lmauro if you are able to post more of the scores you have access too there will be someone here that can hopefully tell you what each score relates to or how they all work together.
From what you have said I am guessing that the 145 is maybe his VCI or PRI score and the Composite score is his FSIQ? Suggesting that maybe one or more of the four main sections was not as high as the VCI? It's hard to know without more numbers.
The Comprehension section of the WISC is not like a reading comprehension test, it's more a verbal/social comprehension test.
