Research Article
24-Hour Measurement of Gastric pH in Rural South Africa
| | 24-hour and daytime pH results | | | Mean 24-hour gastric pH | 2.84 | | Lowest pH achieved (range of 0 to 4) | 0.5 (0.2, 0.6) | | Percentage of time gastric pH >4 (range of 0.4 to 65.9) | 22.2 (13.9, 33.7) | | Percentage of time supine pH >4 (range of 0 to 71) | 26 | | Percentage of time gastric pH >7 (range of 0 to 37.4) | 7.6 (0.6, 12.9) | | Mean daytime gastric pH | 2.67 |
| | Nighttime pH results (12 midnight to 6 am) | | | Mean nighttime gastric pH | 3.7 | | Nighttime minutes pH >4 (range of 0 to 359.6) | 136.4 (22.8, 208.1) | | Nighttime minutes pH >7 (range of 0 to 287.1) | 79.3 (2.5, 122.7) |
| | Rapid alkaline rises | | | (Rises in less than 10 seconds from a baseline of pH2 or less, to a pH of 4 or more) | | Rapid alkaline rises in 24 hours (range of 0 to 390) | 17 (10, 47) |
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