1. Consistently very poorly controlled asthma is associated with greater activity and school impairment in children with severe or difficult-to-treat asthma 
Leonard B. Bacharier, MD, Ronina A. Covar, MD, Tmirah Haselkorn, PhD, Ahmar Iqbal, MD, Cynthia Alvarez, M.S (Stats), David R. Mink, MS, Hubert Chen, MD, Robert S. Zeiger, MD, PhD 
The Journal of Allergy and Clinical Immunology: In Practice 
Volume 7, Issue 1, Pages (January 2019)
DOI: /j.jaip
Copyright © 2019 The Authors Terms and Conditions

2. Figure 1
WPAI:Asthma: A, Activity Impairment; B, School Impairment; C, Missed School Hours/Week. *P < .001; †P < .01; ‡P < .05. SD, Standard deviation; VPC, very poorly controlled; WPAI, Work Productivity and Activity Impairment.
The Journal of Allergy and Clinical Immunology: In Practice 2019 7, DOI: ( /j.jaip )
Copyright © 2019 The Authors Terms and Conditions