Statistical analysis
Descriptive statistics were presented as number (percentage) for
categorical variables; and as mean±standard deviation for quantitative
variables. The logistic regression model was used to determine the
associations between patient characteristics and UMDs in univariate and
multivariable analyses. The following variables were tested by
univariate analysis: age, sex, medical specialty, education level,
living status, health insurance, type of admission, day of admission,
admitting physician experience, patient’s understanding of preadmission
medications, chronic diseases ( <2 vs ≥2 ) and medications on
BPMH ( ≥5 drugs vs <5 drugs ). Variables with a significant
relationship ( P <0.20 ) by univariate analysis were entered
into the multivariable model. Analyses were performed by SPSS 20.0. P
values < 0.05 were regarded as statistically significant.