This is an E-supplement to GAO-10-70 This document presents the responses from two Web-based questionnaires on the process for identifying and citing nursing home deficiencies. We collected this information to study and report on the factors that contribute to the understatement of serious deficiencies on nursing home surveys. We developed two Web-based questionnaires--one for the nursing home surveyors and one for the state agency directors. Both questionnaires asked about the Centers for Medicare & Medicaid Services' (CMS) survey process, the surveyor work force, surveyor training, supervisory review, and state policies and practices. This document presents results from all closed-ended survey questions on both questionnaires, but does not include narrative responses that we received.