new south wales National Center for Biotechnology Information NCBI NLM MEDLINE humans pubmed abstract nih national institutes of health national library of medicine logistic models chi-square distribution validation study practice guidelines as topic guideline adherence medical records data collection / methods family practice / organization & administration pmid:11838403 p bolton g prior h usher family practice / standards forms and records control / methods* problem-oriented* primary health care* / standards primary health care* / statistics & numerical data