Different Subject Structure

This is a (somewhat literary) use of inversion, to bring the topic to the prominent position at the front.

A more normal, neutral, word order would be

Various strategies to assess patient health factors are also found in this book

"Also" - conjunctive adverb, connects the idea of the previous sentence, (i.e. "In this book are ideas about potatoes. Also found in this book are potato recipes.")

"found in this book" - adjective phrase, used in this context to describe the subject of the verb "to be"

"are" - present tense, third person, plural conjugation of the verb "to be"

"various strategies to assess patient health factors" - subject phrase, where "strategies" is the specific noun in question and the other specify the kind of strategies

The meaning of the sentence, then, is that: [In addition to any previous sentences about the matter], [various strategies to assess patient health factors] [are] [in the contents of this book].