Wansu Chen, MS

Articles

December 16th 2010

Step-Up Care Improves Impairment in Uncontrolled Asthma: An Administrative Data Study

Robert S. Zeiger, MD, PhD Michael Schatz, MD, MS Qiaowu Li, MS Feng Zhang, MS Anna S. Purdum, PharmD, MS Wansu Chen, MS

Significant clinically meaningful improvements in asthma impairment are documented by administrative data for 1 year after initiation of step-up care in patients with uncontrolled asthma.

November 4th 2010

Persistent Asthma Defined Using HEDIS Versus Survey Criteria

Michael Schatz, MD, MS Robert S. Zeiger, MD, PhD Su-Jau T. Yang, PhD Wansu Chen, MS William W. Crawford, MD Shiva G. Sajjan, PhD Felicia Allen-Ramey, PhD

HEDIS-defined persistent asthma is generally consistent with survey-defined persistent asthma over a 3-year period.

May 11th 2010

Relationship of Asthma Control to Asthma Exacerbations Using Surrogate Markers Within a Managed Care Database

Michael Schatz, MD, MS Robert S. Zeiger, MD, PhD Su-Jau T. Yang, PhD Wansu Chen, MS William W. Crawford, MD Shiva G. Sajjan, PhD Felicia Allen-Ramey, PhD

Fewer short-acting agonist canisters dispensed (but not dispensing of any controller) and higher ratio of controller to total medication are associated with reduced asthma exacerbations.