Environmental risk factors and conversion to multiple sclerosis in subjects with radiologically isolated syndrome: a case–control study

Key Points

• Conversion to multiple sclerosis occurs in some individuals with radiologically isolated syndrome, raising concerns about environmental influences.
• The study identifies several environmental risk factors linked to this conversion process in at-risk individuals.
• Case-control study design allows for a robust comparison between those who convert and those who do not, highlighting key differences.
• Understanding these environmental triggers may help in developing preventive strategies and improve early intervention efforts.