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.
Instead, you have to use the Save As command as weâll describe in the steps below. How to Export an Excel Spreadsheet to a CSV File. Step 1: Click on the Office button in the upper left-hand corner of Excel. Select Save As and then choose Other Formats.