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.
Select the CSV file you want to open. Excel opens the text file automatically and displays the data in a new workbook. This is the most direct (and quickest) route to open a CSV file. Excel uses the default data format settings to read and import each column of data.