Population-based ultrasound reference values for inter-rectus distance: threshold prevalence, percentiles, and the limitations of fixed cutoffs
This population-based study aimed to characterize the distribution of inter-rectus distance (IRD) and its upper range in adult women using standardized multisite ultrasound measurements and a percentile-based interpretive framework. Data was driven from the Finnish Women’s Health Study (WENDY, 2020–2023), comprising wo...