Wolff 1989.
| Methods | RCT | |
| Participants | Abd.colorectal surgery | |
| Interventions | NGT | |
| Outcomes | time to flatus nausea vomit hernia (via otchy) | |
| Notes | 9 | |
| Risk of bias | ||
| Bias | Authors' judgement | Support for judgement |
| Allocation concealment? | Low risk | A ‐ Adequate |
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