECTIVE:We evaluated the current evidence for the use of acupuncture to treat erectile dysfunction (ED). METHODS:Systematic searches were conducted in 15 electronic databases, with no language restrictions. Hand-searches included conference proceedings and our files. All clinical studies of acupuncture as a treatmen...
journal_title:BJU international
pub_type: 杂志文章,meta分析,评审
doi:10.1111/j.1464-410X.2009.08422.x
更新日期:2009-08-01 00:00:00
abstract:OBJECTIVES:To examine the effect of partial urethral obstruction (PUO) on bladder smooth muscle outward potassium current and the contribution of the large-conductance calcium-activated potassium (Maxi-K, BKCa) channel to this activity in smooth muscle cells isolated from bladders of sham-operated and PUO male rats usi...
journal_title:BJU international
pub_type: 杂志文章
doi:10.1111/j.1464-410X.2012.11137.x
更新日期:2012-10-01 00:00:00
abstract:OBJECTIVES:To describe and evaluate the outcomes of a new epididymovasostomy technique. PATIENTS AND METHODS:Nine patients with obstructive azoospermia were treated at the Minia University Hospital using a new microsurgical bilateral epididymovasostomy technique. The technique involved the opening of a small window in...
journal_title:BJU international
pub_type: 杂志文章
doi:10.1111/bju.12839
更新日期:2015-04-01 00:00:00