Inability to Work Fulltime and the Association with Paid Employment One Year After the Work Disability Assessment: A Longitudinal Register-Based Cohort Study.

This is an observational register study, not a trial, so it cannot show that being assessed as unable to work fulltime caused any change in employment. Disease severity, symptoms, motivation, job support and actual work accommodations were not measured, so they may explain part of the associations. The sample only includes applicants granted a partial disability benefit, not those with full or no benefit. The analysis did not separate how many hours per day someone was assessed as able to work. Several disease-group findings came from subgroup tests, and the paper notes a risk of false-positive findings from multiple testing. Employers were not given the assessment results, so the study cannot show how employers used the information.

Do not conclude that assessing inability to work fulltime improves or harms employment. The adjusted overall association was null, and the disease-group findings are observational subgroup associations, not evidence that reduced hours caused employment changes.