Sir , I had my PSA test done last year as a part of  preventive health checkup in my office.. My PSA level (Total) was 0.8 ng/ml. My whole abdomen Ultrasound showed normal prostate gland. I don't have any urine related issue at all and my KFT is also normal. My father had CA prostate 11yrs back and had radical prostatectomy. After that he has shown normal PSA level so far.    Is my level Normal ? Is PSA greater than 1 or 1.5 ng/ml is a reason for  worry in my age. or i shouldn't be worried until it is less than 4 ng/ml. Kindly advice. Thanks