Thankfully, my endo has never even mentioned a suggested basal/bolus ratio. He gave me starting numbers three years ago when I first went on MDI insulin. I’ve done all my own adjusting since, based upon the information in John Walsh’s Using Insulin and tests for both basal level and bolus ratios. Since I’ve consistently had an A1c under 6.0 and have never had a serious hypo, my endo has never questioned by ability to do my own calculations and make my own determination of how to handle most things.
I just checked my insulin use for the month of July, and it has been 26% basal to 74% bolus. During one summer when I was particularly active, it was closer to 20-80%. And during some months when I’m sleeping in more frequently and choose to put the insulin for my DP into my basal rather than taking care of it at the same time as my breakfast bolus, the ratio is closer to 30-70. This is based upon a diet which usually contains 120-150 grams carbohydrate daily.
Keep in mind, though, that I’m age 74. According to some of the references I’ve read, basal needs drop after age 65, often by about 30% from what they were for the same individual who is younger. I would think that bolus needs would drop, too, due to lower activity levels, but I haven’t seen anything about how much that would likely be.