Odds ratios (OR) and 95% confidence interval (95% CI) for association of prescribing inappropriate splitting drugs and physician specialty.

Multiple logistic regression, Hosmer and Lemeshow goodness-of-fit test: all p>0.05.aAdjusted by age and sex.bFemale, adjusted by age, sex, sex and physician specialty interactions.cAge 18–64 yrs, adjusted by age, sex, age and physician specialty interactions.dThe physician specialty which has the lowest proportion of prescriptions with inappropriate splitting.eData was excluded due to small sample size (n/N = 4/5).*p