Erratum to: The KMDS-NATION Study: Korean Movement Disorders Society Multicenter Assessment of Non-Motor Symptoms and Quality of Life in Parkinson's Disease NATION Study Group.

This corrects the article on p. 393 in vol. 12, PMID: 27819413.

The KMDS-NATION Study: Korean Movement Disorders Society Multicenter Assessment of Non-Motor Symptoms and Quality of Life in Parkinson's Disease NATION Study Group.

Background And Purpose: Nonmotor symptoms (NMS) in Parkinson's disease (PD) have multisystem origins with heterogeneous manifestations that develop throughout the course of PD. NMS are increasingly recognized as having a significant impact on the health-related quality of life (HrQoL). We aimed to determine the NMS presentation according to PD status, and the associations of NMS with other clinical variables and the HrQoL of Korean PD patients.

Activities of daily living questionnaire from patients' perspectives in Parkinson's disease: a cross-sectional study.

Background: The aim of this study was to develop an assessment tool for activities of daily living (ADL) from the perspective of patients with Parkinson's disease (PD) and examine the validity and reliability of the assessment.

Methods: A preliminary 45-item questionnaire was developed through intensive interviews with 54 patients with PD and administered to another group of 248 patients with PD. Based on clinical and statistical analyses, 20 ADL-items were selected.

Nonmotor symptoms more closely related to Parkinson's disease: comparison with normal elderly.

Nonmotor symptoms (NMSs) commonly occur in Parkinson's disease (PD). This study sought to explore the domains of NMSs that are more closely related to PD using nonmotor symptoms scale (NMSS), through a quantitative comparison of NMSs' prevalence and NMSS scores of PD patients with normal controls, and clinical implications. We performed a prospective case-control study on PD patients (n=131) and age- and gender-matched normal controls (n=129).