Agrawal 2009.
| Methods |
RCT Methods to control for contributory patient factors: none described |
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| Participants |
Age: not described Gender: not described Types of incisions: all participants received a vertical midline incision Types of surgery: emergency surgery for peritonitis Contamination classification of included participants: not described Pre‐operative antibiotic use: all participants received ceftriaxone and metronidazole Prognostic patient factors: not described Inclusion criteria: all patients with peritonitis at a single centre Exclusion criteria: none described |
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| Interventions |
Comparisons reported: Group 1: Suture: polygalactin‐910 (multifilament, fast absorbable) Suturing technique: continuous Closure method: mass Group 2: Suture: polygalactin‐910 (multifilament, fast absorbable) Suturing technique: interrupted Closure method: mass Group 3: Suture: polypropylene (monofilament, non‐absorbable) Suturing technique: continuous Closure method: mass Group 4: Suture: polypropylene (monofilament, non‐absorbable) Suturing technique: interrupted Closure method: mass Surgeon characteristics: "Trained surgeon with a minimum of three years of surgical residency" |
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| Outcomes |
Incisional hernia: clinical exam, confirmed with ultrasound Follow‐up duration: 3 months and 4 years Wound infection: not defined Dehiscence: not defined Sinus or fistula: not defined |
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| Notes | Hernia outcome data used from the 4‐year follow‐up period As this was a factorial design, the outcomes for each group were input separately against their comparison group |
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| Risk of bias | ||
| Bias | Authors' judgement | Support for judgement |
| Random sequence generation (selection bias) | Unclear risk | "Draw of lots" by nurse |
| Allocation concealment (selection bias) | Unclear risk | Not stated |
| Blinding (performance bias and detection bias) All outcomes | Low risk | Outcome assessor blinded |
| Incomplete outcome data (attrition bias) All outcomes | Low risk | All participants accounted for and analysed |
| Selective reporting (reporting bias) | Low risk | Hernia (at least 1 year); dehiscence and wound infection outcomes all reported |
| Other bias | Unclear risk | Exclusion criteria, postoperative care, etc. not described |