. Author manuscript; available in PMC: 2011 Sep 1.

Published in final edited form as: Clin Pharmacol Ther. 2010 Jul 14;88(3):347–353. doi: 10.1038/clpt.2010.90

Table 3.

Odds ratios (95% confidence intervals) for the association between antiepileptic refilling and switching and seizure-related outcomes stratified by type of refill and switch

Exposure type	n^a	Odds ratio (95% CI)
*21-day case- and control-periods*
Refill
Brand	79	2.29 (1.42–3.70)
Generic	37	2.36 (1.17–4.78)
Switch
Generic-generic	10	2.33 (0.60–9.02)
Brand-generic or generic-brand	5	4.00 (0.45–35.79)
*28-day case- and control-periods*
Refill
Brand	105	1.92 (1.28–2.87)
Generic	46	2.54 (1.34–4.82)
Switch
Generic-generic	13	2.25 (0.69–7.31)
Brand-generic or generic-brand	6	2.00 (0.37–10.92)

n = number of index events that contributed to the estimation of the odds ratio