my husband is insulin dependant diabetic so we have all the kit at home which i use twice a year on myself

Fasting glucose level overnight should be below 6.1
Glucose level 2 hrs after eating should be below 7.8
Pre diabetes - fasting is 6.1-6.9
2hrs after eating is 7.8 - 11.0
Any figures above the above is full blown diabetes.
So if you are going to chemist during the day make sure its done 2 hrs after a meal.