Occupational-class trends in diagnosis-specific sickness absence in Finland: a register-based observational study in 2011–2021

The magnitude and order of the occupational-class differences in LTSA changed between 2011 and 2021, along with increasing LTSA due to mental disorders, especially among employees, and decreasing LTSA due to somatic diagnoses, especially among manual workers. Occupational-class differences should be taken into account when aiming to prevent LTSA and especially further increases in LTSA due to mental disorders.