Table 2.

 Characteristics of cases and controls. Values are numbers (percentages)

Characteristics	Cases (n=451)	Controls (n=2696)
Age (years):
<20	2 (0.4)	14 (0.5)
20-44	74 (16.4)	440 (16.3)
45-64	191 (42.4)	1158 (43.0)
⩾65	184 (40.8)	1084 (40.2)
Sex:
Female	282 (62.5)	1687 (62.6)
Male	169 (37.5)	1009 (37.4)
Use of antipsychotic within 3 months of index date:*
Conventional antipsychotics	268 (59.4)	1428 (53.0)
Olanzapine	9 (2.0)	15 (0.6)
Risperidone	11 (2.4)	42 (1.6)
Other newer agents	1 (0.2)	7 (0.3)

^*Categories not mutually exclusive.