Study | Method | Patients | Caecum/right colon pH | Left colon/ rectal pH | ||
McDougall, 199314 | Colonoscopy probe | 21 normals | 7.1 | 7.2–7.5 | ||
37 neoplasia | 7.2 | 7.2–7.4 | ||||
McNeil, 198715 | Microelectrodes, human rectal biopsies | 6 normals | N/A | 6.3–6.8 | ||
5 ulcerative proctitis | N/A | 6.3–6.8 |
N/A, data not available.