HELP!! Using DAYS360 to calculate age at visit, follow-up days for list of patients

mitone

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Jul 16, 2012
Messages
7
Hi, I am updating a very large spreadsheet containing diagnostic information about patients. I need to add two columns of information: "Age at first visit" and "Follow-up Day" (the number of days after the first visit). To do this I am using the following formulas: "Age at first visit": =DAYS360(Date of Birth,Earliest Visit Date)/360 "Follow-up Day" =DAYS360(Earliest Visit Date,Visit Date in question).

I work at an eye clinic, so each patient actually usually has 2 visits per visit date (one for each eye), if that makes sense. As I said I have many, many columns of information, but the ones that are of use in this question are as follows:

FirstName / Lastname / Patient ID (unique to each patient) / Eye (Right or Left) / Age at first Visit / Follow-up Day / Visit Date (Chronological) / DOB

As I said, I don't think all of the categories above need to be used, but these are the ones that I thought might be useful.

I'm really having a hard time coming up with any easy way to do this, and I don't know if it is even possible to have a click-and-dragable formula.

Any help would be appreciated!!
 

Excel Facts

Excel Wisdom
Using a mouse in Excel is the work equivalent of wearing a lanyard when you first get to college
For age at first visit =year(DateOfFirstVisit)-year(Birthday) <--format is as number (it might try to format as a date at first)

What do you want the follow up day to be?
You can always do =(DateOfVisit)+#ofDaysToNextVisit
or.
=FutureDate-LastVisitDate <--format as number

I'm not sure if this answers your question, let us know.
 
Upvote 0
Thank you for your speedy reply. I apologize, I probably didn't explain my predicament very well. I think the DAYS360 formulas work okay, and the ones you gave me above, would work just as well. My problem is in how to make it into a click-and-dragable formula, because I have to do this for 5000+ rows of patent info. So here's an example of the layout, and what I need:

First Name / Last Name / Patient ID / Eye / Age at first visit / Follow-up Day / Visit Date / DOB
John / Doe / 1 / Right / -- / -- / 1/1/2000 / 1/1/1950
John / Doe / 1 / Right / -- / -- / 7/1/2000 / 1/1/1950
John / Doe / 1 / Right / -- / -- / 2/2/2001 / 1/1/1950
John / Doe / 1 / Left / -- / -- / 1/1/2000 / 1/1/1950
John / Doe / 1 / Left / -- / -- / 7/1/2000 / 1/1/1950
John / Doe / 1 / Left / -- / -- / 2/2/2001 / 1/1/1950
Jane / Smith / 2 / Right / -- / -- / 3/3/2001 / 2/2/1945
Jane / Smith / 2 / Right / -- / -- / 4/4/2001 / 2/2/1945
Jane / Smith / 2 / Left / -- / -- / 3/3/2001 / 2/2/1945
Jane / Smith / 2 / Left / -- / -- / 4/4/2001 / 2/2/1945

So there is an example, for John Doe, the DAYS360 formula I am using in the "Age at first visit" column would return a value of 50.0 (because we want it in years to one decimal point), and I would want that column to return that same value for each cell corresponding to John Doe, but I want it to change (automatically I hope) to reference Jane Smith's information and would return a value of about 56.1 years and give that number for each cell corresponding to Jane Smith. So on, and so forth for the rest of the 5,000+ lines.

Similarly, the "Follow-up Day" would return a value of "0" for the first Follow-up Day, but then calculate the number of days that have passed since the first exam date. For example, the DAYS360 formula I am using would return a value of 180 (because we want it in days) for the second exam date and a value of 391 for the third exam date, so on and so forth.

The problem I am having is how to establish the formula/wording so that as I click and drag it always references the first exam date for that corresponding patient, but when I reach a new patient's line, it switches to always reference the first exam date for that patient.

I hope that makes sense!

Thank you SO SO much!!!
 
Upvote 0
Sorry, but as an update, I figured out a good way for the "Age at first Visit" column, but I'm still having problems thinking of a good way for the "Follow-up Day" column.
 
Upvote 0
If your data is as you posted above, you should have no trouble double-clicking the bottom-right corner of a cell and having the formula drop down the column.

I stand by the formulas I posted above. They will both work in your situation. What you are missing is a "NextVisitDate" How can you calculate how many days until their next visit if you don't know when the next scheduled visit is?
 
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