Six preoperative factors underpin a proposed incisional-hernia classification
A Thai case-control study awaiting peer review proposes a classification of incisional hernia using six factors available before abdominal surgery. Researchers compared 100 cases with 100 controls matched by operation type. Age, body mass index and several clinical characteristics were associated with hernia. The score ranks patients within the selected sample and does not calculate absolute disease probability for an individual.
Science··Morning
Six factors enter the preoperative score
A Thai case-control study linked incisional hernia to six preoperative factors: age and body mass index, earlier abdominal operations, female sex, hypertension and diabetes. Incisional hernia develops at the site of an earlier surgical incision. The researchers combined the six preoperative factors into a points-based classification. Published on 17 October, the first version is awaiting peer review. Its score provides relative classification within a selected sample, rather than an individual’s absolute probability of developing hernia.[1]
Cases and controls underwent matched operations
At Vajira Hospital in Bangkok, Thailand, investigators compared 100 adults with hernia and 100 without it, matching each pair by operation type. Records covered 2018–2024. Computed tomography confirmed the hernia diagnoses. Eligibility required at least a year of follow-up, complete preoperative information and no pre-existing hernia at the incision site.[1]
The model’s apparent area under the curve, a measure of discrimination, was 0.82. After bootstrap resampling it was 0.80. Serum albumin measurements came from the repair procedure, too late to serve as a predictor preceding the original operation.[1]
Referral patterns constrain the score’s reach
Other hospitals had treated approximately 40 per cent of cases. This may bias selection, and investigators lacked a separate code for referral status. Equal sampling of cases and controls prevents estimating population incidence. The retrospective design and single-centre setting leave causal relationships and the effectiveness of preventive interventions untested. Prospective external validation across multiple centres has not been performed.[1]
