Fig. 3.

Patient global assessment of the method of pain control at 24 h in patients treated with fentanyl iontophoretic transdermal system. There were no statistically significant differences between the non-geriatric and geriatric patients in terms of patients reporting success in the total patient population on the patient global assessment at 24 h (80.0 vs. 83.0%, respectively; p = 0.3415). For study 095-16, 100% of patients achieved success in the >65 years group. This resulted in infinity odds of success in the >65 years group, hence the odds ratio and its 95% confidence interval cannot be calculated. In this situation, the p value that tests null hypothesis “the same success rate in ≤65 years and >65 years group” is an appropriate statistic to look at. CI confidence interval, OR odds ratio