Fig II.
Factor analysis of mixed data for categorical and quantitative variables: (A) graph of categories representing spatial relationship of variables in the context of the first and second informational dimensions; (B) graph of variables demonstrating spatial relationship of both quantitative and categorical variables in the context of the first two informational dimensions; (C) primary component analysis of quantitative variables; (D) graph of individual students in regard to descriptive categorical information. YEAR1 = 1st-year students; OTHER YEARS = students enrolled in all other years; NSI_X/NSI_NO = students who had not sustained needlestick injury; NSI_YES = students who had sustained a needlestick injury; NSIrep_YES = students who had sustained and reported a needlestick injury; NSIrep_NO = students who had sustained but did not report a needlestick injury; INT = Internal Medicine Exam; ODDE = Occupational Diseases in Dentistry Exam; NSI_knowledge = needlestick injury-related knowledge; HEPknowledge = overall hepatitis-related knowledge