The NCLEX exam covers four areas starting with hygiene maintenance and infection control under the safe effective care environment element. As an important field of work today, health promotion and maintenance constitute the rising need for preventive healthcare. Psychosocial integrity looks at the applicant’s ability to handle stress and delivering mental health care. Physiological integrity measures the ability to deliver proper nursing care, and thus covers the majority of the exam.

Source:
https://nursejournal.org/articles/6-things-to-know-about-the-nclex-examination/