All home glucometers are considered only approximations for testing.
Here is a link explaining:
http://forecast.diabetes.org/meters-jan2013
Quote:
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For results at or above 75 mg/dl: 95 percent of meter test results must be within plus or minus 20 percent of the actual blood glucose level....Example: An actual blood glucose result of 180 mg/dl could show on a meter as any value from 144 mg/dl to 216 mg/dl and meet the standard.
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Even in this article the explanation of "accuracy" is difficult to grasp IMO. So getting really picky about various readings that vary from day to day...may just be a function of the strip that day and/or the meter itself.
I do know that very low levels are not accurate. Most glucometers explain that.
So keeping any log or track of levels...is quite fluid...don't get overly concerned about slight changes up or down.
Keep in mind your pancreas can change too...many type II diabetics eventually tire out their pancreas and may need a basal injectable insulin.
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Weezie looking at petunias 8.25.2017
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