According to the American Cancer Society, a PSA level between 4 and 10, indicates a 25% chance of it being prostate cancer. A PSA higher than 10, increases the chance of having prostate cancer to 50% and above.
There are several factors that can also elevate the PSA, such as:
ejaculation (no ejaculation at least two days prior to test)
PSA levels can naturally increase with age
inflammation of the prostate gland
non cancerous enlargement of the prostate
Since yours is 1.4, I would not worry. Your doctor is correct.
Zig