Associated insomnia
[1] Mental disorder - The essential factor of this type
of insomnia is the temporal and causal relationship with
an underlying mental disorder. Mood disorders such as
depression, dysthymia, cyclothymia, bipolar disorder,
anxiety, schizophrenia and somatoform disorders are examples
of mental disorders associated with this type of
insomnia3-5,12-18.
[2] Inadequate sleep hygiene - This is related to habits
that are inappropriate for good quality of sleep, for example
psychologically stressful activities, consumption
of caffeine, nicotine, alcohol and heavy meals, vigorous
physical activity close to bed time, inconstant time for
going to sleeping and waking up, long naps or naps near
the main time for sleeping4
.
[3] Medical condition - This sleep disorder is related
to particular medical conditions, for example painful syndromes,
infections, metabolic diseases, hyperthyroidism
and neurological diseases4
.
[4] Use of substances or medication - This sleep disorder
is related to the use of a drug or substance such as al-