Risk factors for primary intracerebral hemorrhage: a population-based nested case-control study

Area of Science:

• Neurology
• Epidemiology
• Public Health

Background:

• Primary intracerebral hemorrhage (PICH) is a significant cause of mortality and disability.
• Identifying modifiable and non-modifiable risk factors is crucial for effective prevention strategies.
• Previous research has suggested various associations, but a comprehensive population-based analysis is warranted.

Purpose of the Study:

• To investigate the risk factors associated with primary intracerebral hemorrhage (PICH) in a large population cohort.
• To explore risk factors specific to different subtypes of PICH, namely lobar and nonlobar.
• To identify potential targets for public health interventions aimed at reducing PICH incidence.

Main Methods:

• A nested case-control study design was employed within a prospective population-based health screening program.
• Data from 22,444 men and 10,902 women (mean age 47) screened between 1974 and 1991 were analyzed.
• 147 incident PICH cases were compared with 1,029 matched stroke-free controls over a mean follow-up of 14 years.

Main Results:

• PICH cases exhibited significantly higher systolic blood pressure, triglycerides, BMI, and shorter stature compared to controls.
• Diabetes and a history of psychiatric morbidity were more prevalent in PICH cases.
• Adjusted logistic regression revealed significant associations between PICH and high systolic blood pressure, diabetes, high triglycerides, short stature, and psychiatric morbidity.

Conclusions:

• Hypertension, diabetes, short stature, elevated triglycerides, and psychiatric morbidity are confirmed risk factors for PICH.
• Smoking emerged as a significant risk factor exclusively for lobar PICH, not nonlobar PICH.
• These findings underscore the importance of managing cardiovascular and mental health for PICH prevention.