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.
Once open, click File, choose the Save As option, and for the Save as type option, select CSV (Comma delimited) or CSV (Comma delimited) (*.csv) , depending on your version of Microsoft Excel. After you save the file, you are free to open it up in a text editor to view it or to edit it manually.otepad (or any text editor). To create a CSV file with a text editor, first choose your favorite text editor, such as Notepad or vim, and open a new file. Then enter the text data you want the file to contain, separating each field with a comma and each row with a new line. Save this file with the extension .csv.