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Patient characteristics
| SWG (n = 40) | SPG (n = 40) | P value | |
| Gender (M/F) | 12/28 | 19/21 | 0.11 |
| Mean age, yr (SD) | 55.8 (18.1) | 48.5 (18.2) | 0.07 |
| Smoking (yes/no) | 15/25 | 23/17 | 0.07 |
| Caffeine (yes/no) | 37/3 | 32/8 | 0.19 |
| Alcohol (yes/no) | 12/28 | 14/26 | 0.63 |
| Previous EGD (yes/no) | 17/23 | 23/17 | 0.18 |
SWG: Swab group; SPG: Spray group; M: Male; F: Female; EGD: Esophagogastroduodenoscopy. P value for difference between groups using χ2 or Fisher’s exact tests.
