Persistent Insomnia is a Predictor of
Hypertension in Japanese Male Workers: Machi
SUKA, et al. Department of Preventive Medicine, St.
Marianna University School of Medicine—Insomnia
is one of the most common complaints at worksites,
as well as in the general population. This study aims
to assess the effect of insomnia on the development of
hypertension in Japanese male workers. Using the
annual health examination database of a Japanese
telecommunication company, eligible middle-aged male
participants in the 1994 health examination were
followed up until 1998 or the development of
hypertension (either initiation of antihypertensive
therapy or a systolic blood pressure ≥140 mmHg and/
or a diastolic blood pressure ≥90 mmHg). The effect
of difficulty initiating sleep (DIS) was assessed with a
DIS dataset (n=4,794),