... length of stay for admissions to adult, general critical care units in England, Wales and Northern Ireland: the Intensive Care National Audit & Research Centre Case Mix Programme Database Crit Care ... SD, standard deviation measures of case mix, outcome and activity for all admissions with asthma, for those mechanically ventilated in the first 24 hours and for those who were not Case mix, outcome ... Analyses Age at admission and sex were extracted Case mix, outcome and activity were described for all admissions with asthma, admissions of patients with asthma who were mechanically ventilated...