Low Residue Diet Study
Ontology highlight
ABSTRACT:
PROVIDER: PRJEB30307 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| ERR3015720_1.fastq.gz | Fastqsanger.gz | |||
| ERR3015720_2.fastq.gz | Fastqsanger.gz | |||
| ERR3015730_1.fastq.gz | Fastqsanger.gz | |||
| ERR3015730_2.fastq.gz | Fastqsanger.gz | |||
| ERR3015740_1.fastq.gz | Fastqsanger.gz |
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Project description:One tricky aspect of the recommendations for colonoscopy prep is diet. This has a significant impact on the experience of the patient or participant in the screening program and, on the other hand, low adherence has been found in some studies despite a potential Hawthorne effect . It is noteworthy that despite its impact on patient experience, it is an area for which little evidence is available, which is why the guidelines give low-quality recommendations and there is probably considerable variability in clinical practice .
In the early days of colonoscopy, a liquid diet for 48 hours was mainly recommended, although some centers indicated a low-residue diet or even the commercially available NASA astronaut diet. Later, the indication for a liquid diet was consolidated until finally numerous studies were published in favor of a low-residue diet, managing to increase tolerance and the quality of the preparation . A limitation of the preparation studies must be borne in mind that the colon cleansing rating scales were not introduced until 1999 when the Aronchick scale was published.
Although there is solid evidence in favor of a low-residue diet versus a liquid diet, the investigators do not have evidence on how many days of a low-residue diet should be recommended, and this is reflected in the ESGE (European Society of Gastrointestinal Endoscopy) and ASGE (American Society of Gastrointestinal Endoscopy) guidelines . A randomized clinical trial comparing 3 days versus 1 day of a low residue diet has recently been published . There were no statistically significant differences in the rate of adequate preparations (82.7% vs. 85.6% OR 1.2 95% IC 0.72 to 2.15). However, this study has limited statistical power and a design that allows a non-inferiority analysis has not been followed. In relation to this, our research group is finalizing a non-inferiority clinical trial in whose intermediate analysis, with 421 participants, the non-inferiority of 1 day of diet is fulfilled (rate of poor preparation in 1 day 0.95% vs. 4.74% in 3 days; d + 5%, difference -3.78% IC -6.88% to -1.12%) (38).
It is likely, taking into account the available evidence and its evolution, that diet plays a secondary role in preparation. Although no studies designed to directly assess this have been conducted, the research group has indirect data.
Walter et al, under the hypothesis that the impact of the fractional preparation and the new preparations on the preparation diminished the importance of the diet, conducted a non-inferiority clinical trial between 2012 and 2013 in which they randomized the patients to follow a diet liquid versus low residue for one day and fractional preparation with Moviprep (39). They established a non-inferiority margin of -13.5%. Their results show a rate of good preparation (Boston> 5) in 68/72 (94.4%) in a liquid diet compared to 60/68 (88.2%) in a low-residue diet (p = 0.04) with a difference of -5.08% demonstrating non-inferiority of the low residue diet.
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Project description:Colonoscopy is the gold-standard for the evaluation of the colorectal mucosa. Colonoscopy quality indicators are the adenoma detection rate, the rate of cecal intubation and the bowel preparation.
The role of diet in preparing for colonoscopy is not fully established. Currently there is not enough evidence available to choice between 3 days of low residue diet versus 1 day.
The research hypothesis is that the low residue diet offers a non-inferior bowel preparation and an improved tolerance.
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Project description:Previous researches demonstrated that a prepackaged low-residue diet (LRD) could achieve better bowel preparation quality compared with a self-prepared LRD. However, up to now, there has been no widely acceptable standard of LRD for bowel preparation. Moreover, these prepackaged LRD adopted in previous studies mainly consisted of traditional foods without further processing. Recently, a prepackaged LRD for Special Medical Purpose was specifically designed for bowel preparation. This trail was to compare the impact of the prepackaged LRD on bowel preparation for colonoscopy with self-prepared LRD by patients.
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Project description:The objective of the study is to examine the effect of adding a strict low-residue lunch on the day before colonoscopy has on clinical efficacy and patient tolerability of bowel preparation, with patients receiving split-dose Polyethylene Glycol Based Lavage.
The primary outcomes will be 1) quality of preparation in cleansing the colon and 2) patient satisfaction
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Project description:Colonoscopy is the technique of choice for the evaluation of the mucosa of the colon. To be able to do the procedure in optimal conditions, it needs to be clean. Therefore, it is necessary to carry out a preparation as safe and tolerable as possible. This preparation generally consists in a low residue diet the days before the colonoscopy and in the intake of a laxative solution. In previous studies, it has been shown that the low residue diet does not play a relevant role as it was considered before. Recent studies demonstrated that reducing the days of low residue diet does not worsen the cleansing and improves the patient experience. The results of this study are required for determining the role of diet restrictive diet in colon cleansing.
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Project description:Prostate Microarrays for two studies on Low-Fat, Low-Glycemic Load Diet intervention in prostate cancer and the effect of Surgical Manipulation on Prostate Gene Expression. Influence of Surgical Manipulation on Prostate Gene Expression: Implications for Molecular Correlates of Treatment Effects and Disease Prognosis "Measurements of tissue gene expression are increasingly used for disease stratification, clinical trial eligibility, and assessment of neoadjuvant therapy response. However, the method of tissue acquisition alone could significantly influence the expression of specific transcripts or proteins. This study examines whether there are transcript alterations associated with surgical resection of the prostate gland by radical retropubic prostatectomy." Low-Fat, Low-Glycemic Load Diet and Gene Expression in Human Prostate Epithelium: A Feasibility Study of Using cDNA Microarrays to Assess the Response to Dietary Intervention in Target Tissues "We examined the feasibility of using gene expression changes in human prostate epithelium as a measure of response to a dietary intervention." Keywords: Low-fat, Low-Glycemic Load, Prostate Cancer, Radical Prostatectomy, Ischemia
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