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C S Loh

Publications and source records attributed to C S Loh.

At least 19 recordsLinked to original sources
PubMed2004

Reliability and validity of the Spielberger State-Trait Anxiety Inventory (STAI) among urological patients: a Malaysian study.

To validate the English version of the Spielberger State-Trait Anxiety Inventory (STAI) in a sample of Malaysia patients with and without urinary symptoms. Validity and reliability were studied in patients with lower urinary tract symptoms (LUTS) and patients without LUTS. Reliability was evaluated using the test-retest method and internal consistency was assessed using Cronbach's alpha. Sensitivity to change was expressed as the effect size in the pre-intervention versus post-intervention score in additional patients with LUTS who underwent transurethral resection of the prostate (TURP). Internal consistency was excellent. A high degree of internal consistency was observed for each of the 40 items with Cronbach's alpha value = 0.38 to 0.89 while the Cronbach's alpha for the total scores was 0.86. Test-retest correlation coefficients for the 40 items score were highly significant. Intraclass correlation coefficient was high (ICC=0.39 to 0.89). A high degree of sensitivity and specificity to the effects of treatment was observed. A high degree of significant level between baseline and post-treatment scores was observed across nearly half of the items in surgical group but not in the non-LUTS group (control subjects). The STAI is reliable, valid and sensitive to clinical change in a sample of Malaysian patients with and without urinary symptoms.

Aged↗
PubMed2003

The sensitivity of the Malay version of Brief Manual of Sexual Function Inventory in assessing erectile dysfunction secondary to benign prostatic hyperplasia.

This study aimed to assess the sensitivity of the Malay version of the Brief Manual Sexual Function Inventory (BMSFI) on patients with and without urinary symptoms in Malaysian population. Validity and reliability were studied in patients with lower urinary tract symptoms (LUTS) and patients without LUTS. Reliability and validity was evaluated by using the test-retest method while internal consistency was assessed by Cronbach's alpha. Sensitivity to change was expressed as the effect size in the pre-intervention versus post-intervention score in patients who underwent transurethral resection of the prostate (TURP). Internal consistency was excellent. A high degree of internal consistency was observed for each of the 11 items and 5 domains (Cronbach's alpha value = 0.67 and higher and 0.73 and higher respectively). Test-retest correlation coefficient for the 11 items scores was highly significant. Intraclass correlation coefficient was high (ICC = 0.68 and above). The sensitivity and specificity showed a high degree of sensitivity and specificity to the effects of treatment. A high degree of significant level between baseline and post-treatment scores were observed across 3 domains in the treatment corresponds cohort but not in the control group. The Mal-BMSFI is a suitable, reliable, valid and sensitive to clinical change in the Malaysian population.

Adult↗
PubMed2003

Sexual function outcomes following treatment for lower urinary tract symptoms. A one-year study.

The aim of this study was to assess the effects of treating lower urinary tract symptoms (LUTS) on the quality of sexual function in a one-year follow up. A total of 116 patients with LUTS received alpha-blocker treatment, 111 patients underwent transurethral resection of the prostate (TURP) and 70 patients with renal stones, with no or mild symptoms served as a control group. The patients were assessed at baseline, three months, six months and twelve months using the International Index of Erectile Function (IIEF-15). The surgical group exhibited some changes in the domain of IIEF-15. Patients in the medical group showed improvement in erectile function and intercourse satisfaction, while orgasmic, overall sexual satisfaction and sexual drive were relatively unchanged. In contrast, the surgical group suffered retrograde ejaculation and overall sexual dissatisfaction after undergoing TURP. TURP has been found to be associated with retrograde ejaculation intercourse and overall sexual dissatisfaction.

Adrenergic alpha-Antagonists↗
PubMed2003

Peritoneal implantation of ureter in a cadaveric kidney transplant recipient.

We report here a case of a kidney transplant recipient in whom the ureter was initially implanted into the peritoneum. Excessive ultrafiltration volume and reversal of serum vs dialysate creatinine ratio when the patient was recommenced on continuous ambulatory peritoneal dialysis first suggested the diagnosis which was subsequently confirmed by a plain abdominal x-ray demonstrating placement of ureteric stent in the peritoneum. This rare complication was successfully corrected with surgical re-implantation of ureter into the bladder and 5 years later, the patient remains well with good graft function.

Adult↗
PubMed2003

Clinical usefulness of tumour markers.

Tumour markers are substances related to the presence or progress of a tumour. An ideal tumour marker is (1) detectable only when malignancy is present, (2) specific for the type and site of malignancy, (3) correlates with the amount of malignant tissue present and (4) responds rapidly to a change in tumour size. At present, no tumour marker fulfills all of the above criteria. The first part of the review discusses the clinical usefulness of the commonly requested serum tumour markers, namely, prostate-specific antigen (PSA), CA 19-9, carcinoembryonic antigen (CEA), CA 125, CA 15-3, human chorionic gonadotrophin (hCG) and alpha-foetoprotein (AFP). It is hoped that this review article will decrease the abuse and misuse of these commonly requested serum tumour markers. The second part of the review discusses the clinical usefulness of catecholamines and their metabolites, calcitonin, thyroglobulin, parathyroid hormone, prolactin, adrenocorticotrophic hormone, oestrogen and progesterone receptors, p53, HER-2/c-erbB2, BRCA1 and BRCA2.

Biomarkers, Tumor↗
PubMed2002

Genetic variability in the coat protein genes of two orchid viruses: Cymbidium mosaic virus and Odontoglossum ringspot virus.

The variability in coat protein gene sequences of Cymbidium mosaic virus (CymMV) and Odontoglossum ringspot virus (ORSV) that naturally infect orchids worldwide was investigated. Samples were collected from Korea, Singapore and Taiwan. The sequence data were compared with available published coat protein gene sequences of CymMV and ORSV, including those from Japan and Thailand. Among CymMV isolates, the homology was 89.1%-99.7% and 93.2%-100% at the nucleotide and amino acid levels, respectively. Among the ORSV isolates, the homology was 95.5%-100% and 93%-100% at the nucleotide and amino acid levels, respectively. No particular region of variability could be defined in either of the viruses. In deduced amino acid sequence, the N-terminal was more conserved than the C-terminal in both CymMV and ORSV. By comparing all sequences determined in this study and those that are published in the GenBank databases, we did not find clustering based on geographical distribution or sequence identity. Such high sequence conservation suggests that both CymMV and ORSV coat protein genes are suitable candidates to provide resistance to orchids cultivated in different geographical locations.

Amino Acid Sequence↗
PubMed2002

Reliability and validity of the Malay version of the International Index of Erectile Function (IIEF-15) in the Malaysian population.

The objective of this study was to validate the Malay version of the International Index of Erectile Function (IIEF-15) in patients with lower urinary tract symptoms. Reliability and validity was assessed by using the test-retest while Cronbach's alpha was used to assess internal consistency. Effect size 5was evaluated to assess the sensitivity to change in the pre-transurethral resection of the prostate (TURP) vs post-TURP. Internal consistency was excellent. A high degree of internal consistency was observed for each of the 15 items and five domains (Cronbach's alpha value=0.56 and higher and 0.74 and higher, respectively). Test-retest correlation coefficient for the 15 items and domains scores showed no significant changes. Intraclass correlation coefficient for 15 items and domains were high (ICC=0.59 and above). It can be concluded that the Mal-IIEF-15 is suitable, reliable, valid and sensitive to clinical change in the Malaysian population.

Erectile Dysfunction↗
PubMed2002

Reliability and validity of the Malay version of the Health-Related Quality of Life instrument in a Malaysian population.

OBJECTIVE: To validate the Malay version of the Health-Related Quality of Life (Mal-HRQOL-20) questionnaire in patients with and without urinary symptoms in a Malaysian population. PATIENTS AND METHODS: The validity and reliability of the Mal-HRQOL-20 were assessed in patients with and without lower urinary tract symptoms (LUTS). The reliability was evaluated using the test-retest method and the internal consistency using Cronbach's alpha. Sensitivity to change was expressed as the effect size in the score before and after intervention in additional patients with LUTS who underwent transurethral resection of the prostate. RESULTS: The internal consistency was excellent; there was a high degree of internal consistency for each of the 20 items and for the overall score (Cronbach's alpha > or = 0.57 and 0.79, respectively) in the population study. The test-retest correlation coefficient for the 20 item scores was highly significant. The intra-class correlation coefficient was high (> or = 0.55). The sensitivity and specificity were high for the effects of treatment. There was a very significant agreement between scores before and after treatment across all domains in the treatment cohort, but not in the control group. CONCLUSION: The Mal-HRQOL-20 is suitable, reliable, valid and sensitive to clinical change in the Malaysian population.

Aged↗
PubMed2002

The effects of treating lower urinary tract symptoms on health-related quality of life: a short-term outcome.

OBJECTIVES: This study examined the effects of treatment of lower urinary tract symptoms (LUTS) on the health-related quality of life (physical/functional, mental, social and global aspect), pain and prostatic symptoms. PATIENTS AND METHODS: The study consisted of 123 LUTS patients on medical treatment (alpha blockers) and 52 who underwent surgical treatment (TURP). The patients were assessed one week before and three months after medical and surgical treatment by using the Health-Related Quality of Life (HRQOL-20), the Visual Analogue Scale of Pain (VAS), the Present Pain Intensity (PPI) and the International Prostate Symptom Score (I-PSS) inventories and questionnaires. RESULTS: Prior to treatment, the surgically treated patients were found to suffer more pain, severe prostatic symptoms, bothersomeness and deterioration in health-related quality of life than the medically treated patients. Postoperatively, the surgical group showed a significant reduction and improvement in all aspects of pain, prostatic symptoms, bothersomeness and overall health-related quality of life, as compared with the medication group. The mean ages of the surgical and medical treated groups were 69.56 years (SD=7.94 years) and 64.62 years (SD=7.94 years) respectively. CONCLUSIONS: The result showed that operative procedure had significantly improved the overall health-related quality of life of LUTS patients compared to those on medical treatment.

Adrenergic alpha-Antagonists↗
PubMed2002

The performance properties of the International Index of Erectile Function (IIEF-15) in assessing erectile dysfunction in patients with lower urinary tract symptoms.

To validate the International Index of Erectile Function (IIEF-15) in Malaysian population. Reliability and internal consistency were evaluated using the test-retest method and Cronbach's alpha. Sensitivity to change was expressed as the effect size index. Internal consistency was excellent (Cronbach's alpha value = 0.75 to 0.90) Test-retest correlation coefficient and intraclass correlation coefficient were highly significant (ICC = 0.75 and above) and a high degree of sensitivity and specificity was observed. The IIEF-15 is suitable, reliable, valid and sensitive to clinical change in the Malaysian population.

Aged↗
PubMed2001

Quality of life assessment before and after transurethral resection of the prostate in patients with lower urinary tract symptoms.

OBJECTIVES: The aim of this study was to determine the effects of surgical treatment of lower urinary tract symptoms (LUTS) in a Malaysian population by evaluating the quality of life before and after treatment. PATIENTS AND METHODS: The study group comprised 111 LUTS patients (age 69.56 +/- 7.94 years, mean +/- SD ) who were assessed 1 week before and at 3, 6 and 12 months after treatment using the health-related quality of life (HRQOL-20) questionnaire, a visual analogue scale (VAS), the present pain intensity (PPI) scale and the international prostate symptom score (I-PSS). RESULTS: Preoperatively the patients suffered more pain, severe prostatic symptoms, impaired disease-specific quality of life and a reduction in health-related quality of life. Postoperatively the patients showed a significant reduction and improvement in pain, prostatic symptoms, and disease-specific and health-related quality of life. CONCLUSIONS: The results showed that the operative procedure significantly improved the overall quality of life of patients with LUTS.

Aged↗
PubMed2001

Cucurbit protoplast isolation for the study of plant virus replication.

A cucurbit protoplast isolation protocol was established for the study of plant virus replication in vivo. This protocol is applicable to both cucumber and squash leaf tissue with significant increases in yields of viable protoplasts suitable for electroporation, compared to other published methods. A combination of Cellulase RS, Macerozyme R10 and mannitol was used as digestion enzymes and osmoticum. An average of 1.7x10(7) protoplasts per gram of fresh leaf tissue were obtained from cucumber cultivar Bet-alpha. Both cucumber cultivar Shimson and squash cultivar First Taste produced an average yield of 6.0x10(6) protoplasts per g of fresh leaf tissue. Electroporation of 10 microg of Zucchini yellow mosaic potyvirus (ZYMV-S) RNA into the protoplasts resulted in virus replication and synthesis of coat protein (CP). SDS-PAGE and immunoblotting were used to detect the CP 48 h post-electroporation. This protocol is highly reproducible and will assist researchers who require cucurbit protoplasts to study virus replication.

Cell Separation↗
PubMed2001

Reliability and validity of the General Health Questionnaire (GHQ-12) among urological patients: a Malaysian study.

This present study was undertaken to validate the English version of the General Health Questionnaire (GHQ-12) in urological patients. Validity and reliability were studied in patients with lower urinary tract symptoms (LUTS) and patients without LUTS. Reliability was evaluated using the test-retest method and internal consistency was assessed using Cronbach's alpha. Sensitivity to change was expressed as the effect size in the pre-intervention versus post-intervention score in additional patients with benign prostatic hyperplasia (BPH) who underwent transurethral resection of the prostate (TURP). Internal consistency was excellent. A high degree of internal consistency was observed for each of the 12 items with Cronbach's alpha value of 0.37-0.79, while total scores was 0.79 in the population study. Test-retest correlation coefficient for the 12 items score were highly significant. Intraclass correlation coefficient was high (0.35-0.79). It showed a high degree of sensitivity and specificity to the effects of treatment. A high degree of significant level between baseline and post-treatment scores were observed across all 12 items in the treatment cohort but not in the control group. The GHQ-12 is suitable, reliable, valid and sensitive to clinical change in urological disorders.

Adult↗
PubMed2001

Reliability and validity of the International Prostate Symptom Score in a Malaysian population.

OBJECTIVE: To validate the English version of the International Prostate Symptom Score (IPSS) in patients with and without urinary symptoms in a Malaysian population. PATIENTS AND METHODS: Validity and reliability were assessed in patients with lower urinary tract symptoms (LUTS) and in patients with no LUTS. Reliability was evaluated using the test-retest method and internal consistency using Cronbach's alpha. Sensitivity to change was expressed as the effect size in the score before and after intervention in additional patients with LUTS who underwent transurethral resection of the prostate (TURP). RESULTS: Internal consistency was excellent; there was a high degree of internal consistency for each of the seven domains and for the total score (Cronbach's alpha > or = 0.60 and > or = 0.79, respectively) in the populations studied. The test-retest correlation coefficient for the seven domain scores was highly significant. The intra-class correlation coefficient was high (> or = 0.59). There was a high level of sensitivity and specificity for the effects of treatment, with a very significant change between the seven scores domains in the treated group but not in the control group. CONCLUSIONS: The IPSS is suitable, reliable, valid and sensitive to clinical change in the Malaysian population.

Aged↗
PubMed2001

Beck Depression Inventory (BDI): a reliability and validity test in the Malaysian urological population.

This study aimed to validate the Beck Depression Inventory (BDI) in the Malaysian urological population. Reliability and internal consistency were evaluated using the test-retest method and internal consistency was assessed using Cronbach's alpha. Responsiveness was expressed as the effect size. Internal consistency was high (Cronbach's alpha value = 0.56 to 0.87). Test-retest correlation coefficient and intraclass correlation coefficient were significant (ICC = 0.56 to 0.87) and a high degree of sensitivity and specificity. The BDI is thus a reliable and a valid instrument to be used in Malaysia.

Depressive Disorder↗
PubMed2001

A Malaysian Study on the reliability and validity of the Health-Related Quality of Life Questionnaire (HRQOL-20) in urological patients.

Main objective of this study is to validate the Health-Related Quality of Life (HRQOL-20) in the Malaysian population. Reliability and internal consistency were evaluated using the test-retest method and Cronbach's alpha. Responsiveness was expressed as the effect size. Internal consistency was excellent (Cronbach's alpha value = 0.68 to 0.87). Test-retest correlation coefficients and intraclass correlation coefficient were significant (ICC = 0.58 and 0.91) as well as the high degree of sensitivity and specificity. The HRQOL-20 is a reliable, valid and sensitive to clinical changes in the Malaysian urological population.

Aged↗