title: A prospective, multi-centre, observational study to examine kidney disease progression in adults with chronic kidney disease - CKDOD - Study design and preliminary results.
abstract: BACKGROUND
  The objective of this article is to describe the organisation of an international, clinical registry, the Chronic Kidney Disease Observational Database (CKDOD), the processes of enrolling patients and entering data and preliminary results to date.
  
  
  METHODS
  The Chronic Kidney Disease Observational Database (CKDOD) is designed to assess the association between different factors with a known influence on chronic kidney disease (CKD) progression as well as treatment strategies such as dietary modifications, blood pressure control and pharmacological interventions in Asian countries (India, China, Malaysia and Thailand). The only inclusion criterion is the presence of CKD stage 2 or higher as defined by the KDIGO guidelines. Demographic and clinical information are collected by a standardised electronic questionnaire, available in English and Chinese. The data are transferred to the CKDOD database either by e-mail or via web access. All data are checked for consistency and missing values. Collection of data started in September 2011 and by April 2015, data on 1323 individual patients had been submitted. The mean age at inclusion was 57 ± 14 years, 67 % were male and 36 % were diabetic. The baseline estimated glomerular filtration rate was 26 ml/min/1.73 m(2). Of all enrolled patients, 324 (24 %) received ketoanalogue supplementation during at least one recorded visit.
  
  
  CONCLUSIONS
  The CKDOD is a very large and comprehensive data repository, currently focused in subjects recruited from Asia. The database is expected to provide important long-term information on CKD progression, nutritional and metabolic derangements that accompany CKD progression and treatment strategies to ameliorate progression and complications of CKD.
  
  
  BACKGROUND
  Clinical Trial Registry - India: CTRI/2012/06/002743 ; 25th July 2012.
authors.affiliation: Anil Clinic, Mumbai, India. dr_bharatvshah@yahoo.co.in.
authors.forename: Bharat
authors.initials: B
authors.lastname: Shah
authors.affiliation: Kidney and blood pressure clinic, Mumbai, India. dkirpalani@hotmail.com.
authors.forename: Ashok
authors.initials: A
authors.lastname: Kirpalani
authors.affiliation: Department of Nephrology, RML (Ram Manohar Lohiya) hospital, New Delhi, India. shamsunderrml@rediffmail.com.
authors.forename: Sham
authors.initials: S
authors.lastname: Sunder
authors.affiliation: Intermed Superspeciality Clinic, New Delhi, India. ashwani_gupta@yahoo.com.
authors.forename: Ashwani
authors.initials: A
authors.lastname: Gupta
authors.affiliation: Lancelot Hospital, Mumbai, India. mu_khanna@yahoo.co.in.
authors.forename: Umesh
authors.initials: U
authors.lastname: Khanna
authors.affiliation: Supreme Kidney Care, Nashik, India. nchafy@hotmail.com.
authors.forename: Deodatta
authors.initials: D
authors.lastname: Chafekar
authors.affiliation: University Malaya Medical Centre, Renal unit, Faculty of Medicine, Kuala Lumpur, Malaysia. lipita@gmail.com.
authors.forename: Li Ping
authors.initials: LP
authors.lastname: Tan
authors.affiliation: Department of Medicine, Khon Kaen Medical School, Khon Kaen City, Thailand. dhavee@kku.ac.th.
authors.forename: Dhavee
authors.initials: D
authors.lastname: Sirivongs
authors.affiliation: Dr. Medica Institute of Kidney Diseases, Kolkata, India. dilip.pahari@medicasynergie.in.
authors.forename: Dilip
authors.initials: D
authors.lastname: Pahari
authors.affiliation: Department of Nephrology, St. John's Medical College & Hospital, Bangalore, India. gokul_neph@yahoo.co.uk.
authors.forename: Gokul
authors.initials: G
authors.lastname: Nath
authors.affiliation: Vanderbilt University Medical Center, Division of Nephrology, 1161 21st Avenue South, S-3223 Medical Center North, Nashville, TN, 37232-2372, USA. alp.ikizler@Vanderbilt.Edu.
authors.forename: Talat Alp
authors.initials: TA
authors.lastname: Ikizler
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016208:Databases, Factual; D018450:Disease Progression; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D051436:Renal Insufficiency, Chronic / Q000150:complications*; D012107:Research Design; D055815:Young Adult