Assuming this death was caused by P . vivax , the risk of ARDS - related maternal mortality in this setting did not differ significantly between Plasmodium falciparum and P . vivax ( 0 . 24 per 1 , 000 ( 1 / 4 , 158 ) versus 0 . 23 per 1 , 000 ( 1 / 4 , 298 ) , contrary to the increased risk of maternal mortality from P . falciparum