- Modified Pulmonary Index Score (MPIS): Children will be assessed for clinical changes during therapy by utilizing the modified pulmonary index score (MPIS) which is a combination of 6 physiologic parameters, each graded 0-3, the sum of which reflects pulmonary status. The MPIS was assessed for reproducibility and validity and was shown to be highly reproducible across groups of health care providers (nurses, physicians, respiratory therapists) and was a valid indicator of asthma severity in children.