Comparison Of The Burden Of Ibs With Constipation On Health-Related Quality Of Life (Hrqol), Work Productivity, And Health Care Utilization To Asthma, Migraine, And Rheumatoid Arthritis In The Us, Uk, And France.

■ Work impairment was measured using the Work Productivity and Activity Impairment (WPAI) questionnaire.6 The WPAI is a 6-item, self-administered survey designed to measure the impact of a person’s health on their work productivity (including amount of work time missed due to health problems, as well as decreases in productivity when working due to health problems) and non-work related activities (e.g., shopping, child care). Items on the WPAI are scored to produce the following measures: