Why is creatinine level raised in IgA nephropathy patient?

Hello doctor,

I am 57 years old and have IgA nephropathy for the past eight years which is being treated with Cardace 10 mg, Minipress XL 5 mg, Lipitor 10 mg, and fish oil capsules. I had an ultrasound eight months back which showed normal kidneys. Also, I have a benign prostate (grade 1) and not under medication. BP is around 130/80 mmHg. My recent test results for this month are as follows:

1. Routine urine examination showed no protein or blood ( six months back it showed protein as trace, and blood as nil).
2. Total cholesterol: 144 mg/dl.
3. Serum Creatinine: 1.3 mg/dl (this was 1.2 mg/dl for the past two years).
4. My platelet count has been historically low varying from 128,000 to 150,000 cells per cubic mm of blood. The latest test shows a platelet count of 116,000 per cubic mm of blood.
5. BUN (blood urea nitrogen): 16.3 mg/dl.
6. PSA: 1.05 ng/ml.
7. Albumin in urine: 68.6 mg/L with ACR at 98.18 ug/mg.

I am concerned as the creatinine which was 1.2 mg/dl for the past two years (I test every six months) has increased to 1.3 mg/dl this month. My platelet count continues to be below the range. I would appreciate your views on the above regarding whether there is any cause for concern or I can continue current medication. I exercise daily for about 45 minutes.

Please advise.

Thank you doctor,

I was earlier checking the serum creatine from a laboratory where the range was 0.5 to 1.2 mg/dl, and my test results were 1.2 mg/dl. The latest serum creatinine test done was from another laboratory, and their range was 0.72 to 1.25 mg/dl, and my test result was 1.3 mg/dl, i.e., marginally over the range. Kindly tell me whether this marginal rise should be a concern given that other values like BUN etc., were fine.