Statistical analysis
Quantitative variables were expressed as mean, SD, and range;
qualitative variables were expressed as frequencies and percentages.
Discrepancies between prescription criteria were assessed using
crosstabs and compared using the Chi-square test or Fisher exact test,
p-values of 5% or lower were considered to be statistically
significant. The statistical analysis was performed using SPSS 15.0
(SPSS, Inc., Chicago, Illinois, USA).