Sources and References

Full reference list for bristolstoolchart.com - Updated April 2026

This site is written to be consistent with NHS and NICE guidance and with peer-reviewed gastroenterology literature. We update content when relevant guidelines are revised. Primary sources are prioritised throughout. Where consumer-facing NHS pages summarise clinical guidance, we link to the underlying clinical guideline where possible.

Primary Source

Lewis SJ, Heaton KW (1997). Stool Form Scale as a Useful Guide to Intestinal Transit Time. Scandinavian Journal of Gastroenterology, 32(9):920-924. DOI: 10.3109/00365529709011203. [The original 1997 paper that established the Bristol Stool Form Scale and its correlation with colonic transit time.]

NHS and NICE Guidelines

NHS England (2023). Bristol Stool Chart for Carers [web version]. NHS England. Available at: england.nhs.uk [The official NHS England carer-specific chart, published 2023, widely used in care home and community settings.]
NICE (2008, updated 2017). Irritable bowel syndrome in adults: diagnosis and management. NICE guideline CG61. National Institute for Health and Care Excellence. [Covers IBS diagnosis, Bristol scale use, low-FODMAP, and treatment pathway.]
NICE (2015, updated 2023). Suspected cancer: recognition and referral. NICE guideline NG12. [Sets the 2-week-wait referral criteria for suspected bowel cancer, referenced throughout the red flags section.]
NICE (2010, updated 2020). Constipation in children and young people: diagnosis and management. NICE guideline CG99. [Covers paediatric constipation management including macrogol as first-line treatment.]
NHS UK. Constipation. nhs.uk/conditions/constipation/ [NHS patient-facing guidance on constipation causes, treatment, and when to see a GP.]
NHS UK. Diarrhoea and vomiting. nhs.uk/conditions/diarrhoea-and-vomiting/ [NHS patient-facing guidance on acute diarrhoea, rehydration, and when to seek care.]
NICE (2016). Linaclotide for treating chronic idiopathic constipation. Technology appraisal TA318. [NICE approval of linaclotide (Constella) for IBS-C and chronic idiopathic constipation.]

Rome IV Criteria

Drossman DA, ed. (2016). Rome IV: Functional Gastrointestinal Disorders - Disorders of Gut-Brain Interaction. Rome Foundation. [The definitive reference for IBS diagnostic criteria using Bristol types. Subtyping criteria (IBS-C, IBS-D, IBS-M) are drawn directly from this source.]
Mearin F, Lacy BE, Chang L, et al. (2016). Bowel Disorders. Gastroenterology, 150(6):1393-1407. [Published Rome IV chapter on bowel disorders including IBS classification using Bristol scale.]

Gastroenterology and Clinical Evidence

Longstreth GF, Thompson WG, Chey WD, et al. (2006). Functional Bowel Disorders. Gastroenterology, 130(5):1480-1491. [Rome III criteria - precursor to Rome IV, establishes importance of Bristol scale in clinical classification.]
Gibson PR, Shepherd SJ (2010). Evidence-based dietary management of functional gastrointestinal symptoms: The FODMAP approach. J Gastroenterol Hepatol, 25(2):252-258. [Key reference for low-FODMAP diet evidence in IBS management.]
Pimentel M, Lembo A (2020). Microbiome and Its Role in Irritable Bowel Syndrome. Dig Dis Sci, 65(5):1273-1281. [Reviews gut microbiome in IBS pathophysiology.]
Quigley EM (2019). Prebiotics and Probiotics in Digestive Health. Clin Gastroenterol Hepatol, 17(2):333-344. [Evidence review of probiotic strains in gastrointestinal conditions.]
Gatta L, Scarpignato C (2017). Systematic review with meta-analysis: Rifaximin is effective and safe for the treatment of small intestine bacterial overgrowth. Aliment Pharmacol Ther, 45(5):604-616.
Camilleri M, Acosta A, Busciglio I, et al. (2014). Effect of colesevelam on faecal bile acids and bowel functions in diarrhoea-predominant irritable bowel syndrome. Aliment Pharmacol Ther, 39(11):1261-1270. [Bile acid diarrhoea treatment evidence.]

Paediatric Sources

Tabbers MM, DiLorenzo C, Berger MY, et al. (2014). Evaluation and treatment of functional constipation in infants and children: evidence-based recommendations from ESPGHAN and NASPGHAN. J Pediatr Gastroenterol Nutr, 58(2):258-274.
NHS Start4Life. Baby poo guide. start4life.com [NHS-aligned consumer guidance on infant stool patterns by age and feeding type.]

Bowel Cancer and Red Flags

Bowel Cancer UK (2023). Bowel cancer symptoms. bowelcanceruk.org.uk [Patient-facing symptom guide from the UK's specialist bowel cancer charity.]
Cancer Research UK. Bowel cancer statistics. cancerresearchuk.org [UK bowel cancer incidence, screening, and outcomes data.]
Mant D, Fuller A, Northover J, et al. (1992). Patient fatalism and patient responsibility for cancer. Analysis of different attitudes to screening for colorectal cancer. Soc Sci Med, 34(3):305-313.

IBD References

Crohn's and Colitis UK. Information and support for IBD. crohnsandcolitis.org.uk [The UK's leading IBD patient charity. Clinical resources for Crohn's disease and ulcerative colitis.]
Feuerstein JD, Cheifetz AS (2017). Crohn Disease: Epidemiology, Diagnosis, and Management. Mayo Clin Proc, 92(7):1088-1103.
Ordas I, Eckmann L, Talamini M, et al. (2012). Ulcerative colitis. Lancet, 380(9853):1606-1619.