Personality profiles in paradoxical insomnia: a case-control study

Area of Science:

• Psychiatry and Sleep Medicine
• Clinical Psychology

Background:

• Paradoxical insomnia (PARA-I) presents diagnostic and treatment challenges.
• Personality profiles may differentiate insomnia subtypes, suggesting their clinical relevance.

Purpose of the Study:

• To compare personality profiles of individuals with paradoxical insomnia (PARA-I), psycho-physiological insomnia (PSY-I), and normal sleepers (NS).

Main Methods:

• A cross-sectional case-control study involving 20 PARA-I patients, 20 PSY-I patients, and 60 normal sleepers.
• Participants were matched for age, gender, education, and health status.
• The Minnesota Multiphasic Personality Inventory (MMPI) short form was administered to assess personality profiles.

Main Results:

• Both PARA-I and PSY-I groups showed significant differences in personality subscales compared to normal sleepers (P=.001).
• PARA-I patients differed in hysteria and hypomania subscales (P<.05) versus normal sleepers.
• PSY-I patients differed in hysteria, hypochondriasis, and psychopathic subscales (P=.001) versus normal sleepers.
• No significant personality differences were found between PARA-I and PSY-I groups.

Conclusions:

• Significant personality profile differences exist between PARA-I and PSY-I patients compared to normal sleepers, as measured by the MMPI.
• These findings underscore the importance of personality assessment in the diagnosis and treatment of insomnia subtypes.