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.
The CSV file format is variously referred to âcomma-separated valuesâ or âcharacter-separated values.â Excel (.xls, .xlsx) files can be easily exported into CSV files. A CSV file stores tabular data (numbers and text) in plain text form.