Are driver’s licenses issued within 3 years of cancer diagnosis a valid source of BMI data?

Overweight and obesity are risk factors for several cancers; however, population-based cancer registries do not routinely collect data on body mass index (BMI). This study evaluated the utility of supplementing cancer registry data with BMI data derived from driver’s license records. We linked self-reported height and weight data from driver’s license records to directly measured values, obtained via medical record abstraction, in a sample of...