Correction

In Table 5 of the above, the entry in the last cell of the Olanzapine row should read 13. The corrected table appears below.

TabLE 5 Numbers needed to treat (NNT) for all-cause discontinuation for the Tiihonen study^a

	Comparator
		Clozapine	Olanzapine	Perphenazine	Risperidone	Haloperidol	Depot perphenazine
Primary	Clozapine		6	2	4	2	15
	Olanzapine	−6		2	8	2	13
	Perphenazine	−2	−2		−4	5	−2
	Risperidone	−4	−8	4		2	−4
	Haloperidol	−2	−2	−5	−2		−2
	Perphenazine depot	−15	−13	2	4	2