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| Name | Class |
|---|---|
| Queen Mary University of London | OTHER |
| Imperial College London | OTHER |
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This study is a randomised, parallel group, controlled trial, comparing the effects of fruit products as to their physiological, microbiologic and metabolomic effects on the gut, as well as their effects on the dietary intake and quality in healthy people with constipation.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Intervention fruit products 1 | Experimental | Three servings of fruit products per day for 4 weeks. |
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| Intervention fruit products 2 | Experimental | Three servings of fruit products per day for 4 weeks. |
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| Control fruit products | Placebo Comparator | Three servings of control fruit products per day for 4 weeks. |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Fruit Products | Other | Fruit Products with the potential to improve constipation-related outcomes |
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| Measure | Description | Time Frame |
|---|---|---|
| Change in faecal weight between baseline and week 4 | Change in 7-day faecal weight | week 4 |
| Measure | Description | Time Frame |
|---|---|---|
| Faecal microbiome diversity | Global microbiota composition (α-diversity, β-diversity) | week 0 and 4 |
| Faecal microbiome | Ιndividual phyla, family, genera, species and strains of the faecal gut microbiome (absolute and change). |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Zoi Katsirma, MSc | Contact | 020 7848 4552 | zoi.katsirma@kcl.ac.uk | |
| Eirini Dimidi, MSc, PhD | Contact | 020 7848 4552 | eirini.dimidi@kcl.ac.uk |
| Name | Affiliation | Role |
|---|---|---|
| Kevin Whelan, MSc, PhD | King's College London | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| King's College London | Recruiting | London | SE1 9NH | United Kingdom |
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| ID | Term |
|---|---|
| D003248 | Constipation |
| ID | Term |
|---|---|
| D012817 | Signs and Symptoms, Digestive |
| D012816 | Signs and Symptoms |
| D013568 | Pathological Conditions, Signs and Symptoms |
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| week 0 and 4 |
| Faecal metabolomic profile | Faecal metabolomic profile (absolute and change) measured using proton nuclear magnetic resonance | week 0 and 4 |
| Urine metabolomic profile | Urine metabolomic profile (absolute and change) measured using proton nuclear magnetic resonance | week 0 and 4 |
| Faecal short-chain fatty acids | Faecal short-chain fatty acids concentration (absolute and change) | week 0 and 4 |
| Faecal water content | Faecal water content (absolute and change) measured through lyophilisation | week 0 and 4 |
| Faecal pH | Faecal pH (absolute and change) | week 0 and 4 |
| Stool output | Assessed using 7-day diaries and the Bristol Stool Form Scale (absolute and change).. | week 0 and 4 |
| Individual gastrointestinal symptoms | The 7-day diaries contain a short questionnaire for each bowel movement to monitor completeness, spontaneity, straining and need for manual maneuvers. The validated Gastrointestinal Symptom Rating Scale will be used over a 7-day period | week 0 and 4 |
| Gastrointestinal symptoms - PAC-SYM | The validated questionnaire Patient Assessment of Constipation Symptoms (PAC-SYM) will be used (absolute and change). | week 0 and 4 |
| Gastrointestinal symptom severity questionnaire - CCCS | The validated questionnaire Cleveland Clinic Constipation Score (CCCS) will be used (absolute and change). | week 0 and 4 |
| Dietary intake | Dietary intake (absolute and change) will be recorded in 7-day food and drink diaries | week 0 and 4 |
| Constipation-related quality of life | Constipation-related quality of life (absolute and change) which will be measured with the condition-specific validated Patient Assessment of Constipation Quality of Life (PAC-Qol) questionnaire. PAC-QoL is a self-report 28-item tool that uses a 5-point Likert scale ranging from "Not at all" to "Extremely". | week 0 and 4 |
| Whole and regional gut transit time/pH | Whole gut transit time and regional gut pH (absolute and change) will be assessed in a subset of participants (n=39), by using a motility capsule (SmartPill ®, Medtronic) | week 0 and 4 |
| Acceptability of interventions | Acceptability of the interventions measured using a questionnaire that included 3- and 4-point likert scales and open-text answers | week 0 and 4 |
| Compliance | Compliance to the study interventions will be measured using specific questions relevant to the intervention received in the food and drink diary completed at week 4, by regular phone calls with participants throughout the intervention period, and by the number of unconsumed fruit products returned by the participants after the end of the intervention. | week 0 and 4 |