The test is ordered if one is suffering from diabetes to check if the kidneys are working well. It is also done if the person is on antihypertensive medicines as the medicines may have an adverse effect on kidneys. If any of the following symptoms are present, the test is indicated:
The normal range for creatinine is 74.3 to 107 micromoles/litre. Since the creatinine levels increase with muscle mass, usually men have higher levels of creatinine as compared to women.
When creatinine is higher than normal, it can be suggestive of:
Negative results mean— the levels very rarely drop below normal. It could be because of low muscle mass, but it is not a worrisome finding.