a significant trendp = 0.007
There was a significant trend for the development of SPMS to be associated with a higher T2 lesion volume increase over 20 years than in patients who remained RRMS ( p = 0.007), and the T2 lesion volume increase in patients diagnosed with SPMS appeared to be higher than in those with RRMS ( p = 0.08) [ 10 ].