"longer sickness" is a correct and usable phrase in written English.
You could use it in a sentence such as: "Jane was out of work for six months due to her longer sickness."
The duration of symptoms can be related to the severity of symptoms, which in turn may be responsible for longer sickness absence.
Outcomes of this study comprised all self-certified short (1 3 days), and medically confirmed intermediate (4 14 days) and long (15 days or longer) sickness absence spells.
A particular strength of this study was the prospective design with two repeated measures of economic difficulties and a register-based follow-up of subsequent shorter and longer sickness absence spells.
The first main finding was that persistent and increasing economic difficulties were consistently associated with subsequent shorter and longer sickness absence spells, with the associations being somewhat stronger the longer the absence.
Although the authors did not investigate the causes of "early" or "late" return, they suggested that late return coincides with the withdrawal of sickness benefits and argued "unless stroke patients returned to work during the earlier period, they preferred to receive longer sickness benefits, and such benefits may delay them from returning to work".
The occupational health care by the SSA ends when the worker is no longer sick-listed and the sickness benefit ends.
While we no longer blame sickness and disease on the phases of the moon, you will hear people use it as a casual explanation for crazy behavior.
Dewa et al 12 also observed a longer period of sickness absence free days for workers who had a previous sickness absence episode related to a physical disorder (1053 days) than those who had a previous sickness absence episode related to a mental disorder (673 days).
You are correct that having twins can make the period of morning sickness longer: it is usual for it to taper off, even then, by the 20th week.
Even if we ignore the lives, hopes and dreams behind the figures, they remain stark: 440,000 people with long-term illnesses or disabilities hit by the bedroom tax; 428,000 to lose the support they rely on to get around; 700,000 no longer eligible for sickness benefits from an arbitrary one-year limit.
One reason may be that there was exposure to a longer period of sickness absence in this study.
