Tableau
PériodeCrises HM N (%)Mortalité N (%)Age (IQ)Célocurine (%)Dantrolène (%)
1969–200711535 (31)16 (7–21)5046
1969–197922 (19)13 (59)14 (11–20)760
1980–198937 (32)14 (38)13 (6–22)6442
1990–199941 (35)7 (18)15 (10–28)3968
2000–200715 (13)1 (7)20 (13–28)860
Variationsp<0.002NSp<0.007p<0.001