In 2002, the National Kidney Foundation published treatment guidelines that identified five stages of Chronic Kidney Disease (CKD) based on declining GFR measurements. The guidelines recommend different actions based on the stage of kidney disease.
CSV (Comma Separated Value) was a file format devised to store tabular data. It uses commas to separate each entry in a row and the newline symbol to go to the next row. Excel is a more recent spreadsheet application from Microsoft and it saves the data with its own file format.
Use. Several programs can create and read CSV files. Microsoft Excel uses them extensively, and Outlook can export and import CSV files for transportation. Other common applications that use CSV files are OpenOffice, Microsoft Works, WordPerfect Office and NeoOffice.